diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 5d33f2957..506607333 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -39,303 +39,379 @@
         <activity
             android:name=".activity.MainActivity"
             android:configChanges="keyboardHidden|orientation"
-            android:label="@string/app_name" >
+            android:label="@string/app_name">
             <meta-data
                 android:name="android.app.default_searchable"
-                android:value="de.danoeh.antennapod.activity.SearchActivity" />
+                android:value="de.danoeh.antennapod.activity.SearchActivity"/>
             <meta-data
                 android:name="android.app.searchable"
-                android:resource="@xml/searchable" />
+                android:resource="@xml/searchable"/>
+
             <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
         </activity>
         <activity
             android:name="de.danoeh.antennapod.activity.AddFeedActivity"
             android:configChanges="keyboardHidden|orientation"
             android:label="@string/add_new_feed_label"
-            android:windowSoftInputMode="adjustResize" >
+            android:windowSoftInputMode="adjustResize">
             <intent-filter>
-			    <action android:name="android.intent.action.VIEW"/>
-			    <category android:name="android.intent.category.DEFAULT"/>
-			    <category android:name="android.intent.category.BROWSABLE"/>
-			    <data android:scheme="http"/>
-			    <data android:scheme="https"/>
-			    <data android:host="*"/>
-			    <data android:pathPattern=".*\\.xml"/>
-			    <data android:pathPattern=".*\\.rss"/>
-			</intent-filter>
-			
-			<intent-filter>
-			    <action android:name="android.intent.action.VIEW"/>
-			    <category android:name="android.intent.category.DEFAULT"/>
-			    <category android:name="android.intent.category.BROWSABLE"/>
-			    <data android:scheme="http"/>
-			    <data android:scheme="https"/>
-			    <data android:host="feeds.feedburner.com"/>
-			    <data android:host="feedproxy.google.com"/>
-			    <data android:host="feeds2.feedburner.com"/>
-			    <data android:host="feedsproxy.google.com"/>
-			</intent-filter>
-			
-			<intent-filter>
-			    <action android:name="android.intent.action.VIEW"/>
-			    <category android:name="android.intent.category.DEFAULT"/>
-			    <category android:name="android.intent.category.BROWSABLE"/>
-			    <data android:scheme="http"/>
-			    <data android:scheme="https"/>
-			    <data android:mimeType="text/xml"/>
-			    <data android:mimeType="application/rss+xml"/>
-			    <data android:mimeType="application/atom+xml"/>
-			    <data android:mimeType="application/xml"/>
-			</intent-filter>
+                <action android:name="android.intent.action.VIEW"/>
+
+                <category android:name="android.intent.category.DEFAULT"/>
+                <category android:name="android.intent.category.BROWSABLE"/>
+
+                <data android:scheme="http"/>
+                <data android:scheme="https"/>
+                <data android:host="*"/>
+                <data android:pathPattern=".*\\.xml"/>
+                <data android:pathPattern=".*\\.rss"/>
+            </intent-filter>
+
             <intent-filter>
-                <action android:name="android.intent.action.SEND" />
+                <action android:name="android.intent.action.VIEW"/>
 
-                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.DEFAULT"/>
+                <category android:name="android.intent.category.BROWSABLE"/>
 
-                <data android:mimeType="text/plain" />
+                <data android:scheme="http"/>
+                <data android:scheme="https"/>
+                <data android:host="feeds.feedburner.com"/>
+                <data android:host="feedproxy.google.com"/>
+                <data android:host="feeds2.feedburner.com"/>
+                <data android:host="feedsproxy.google.com"/>
+            </intent-filter>
+
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW"/>
+
+                <category android:name="android.intent.category.DEFAULT"/>
+                <category android:name="android.intent.category.BROWSABLE"/>
+
+                <data android:scheme="http"/>
+                <data android:scheme="https"/>
+                <data android:mimeType="text/xml"/>
+                <data android:mimeType="application/rss+xml"/>
+                <data android:mimeType="application/atom+xml"/>
+                <data android:mimeType="application/xml"/>
+            </intent-filter>
+            <intent-filter>
+                <action android:name="android.intent.action.SEND"/>
+
+                <category android:name="android.intent.category.DEFAULT"/>
+
+                <data android:mimeType="text/plain"/>
             </intent-filter>
         </activity>
         <activity
             android:name="de.danoeh.antennapod.activity.FeedItemlistActivity"
-            android:configChanges="orientation|screenSize" >
+            android:configChanges="orientation|screenSize">
             <meta-data
                 android:name="android.app.default_searchable"
-                android:value="de.danoeh.antennapod.activity.SearchActivity" />
+                android:value="de.danoeh.antennapod.activity.SearchActivity"/>
             <meta-data
                 android:name="android.app.searchable"
-                android:resource="@xml/searchable" />
+                android:resource="@xml/searchable"/>
         </activity>
         <activity
             android:name="de.danoeh.antennapod.activity.ItemviewActivity"
-            android:configChanges="keyboard|orientation" />
+            android:configChanges="keyboard|orientation"/>
         <activity
             android:name="de.danoeh.antennapod.activity.DownloadActivity"
-            android:label="@string/downloads_label" />
+            android:label="@string/downloads_label"/>
         <activity
             android:name=".activity.AudioplayerActivity"
-            android:launchMode="singleTop" >
+            android:launchMode="singleTop">
             <intent-filter>
-                <action android:name="android.intent.action.VIEW" />
+                <action android:name="android.intent.action.VIEW"/>
 
-                <category android:name="android.intent.category.DEFAULT" />
-                <category android:name="android.intent.category.BROWSABLE" />
+                <category android:name="android.intent.category.DEFAULT"/>
+                <category android:name="android.intent.category.BROWSABLE"/>
 
-                <data android:scheme="file" />
-                <data android:mimeType="audio/*" />
+                <data android:scheme="file"/>
+                <data android:mimeType="audio/*"/>
             </intent-filter>
         </activity>
 
         <service
             android:name=".service.download.DownloadService"
-            android:enabled="true" />
+            android:enabled="true"/>
         <service
             android:name="de.danoeh.antennapod.service.PlaybackService"
-            android:enabled="true" >
+            android:enabled="true">
+        </service>
+
+        <service
+            android:name=".service.GpodnetSyncService"
+            android:enabled="true">
         </service>
 
         <activity
             android:name=".activity.PreferenceActivity"
             android:configChanges="keyboardHidden|orientation"
-            android:label="@string/settings_label" >
+            android:label="@string/settings_label">
         </activity>
         <activity
             android:name=".activity.DownloadLogActivity"
-            android:label="@string/download_log_label" >
+            android:label="@string/download_log_label">
         </activity>
 
         <receiver
             android:name=".receiver.MediaButtonReceiver"
-            android:exported="true" >
+            android:exported="true">
             <intent-filter>
-                <action android:name="android.intent.action.MEDIA_BUTTON" />
+                <action android:name="android.intent.action.MEDIA_BUTTON"/>
             </intent-filter>
             <intent-filter>
-                <action android:name="de.danoeh.antennapod.NOTIFY_BUTTON_RECEIVER" />
+                <action android:name="de.danoeh.antennapod.NOTIFY_BUTTON_RECEIVER"/>
             </intent-filter>
         </receiver>
 
-        <activity android:name=".activity.FeedInfoActivity" >
+        <activity android:name=".activity.FeedInfoActivity">
         </activity>
 
         <service
             android:name=".service.PlayerWidgetService"
             android:enabled="true"
-            android:exported="false" >
+            android:exported="false">
         </service>
 
-        <receiver android:name=".receiver.PlayerWidget" >
+        <receiver android:name=".receiver.PlayerWidget">
             <intent-filter>
-                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE"/>
             </intent-filter>
             <intent-filter>
-                <action android:name="de.danoeh.antennapod.FORCE_WIDGET_UPDATE" />
+                <action android:name="de.danoeh.antennapod.FORCE_WIDGET_UPDATE"/>
             </intent-filter>
 
             <meta-data
                 android:name="android.appwidget.provider"
-                android:resource="@xml/player_widget_info" />
+                android:resource="@xml/player_widget_info"/>
 
             <intent-filter>
-                <action android:name="de.danoeh.antennapod.STOP_WIDGET_UPDATE" />
+                <action android:name="de.danoeh.antennapod.STOP_WIDGET_UPDATE"/>
             </intent-filter>
         </receiver>
-        <receiver android:name=".receiver.FeedUpdateReceiver" >
+        <receiver android:name=".receiver.FeedUpdateReceiver">
             <intent-filter>
-                <action android:name="de.danoeh.antennapod.feedupdatereceiver.refreshFeeds" />
+                <action android:name="de.danoeh.antennapod.feedupdatereceiver.refreshFeeds"/>
             </intent-filter>
         </receiver>
 
-        <activity android:name=".activity.StorageErrorActivity" >
+        <activity android:name=".activity.StorageErrorActivity">
         </activity>
         <activity
             android:name=".activity.FlattrAuthActivity"
-            android:label="@string/flattr_auth_label" >
+            android:label="@string/flattr_auth_label">
             <intent-filter>
-                <action android:name=".activities.FlattrAuthActivity" />
+                <action android:name=".activities.FlattrAuthActivity"/>
 
-                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.DEFAULT"/>
             </intent-filter>
             <intent-filter>
-                <action android:name="android.intent.action.VIEW" />
+                <action android:name="android.intent.action.VIEW"/>
 
-                <category android:name="android.intent.category.DEFAULT" />
-                <category android:name="android.intent.category.BROWSABLE" />
+                <category android:name="android.intent.category.DEFAULT"/>
+                <category android:name="android.intent.category.BROWSABLE"/>
 
                 <data
                     android:host="de.danoeh.antennapod"
-                    android:scheme="flattr4j" />
+                    android:scheme="flattr4j"/>
             </intent-filter>
         </activity>
         <activity
             android:name=".activity.AboutActivity"
-            android:label="@string/about_pref" >
+            android:label="@string/about_pref">
         </activity>
         <activity
             android:name=".activity.OpmlImportFromPathActivity"
             android:configChanges="keyboardHidden|orientation"
-            android:label="@string/opml_import_label" >
+            android:label="@string/opml_import_label">
         </activity>
         <activity
             android:name=".activity.OpmlImportFromIntentActivity"
             android:configChanges="keyboardHidden|orientation"
-            android:label="@string/opml_import_label" >
+            android:label="@string/opml_import_label">
             <intent-filter>
-                <action android:name="android.intent.action.VIEW" />
+                <action android:name="android.intent.action.VIEW"/>
 
-                <category android:name="android.intent.category.DEFAULT" />
-                <category android:name="android.intent.category.BROWSABLE" />
+                <category android:name="android.intent.category.DEFAULT"/>
+                <category android:name="android.intent.category.BROWSABLE"/>
 
                 <data
                     android:host="*"
                     android:mimeType="*/*"
                     android:pathPattern=".*\\.opml"
-                    android:scheme="file" />
+                    android:scheme="file"/>
             </intent-filter>
             <intent-filter>
-                <action android:name="android.intent.action.VIEW" />
+                <action android:name="android.intent.action.VIEW"/>
 
-                <category android:name="android.intent.category.DEFAULT" />
-                <category android:name="android.intent.category.BROWSABLE" />
+                <category android:name="android.intent.category.DEFAULT"/>
+                <category android:name="android.intent.category.BROWSABLE"/>
 
                 <data
                     android:host="*"
                     android:pathPattern=".*\\.opml"
                     android:scheme="file"
-                    android:mimeType="text/x-opml" />
+                    android:mimeType="text/x-opml"/>
             </intent-filter>
         </activity>
         <activity
             android:name=".activity.OpmlFeedChooserActivity"
-            android:label="@string/opml_import_label" >
+            android:label="@string/opml_import_label">
         </activity>
         <activity
             android:name=".activity.SearchActivity"
             android:configChanges="keyboardHidden|orientation"
             android:label="@string/search_results_label"
-            android:launchMode="singleTop" >
+            android:launchMode="singleTop">
             <intent-filter>
-                <action android:name="android.intent.action.SEARCH" />
+                <action android:name="android.intent.action.SEARCH"/>
             </intent-filter>
 
             <meta-data
                 android:name="android.app.searchable"
-                android:resource="@xml/searchable" />
+                android:resource="@xml/searchable"/>
         </activity>
         <activity
             android:name=".activity.MiroGuideMainActivity"
-            android:label="@string/miro_guide_label" >
+            android:label="@string/miro_guide_label">
             <meta-data
                 android:name="android.app.default_searchable"
-                android:value="de.danoeh.antennapod.activity.MiroGuideSearchActivity" />
+                android:value="de.danoeh.antennapod.activity.MiroGuideSearchActivity"/>
             <meta-data
                 android:name="android.app.searchable"
-                android:resource="@xml/miroguide_searchable" />
+                android:resource="@xml/miroguide_searchable"/>
         </activity>
         <activity
             android:name=".activity.MiroGuideSearchActivity"
             android:configChanges="keyboardHidden|orientation"
-            android:launchMode="singleTop" >
+            android:launchMode="singleTop">
             <intent-filter>
-                <action android:name="android.intent.action.SEARCH" />
+                <action android:name="android.intent.action.SEARCH"/>
             </intent-filter>
 
             <meta-data
                 android:name="android.app.searchable"
-                android:resource="@xml/miroguide_searchable" />
+                android:resource="@xml/miroguide_searchable"/>
         </activity>
         <activity
             android:name=".activity.MiroGuideCategoryActivity"
-            android:configChanges="keyboardHidden|orientation" >
+            android:configChanges="keyboardHidden|orientation">
         </activity>
         <activity
             android:name=".activity.MiroGuideChannelViewActivity"
             android:configChanges="keyboard|orientation"
-            android:label="@string/miro_guide_label" >
+            android:label="@string/miro_guide_label">
         </activity>
         <activity
             android:name=".activity.VideoplayerActivity"
             android:configChanges="keyboardHidden|orientation"
-            android:screenOrientation="landscape" >
+            android:screenOrientation="landscape">
             <intent-filter>
-                <action android:name="android.intent.action.VIEW" />
+                <action android:name="android.intent.action.VIEW"/>
 
-                <category android:name="android.intent.category.DEFAULT" />
-                <category android:name="android.intent.category.BROWSABLE" />
+                <category android:name="android.intent.category.DEFAULT"/>
+                <category android:name="android.intent.category.BROWSABLE"/>
 
-                <data android:scheme="file" />
-                <data android:mimeType="video/*" />
+                <data android:scheme="file"/>
+                <data android:mimeType="video/*"/>
             </intent-filter>
         </activity>
         <activity
             android:name=".activity.PlaybackHistoryActivity"
-            android:label="@string/playback_history_label" />
+            android:label="@string/playback_history_label"/>
         <activity
             android:name=".activity.DirectoryChooserActivity"
-            android:label="@string/choose_data_directory" />
+            android:label="@string/choose_data_directory"/>
         <activity
             android:name=".activity.OrganizeQueueActivity"
             android:configChanges="orientation"
-            android:label="@string/organize_queue_label" >
+            android:label="@string/organize_queue_label">
+        </activity>
+        <activity
+            android:name=".activity.gpoddernet.GpodnetMainActivity"
+            android:configChanges="orientation"
+            android:label="@string/gpodnet_main_label">
+
+            <meta-data
+                android:name="android.app.default_searchable"
+                android:value="de.danoeh.antennapod.activity.gpoddernet.GpodnetSearchActivity"/>
+            <meta-data
+                android:name="android.app.searchable"
+                android:resource="@xml/gpodnet_searchable"/>
+            <meta-data
+                android:name="android.support.PARENT_ACTIVITY"
+                android:value="de.danoeh.antennapod.activity.AddFeedActivity" />
+
+        </activity>
+        <activity
+            android:name=".activity.gpoddernet.GpodnetTagActivity"
+            android:configChanges="orientation">
+            <meta-data
+                android:name="android.app.default_searchable"
+                android:value="de.danoeh.antennapod.activity.gpoddernet.GpodnetSearchActivity"/>
+            <meta-data
+                android:name="android.app.searchable"
+                android:resource="@xml/gpodnet_searchable"/>
+            <meta-data
+                android:name="android.support.PARENT_ACTIVITY"
+                android:value="de.danoeh.antennapod.activity.gpoddernet.GpodnetMainActivity" />
         </activity>
 
-        <receiver android:name=".receiver.ConnectivityActionReceiver" >
+        <activity
+            android:name=".activity.gpoddernet.GpodnetSearchActivity"
+            android:configChanges="orientation"
+            android:label="@string/search_label"
+            android:launchMode="singleTop">
             <intent-filter>
-                <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
+                <action android:name="android.intent.action.SEARCH"/>
+            </intent-filter>
+            <meta-data
+                android:name="android.app.searchable"
+                android:resource="@xml/gpodnet_searchable"/>
+            <meta-data
+                android:name="android.support.PARENT_ACTIVITY"
+                android:value="de.danoeh.antennapod.activity.gpoddernet.GpodnetMainActivity" />
+        </activity>
+
+        <activity
+            android:name=".activity.DefaultOnlineFeedViewActivity"
+            android:configChanges="orientation"/>
+
+        <activity
+            android:name=".activity.gpoddernet.GpodnetAuthenticationActivity"
+            android:configChanges="orientation"
+            android:label="@string/gpodnet_auth_label"
+            android:screenOrientation="portrait">
+            <intent-filter>
+                <action android:name=".activity.gpoddernet.GpodnetAuthenticationActivity"/>
+                <category android:name="android.intent.category.DEFAULT"/>
+            </intent-filter>
+            <meta-data
+                android:name="android.support.PARENT_ACTIVITY"
+                android:value="de.danoeh.antennapod.activity.PreferenceActivity" />
+        </activity>
+
+
+        <receiver android:name=".receiver.ConnectivityActionReceiver">
+            <intent-filter>
+                <action android:name="android.net.conn.CONNECTIVITY_CHANGE"/>
             </intent-filter>
         </receiver>
-        <receiver android:name=".receiver.AlarmUpdateReceiver" >
+        <receiver android:name=".receiver.AlarmUpdateReceiver">
             <intent-filter>
-                <action android:name="android.intent.action.BOOT_COMPLETED" />
+                <action android:name="android.intent.action.BOOT_COMPLETED"/>
             </intent-filter>
             <intent-filter>
-                <action android:name="android.intent.action.PACKAGE_REPLACED" />
+                <action android:name="android.intent.action.PACKAGE_REPLACED"/>
 
                 <data
                     android:path="de.danoeh.antennapod"
-                    android:scheme="package" />
+                    android:scheme="package"/>
             </intent-filter>
         </receiver>
     </application>
diff --git a/res/layout-v14/addfeed.xml b/res/layout-v14/addfeed.xml
index 14d3a2a67..5760bea95 100644
--- a/res/layout-v14/addfeed.xml
+++ b/res/layout-v14/addfeed.xml
@@ -1,20 +1,21 @@
 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="fill_parent"
-    android:layout_height="fill_parent"
-    android:orientation="vertical" >
+                android:layout_width="fill_parent"
+                android:layout_height="fill_parent"
+                android:orientation="vertical">
 
     <RelativeLayout
         android:id="@+id/footer"
         android:layout_width="fill_parent"
         android:layout_height="48dp"
-        android:layout_alignParentBottom="true" >
+        android:focusableInTouchMode="true"
+        android:layout_alignParentBottom="true">
 
         <View
             android:layout_width="match_parent"
             android:layout_height="1dip"
             android:layout_alignParentTop="true"
-            android:background="?android:attr/dividerVertical" />
+            android:background="?android:attr/dividerVertical"/>
 
         <View
             android:id="@+id/horizontal_divider"
@@ -24,7 +25,7 @@
             android:layout_centerHorizontal="true"
             android:layout_marginBottom="4dp"
             android:layout_marginTop="4dp"
-            android:background="?android:attr/dividerVertical" />
+            android:background="?android:attr/dividerVertical"/>
 
         <Button
             android:id="@+id/butCancel"
@@ -35,7 +36,7 @@
             android:layout_alignParentTop="true"
             android:layout_toLeftOf="@id/horizontal_divider"
             android:background="?android:attr/selectableItemBackground"
-            android:text="@string/cancel_label" />
+            android:text="@string/cancel_label"/>
 
         <Button
             android:id="@+id/butConfirm"
@@ -46,7 +47,7 @@
             android:layout_alignParentTop="true"
             android:layout_toRightOf="@id/horizontal_divider"
             android:background="?android:attr/selectableItemBackground"
-            android:text="@string/confirm_label" />
+            android:text="@string/confirm_label"/>
     </RelativeLayout>
 
     <ScrollView
@@ -54,21 +55,22 @@
         android:layout_height="0dp"
         android:layout_above="@id/footer"
         android:layout_alignParentTop="true"
-        android:scrollbars="vertical" >
+        android:scrollbars="vertical">
 
         <RelativeLayout
             android:layout_width="match_parent"
-            android:layout_height="wrap_content" >
+            android:layout_height="wrap_content">
 
             <TextView
                 android:id="@+id/txtvFeedurl"
                 android:layout_width="fill_parent"
                 android:layout_height="wrap_content"
                 android:layout_alignParentTop="true"
-                android:layout_margin="8dp"
-                android:focusable="true"
-                android:focusableInTouchMode="true"
-                android:text="@string/txtvfeedurl_label" />
+                android:layout_margin="16dp"
+                android:textSize="@dimen/text_size_large"
+                android:textColor="@color/bright_blue"
+                android:textStyle="italic"
+                android:text="@string/txtvfeedurl_label"/>
 
             <EditText
                 android:id="@+id/etxtFeedurl"
@@ -77,23 +79,35 @@
                 android:layout_below="@id/txtvFeedurl"
                 android:layout_margin="8dp"
                 android:hint="@string/feedurl_label"
-                android:inputType="textUri" />
+                android:inputType="textUri"/>
 
             <TextView
-                android:id="@+id/txtvBrowseMiroguide"
+                android:id="@+id/txtvPodcastDirectories"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_below="@id/etxtFeedurl"
                 android:layout_margin="8dp"
-                android:text="@string/txtv_browse_miroguide_label" />
+                android:textSize="@dimen/text_size_large"
+                android:textColor="@color/bright_blue"
+                android:textStyle="italic"
+                android:text="@string/podcastdirectories_label"/>
+
+            <Button
+                android:id="@+id/butBrowseGpoddernet"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_below="@id/txtvPodcastDirectories"
+                android:layout_margin="8dp"
+                android:text="@string/gpodnet_main_label"/>
 
             <Button
                 android:id="@+id/butBrowseMiroguide"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:layout_below="@id/txtvBrowseMiroguide"
+                android:layout_below="@id/butBrowseGpoddernet"
                 android:layout_margin="8dp"
-                android:text="@string/browse_miroguide_label" />
+                android:text="@string/miro_guide_label"/>
+
 
             <TextView
                 android:id="@+id/txtvOpmlImport"
@@ -101,17 +115,28 @@
                 android:layout_height="wrap_content"
                 android:layout_below="@id/butBrowseMiroguide"
                 android:layout_margin="8dp"
-                android:text="@string/opml_import_txtv_button_lable" />
+                android:textSize="@dimen/text_size_large"
+                android:textColor="@color/bright_blue"
+                android:textStyle="italic"
+                android:text="@string/opml_import_label"/>
+
+            <TextView
+                android:id="@+id/txtvOpmlImportExpl"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_below="@id/txtvOpmlImport"
+                android:layout_margin="8dp"
+                android:text="@string/opml_import_txtv_button_lable"/>
 
             <Button
                 android:id="@+id/butOpmlImport"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:layout_below="@id/txtvOpmlImport"
+                android:layout_below="@id/txtvOpmlImportExpl"
                 android:layout_marginBottom="8dp"
                 android:layout_marginLeft="8dp"
                 android:layout_marginRight="8dp"
-                android:text="@string/opml_import_label" />
+                android:text="@string/opml_import_label"/>
         </RelativeLayout>
     </ScrollView>
 
diff --git a/res/layout-v14/authentication_dialog.xml b/res/layout-v14/authentication_dialog.xml
new file mode 100644
index 000000000..ed05dab1c
--- /dev/null
+++ b/res/layout-v14/authentication_dialog.xml
@@ -0,0 +1,81 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+              android:layout_width="match_parent"
+              android:layout_height="match_parent"
+              android:orientation="vertical" >
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical" >
+
+        <EditText
+            android:id="@+id/etxtUsername"
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            android:layout_weight="1"
+            android:layout_margin="16dp"
+            android:hint="@string/username_label"/>
+
+        <EditText
+            android:id="@+id/etxtPassword"
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            android:layout_weight="1"
+            android:layout_margin="16dp"
+            android:inputType="textPassword"
+            android:hint="@string/password_label"/>
+
+        <CheckBox
+            android:id="@+id/chkSaveUsernamePassword"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_margin="16dp"
+            android:text="@string/save_username_password_label"/>
+    </LinearLayout>
+
+    <RelativeLayout
+        android:id="@+id/footer"
+        android:layout_width="fill_parent"
+        android:layout_height="48dp" >
+
+        <View
+            android:layout_width="match_parent"
+            android:layout_height="1dip"
+            android:layout_alignParentTop="true"
+            android:background="?android:attr/dividerVertical" />
+
+        <View
+            android:id="@+id/horizontal_divider"
+            android:layout_width="1dip"
+            android:layout_height="fill_parent"
+            android:layout_alignParentTop="true"
+            android:layout_centerHorizontal="true"
+            android:layout_marginBottom="4dp"
+            android:layout_marginTop="4dp"
+            android:background="?android:attr/dividerVertical" />
+
+        <Button
+            android:id="@+id/butCancel"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignParentBottom="true"
+            android:layout_alignParentLeft="true"
+            android:layout_alignParentTop="true"
+            android:layout_toLeftOf="@id/horizontal_divider"
+            android:background="?android:attr/selectableItemBackground"
+            android:text="@string/cancel_label" />
+
+        <Button
+            android:id="@+id/butConfirm"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignParentBottom="true"
+            android:layout_alignParentRight="true"
+            android:layout_alignParentTop="true"
+            android:layout_toRightOf="@id/horizontal_divider"
+            android:background="?android:attr/selectableItemBackground"
+            android:text="@string/confirm_label" />
+    </RelativeLayout>
+
+</LinearLayout>
\ No newline at end of file
diff --git a/res/layout/addfeed.xml b/res/layout/addfeed.xml
index 39552976b..bb72a2be1 100644
--- a/res/layout/addfeed.xml
+++ b/res/layout/addfeed.xml
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="fill_parent"
-    android:layout_height="fill_parent"
-    android:orientation="vertical" >
+                android:layout_width="fill_parent"
+                android:layout_height="fill_parent"
+                android:orientation="vertical">
 
     <LinearLayout
         android:id="@+id/footer"
@@ -10,21 +10,21 @@
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:layout_alignParentBottom="true"
-        android:orientation="horizontal" >
+        android:orientation="horizontal">
 
         <Button
             android:id="@+id/butConfirm"
             android:layout_width="0px"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:text="@string/confirm_label" />
+            android:text="@string/confirm_label"/>
 
         <Button
             android:id="@+id/butCancel"
             android:layout_width="0px"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:text="@string/cancel_label" />
+            android:text="@string/cancel_label"/>
     </LinearLayout>
 
     <ScrollView
@@ -32,21 +32,22 @@
         android:layout_height="0dp"
         android:layout_above="@id/footer"
         android:layout_alignParentTop="true"
-        android:scrollbars="vertical" >
+        android:scrollbars="vertical">
 
         <RelativeLayout
             android:layout_width="match_parent"
-            android:layout_height="wrap_content" >
+            android:layout_height="wrap_content">
 
             <TextView
                 android:id="@+id/txtvFeedurl"
                 android:layout_width="fill_parent"
                 android:layout_height="wrap_content"
                 android:layout_alignParentTop="true"
-                android:layout_margin="8dp"
-                android:focusable="true"
-                android:focusableInTouchMode="true"
-                android:text="@string/txtvfeedurl_label" />
+                android:layout_margin="16dp"
+                android:textSize="@dimen/text_size_large"
+                android:textColor="@color/bright_blue"
+                android:textStyle="italic"
+                android:text="@string/txtvfeedurl_label"/>
 
             <EditText
                 android:id="@+id/etxtFeedurl"
@@ -55,23 +56,35 @@
                 android:layout_below="@id/txtvFeedurl"
                 android:layout_margin="8dp"
                 android:hint="@string/feedurl_label"
-                android:inputType="textUri" />
+                android:inputType="textUri"/>
 
             <TextView
-                android:id="@+id/txtvBrowseMiroguide"
+                android:id="@+id/txtvPodcastDirectories"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_below="@id/etxtFeedurl"
                 android:layout_margin="8dp"
-                android:text="@string/txtv_browse_miroguide_label" />
+                android:textSize="@dimen/text_size_large"
+                android:textColor="@color/bright_blue"
+                android:textStyle="italic"
+                android:text="@string/podcastdirectories_label"/>
+
+            <Button
+                android:id="@+id/butBrowseGpoddernet"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_below="@id/txtvPodcastDirectories"
+                android:layout_margin="8dp"
+                android:text="@string/gpodnet_main_label"/>
 
             <Button
                 android:id="@+id/butBrowseMiroguide"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:layout_below="@id/txtvBrowseMiroguide"
+                android:layout_below="@id/butBrowseGpoddernet"
                 android:layout_margin="8dp"
-                android:text="@string/browse_miroguide_label" />
+                android:text="@string/miro_guide_label"/>
+
 
             <TextView
                 android:id="@+id/txtvOpmlImport"
@@ -79,17 +92,28 @@
                 android:layout_height="wrap_content"
                 android:layout_below="@id/butBrowseMiroguide"
                 android:layout_margin="8dp"
-                android:text="@string/opml_import_txtv_button_lable" />
+                android:textSize="@dimen/text_size_large"
+                android:textColor="@color/bright_blue"
+                android:textStyle="italic"
+                android:text="@string/opml_import_label"/>
+
+            <TextView
+                android:id="@+id/txtvOpmlImportExpl"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_below="@id/txtvOpmlImport"
+                android:layout_margin="8dp"
+                android:text="@string/opml_import_txtv_button_lable"/>
 
             <Button
                 android:id="@+id/butOpmlImport"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:layout_below="@id/txtvOpmlImport"
+                android:layout_below="@id/txtvOpmlImportExpl"
                 android:layout_marginBottom="8dp"
                 android:layout_marginLeft="8dp"
                 android:layout_marginRight="8dp"
-                android:text="@string/opml_import_label" />
+                android:text="@string/opml_import_label"/>
         </RelativeLayout>
     </ScrollView>
 
diff --git a/res/layout/authentication_dialog.xml b/res/layout/authentication_dialog.xml
new file mode 100644
index 000000000..82260eb43
--- /dev/null
+++ b/res/layout/authentication_dialog.xml
@@ -0,0 +1,62 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+              android:layout_width="match_parent"
+              android:layout_height="match_parent"
+              android:orientation="vertical">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical">
+
+        <EditText
+            android:id="@+id/etxtUsername"
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            android:layout_weight="1"
+            android:layout_margin="16dp"
+            android:hint="@string/username_label"/>
+
+        <EditText
+            android:id="@+id/etxtPassword"
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            android:layout_weight="1"
+            android:layout_margin="16dp"
+            android:inputType="textPassword"
+            android:hint="@string/password_label"/>
+
+        <CheckBox
+            android:id="@+id/chkSaveUsernamePassword"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_margin="16dp"
+            android:text="@string/save_username_password_label"/>
+
+
+    </LinearLayout>
+
+    <LinearLayout
+        style="@android:style/ButtonBar"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal">
+
+        <Button
+            android:id="@+id/butConfirm"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginRight="8dp"
+            android:text="@string/confirm_label"
+            android:layout_weight="1"/>
+
+        <Button
+            android:id="@+id/butCancel"
+            android:text="@string/cancel_label"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"/>
+    </LinearLayout>
+
+</LinearLayout>
\ No newline at end of file
diff --git a/res/layout/gpodnet_main.xml b/res/layout/gpodnet_main.xml
new file mode 100644
index 000000000..1017a6a65
--- /dev/null
+++ b/res/layout/gpodnet_main.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+              android:id="@+id/main_view"
+              android:layout_width="match_parent"
+              android:layout_height="match_parent"
+              android:orientation="vertical" >
+
+    <android.support.v4.view.ViewPager
+        android:id="@+id/viewpager"
+        android:layout_width="match_parent"
+        android:layout_height="0px"
+        android:layout_weight="1">
+        <android.support.v4.view.PagerTabStrip
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="top" />
+    </android.support.v4.view.ViewPager>
+
+</LinearLayout>
diff --git a/res/layout/gpodnet_podcast_list.xml b/res/layout/gpodnet_podcast_list.xml
new file mode 100644
index 000000000..e69c2dbee
--- /dev/null
+++ b/res/layout/gpodnet_podcast_list.xml
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+             xmlns:tools="http://schemas.android.com/tools"
+             android:layout_width="match_parent"
+             android:layout_height="match_parent">
+
+    <GridView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:id="@+id/gridView"
+        android:stretchMode="columnWidth"
+        android:numColumns="auto_fit"
+        android:verticalSpacing="4dp"
+        android:horizontalSpacing="4dp"
+        android:gravity="center"
+        android:columnWidth="200dp"
+        tools:listitem="@layout/gpodnet_podcast_listitem"/>
+
+    <ProgressBar
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:id="@+id/progressBar"
+        android:layout_gravity="center"
+        android:indeterminateOnly="true"/>
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:id="@+id/txtvError"
+        android:layout_gravity="center"
+        android:visibility="gone"
+        android:textSize="@dimen/text_size_small"/>
+</FrameLayout>
\ No newline at end of file
diff --git a/res/layout/gpodnet_podcast_listitem.xml b/res/layout/gpodnet_podcast_listitem.xml
new file mode 100644
index 000000000..f6ddb3bd8
--- /dev/null
+++ b/res/layout/gpodnet_podcast_listitem.xml
@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent">
+    <ImageView
+        android:id="@+id/imgvCover"
+        android:layout_width="@dimen/thumbnail_length_itemlist"
+        android:layout_height="@dimen/thumbnail_length_itemlist"
+        android:layout_alignParentLeft="true"
+        android:layout_centerVertical="true"
+        android:layout_marginRight="4dip"
+        android:adjustViewBounds="true"
+        android:cropToPadding="true"
+        android:scaleType="fitXY" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="@dimen/thumbnail_length_itemlist"
+        android:layout_centerVertical="true"
+        android:layout_toRightOf="@id/imgvCover"
+        android:layout_marginRight="8dp"
+        android:orientation="vertical" >
+
+        <TextView
+            android:id="@+id/txtvTitle"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:ellipsize="end"
+            android:maxLines="1"
+            android:textColor="?android:attr/textColorPrimary"
+            android:textSize="@dimen/text_size_small" />
+
+        <TextView
+            android:id="@+id/txtvDescription"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:maxLines="2"
+            android:ellipsize="end"
+            android:textColor="?android:attr/textColorTertiary"
+            android:textSize="@dimen/text_size_micro" />
+
+    </LinearLayout>
+</RelativeLayout>
\ No newline at end of file
diff --git a/res/layout/gpodnet_search.xml b/res/layout/gpodnet_search.xml
new file mode 100644
index 000000000..deb9cffd6
--- /dev/null
+++ b/res/layout/gpodnet_search.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+              android:layout_width="match_parent"
+              android:layout_height="match_parent"
+              android:orientation="vertical" >
+
+    <FrameLayout
+        android:id="@+id/searchListFragment"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+</LinearLayout>
\ No newline at end of file
diff --git a/res/layout/gpodnet_tag_activity.xml b/res/layout/gpodnet_tag_activity.xml
new file mode 100644
index 000000000..01feb216f
--- /dev/null
+++ b/res/layout/gpodnet_tag_activity.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+              android:layout_width="match_parent"
+              android:layout_height="match_parent"
+              android:orientation="vertical" >
+
+    <FrameLayout
+        android:id="@+id/taglistFragment"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+</LinearLayout>
\ No newline at end of file
diff --git a/res/layout/gpodnetauth_activity.xml b/res/layout/gpodnetauth_activity.xml
new file mode 100644
index 000000000..cd428fbdf
--- /dev/null
+++ b/res/layout/gpodnetauth_activity.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
+<ViewFlipper
+    android:id="@+id/viewflipper"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"/>
+</ScrollView>
\ No newline at end of file
diff --git a/res/layout/gpodnetauth_credentials.xml b/res/layout/gpodnetauth_credentials.xml
new file mode 100644
index 000000000..b66fc9414
--- /dev/null
+++ b/res/layout/gpodnetauth_credentials.xml
@@ -0,0 +1,85 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent">
+
+    <TextView
+        android:id="@id/txtvTitle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/gpodnetauth_login_title"
+        android:layout_alignParentTop="true"
+        android:textSize="@dimen/text_size_large"
+        android:layout_margin="16dp"
+        android:textColor="@color/bright_blue"
+        android:textStyle="italic"/>
+
+    <TextView
+        android:id="@id/txtvDescription"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/gpodnetauth_login_descr"
+        android:layout_below="@id/txtvTitle"
+        android:textSize="@dimen/text_size_medium"
+        android:textColor="?android:attr/textColorSecondary"
+        android:layout_margin="16dp"/>
+
+    <EditText
+        android:id="@+id/etxtUsername"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:hint="@string/username_label"
+        android:layout_below="@id/txtvDescription"
+        android:layout_margin="8dp"/>
+
+    <EditText
+        android:id="@+id/etxtPassword"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:hint="@string/password_label"
+        android:layout_below="@id/etxtUsername"
+        android:inputType="textPassword"
+        android:layout_margin="8dp"/>
+
+    <Button
+        android:id="@+id/butLogin"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_below="@id/etxtPassword"
+        android:layout_alignParentRight="true"
+        android:text="@string/gpodnetauth_login_butLabel"
+        android:layout_margin="8dp"/>
+
+    <TextView
+        android:id="@+id/txtvError"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_below="@id/etxtPassword"
+        android:layout_alignParentLeft="true"
+        android:layout_toLeftOf="@id/butLogin"
+        android:textColor="@color/download_failed_red"
+        android:textSize="@dimen/text_size_small"
+        android:maxLines="2"
+        android:ellipsize="end"
+        android:gravity="center"
+        android:layout_margin="16dp"/>
+
+    <ProgressBar
+        android:id="@+id/progBarLogin"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:visibility="gone"
+        android:layout_alignTop="@+id/butLogin"
+        android:layout_toLeftOf="@+id/butLogin"/>
+
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textSize="@dimen/text_size_medium"
+        android:textColor="?android:attr/textColorSecondary"
+        android:layout_margin="16dp"
+        android:text="@string/gpodnetauth_login_register"
+        android:autoLink="web"
+        android:layout_below="@id/butLogin"/>
+</RelativeLayout>
\ No newline at end of file
diff --git a/res/layout/gpodnetauth_device.xml b/res/layout/gpodnetauth_device.xml
new file mode 100644
index 000000000..ac08cb5ad
--- /dev/null
+++ b/res/layout/gpodnetauth_device.xml
@@ -0,0 +1,104 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent">
+
+    <TextView
+        android:id="@+id/txtvTitle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/gpodnetauth_device_title"
+        android:layout_alignParentTop="true"
+        android:textSize="@dimen/text_size_large"
+        android:layout_margin="16dp"
+        android:textColor="@color/bright_blue"
+        android:textStyle="italic"/>
+
+    <TextView
+        android:id="@+id/txtvDescription"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/gpodnetauth_device_descr"
+        android:layout_below="@id/txtvTitle"
+        android:textSize="@dimen/text_size_medium"
+        android:textColor="?android:attr/textColorSecondary"
+        android:layout_margin="16dp"/>
+
+    <EditText
+        android:id="@+id/etxtCaption"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:hint="@string/gpodnetauth_device_caption"
+        android:layout_below="@id/txtvDescription"
+        android:layout_margin="8dp"/>
+
+    <EditText
+        android:id="@+id/etxtDeviceID"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:hint="@string/gpodnetauth_device_deviceID"
+        android:layout_below="@id/etxtCaption"
+        android:layout_margin="8dp"/>
+
+    <Button
+        android:id="@+id/butCreateNewDevice"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="8dp"
+        android:layout_alignParentRight="true"
+        android:layout_below="@id/etxtDeviceID"
+        android:text="@string/gpodnetauth_device_butCreateNewDevice"/>
+
+    <TextView
+        android:id="@+id/txtvError"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentLeft="true"
+        android:layout_below="@id/etxtCaption"
+        android:layout_alignBottom="@id/butCreateNewDevice"
+        android:textColor="@color/download_failed_red"
+        android:layout_margin="16dp"
+        android:textSize="@dimen/text_size_medium"
+        />
+
+    <ProgressBar
+        android:id="@+id/progbarCreateDevice"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignTop="@id/butCreateNewDevice"
+        android:layout_toLeftOf="@id/butCreateNewDevice"
+        android:textColor="@color/download_failed_red"
+        android:textSize="@dimen/text_size_medium"
+        android:visibility="gone"
+        />
+
+    <TextView
+        android:id="@+id/txtvChooseExistingDevice"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/gpodnetauth_device_chooseExistingDevice"
+        android:layout_below="@id/butCreateNewDevice"
+        android:textSize="@dimen/text_size_medium"
+        android:textColor="?android:attr/textColorSecondary"
+        android:layout_margin="16dp"/>
+
+    <Button
+        android:id="@+id/butChooseExistingDevice"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:text="@string/gpodnetauth_device_butChoose"
+        android:layout_below="@+id/spinnerChooseDevice"
+        android:layout_alignLeft="@+id/butCreateNewDevice"
+        android:layout_alignRight="@+id/butCreateNewDevice"/>
+
+    <Spinner
+        android:id="@+id/spinnerChooseDevice"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_below="@id/txtvChooseExistingDevice"
+        android:layout_alignParentLeft="true"
+        android:layout_margin="8dp"
+        android:layout_alignParentRight="true"/>
+
+</RelativeLayout>
\ No newline at end of file
diff --git a/res/layout/gpodnetauth_finish.xml b/res/layout/gpodnetauth_finish.xml
new file mode 100644
index 000000000..3b0b10d04
--- /dev/null
+++ b/res/layout/gpodnetauth_finish.xml
@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent">
+
+    <TextView
+        android:id="@+id/txtvTitle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/gpodnetauth_finish_title"
+        android:layout_alignParentTop="true"
+        android:textSize="@dimen/text_size_large"
+        android:layout_margin="16dp"
+        android:textColor="@color/bright_blue"
+        android:textStyle="italic"/>
+
+    <TextView
+        android:id="@+id/txtvDescription"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/gpodnetauth_finish_descr"
+        android:layout_below="@id/txtvTitle"
+        android:textSize="@dimen/text_size_medium"
+        android:textColor="?android:attr/textColorSecondary"
+        android:layout_margin="16dp"/>
+
+    <Button
+        android:id="@+id/butSyncNow"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_below="@id/txtvDescription"
+        android:layout_margin="16dp"
+        android:text="@string/gpodnetauth_finish_butsyncnow"/>
+
+    <Button
+        android:id="@+id/butGoMainscreen"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_below="@id/butSyncNow"
+        android:layout_margin="16dp"
+        android:text="@string/gpodnetauth_finish_butgomainscreen"/>
+
+</RelativeLayout>
\ No newline at end of file
diff --git a/res/layout/itemdescription_listitem.xml b/res/layout/itemdescription_listitem.xml
new file mode 100644
index 000000000..d6a3f6a16
--- /dev/null
+++ b/res/layout/itemdescription_listitem.xml
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+              android:orientation="vertical"
+              android:layout_width="match_parent"
+              android:layout_height="match_parent">
+
+    <TextView
+        android:id="@+id/txtvTitle"
+        android:layout_margin="8dp"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:lines="1"
+        android:ellipsize="end"
+        android:textColor="?android:attr/textColorPrimary"
+        android:textSize="@dimen/text_size_small"/>
+
+    <TextView
+        android:id="@+id/txtvDescription"
+        android:layout_margin="8dp"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:lines="3"
+        android:ellipsize="end"
+        android:textColor="?android:attr/textColorTertiary"
+        android:textSize="@dimen/text_size_micro"/>
+</LinearLayout>
\ No newline at end of file
diff --git a/res/layout/onlinefeedview_header.xml b/res/layout/onlinefeedview_header.xml
new file mode 100644
index 000000000..6bbecde1e
--- /dev/null
+++ b/res/layout/onlinefeedview_header.xml
@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent">
+
+    <ImageView
+        android:id="@+id/imgvCover"
+        android:layout_width="@dimen/thumbnail_length_onlinefeedview"
+        android:layout_height="@dimen/thumbnail_length_onlinefeedview"
+        android:layout_alignParentLeft="true"
+        android:layout_alignParentTop="true"
+        android:layout_margin="4dp"/>
+
+    <TextView
+        android:id="@+id/txtvTitle"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:ellipsize="end"
+        android:gravity="center_vertical"
+        android:layout_alignTop="@id/imgvCover"
+        android:layout_toRightOf="@id/imgvCover"
+        android:layout_alignParentRight="true"
+        android:lines="1"
+        android:textColor="?android:attr/textColorPrimary"
+        android:textSize="@dimen/text_size_medium"
+        android:layout_margin="4dp"/>
+
+    <TextView
+        android:id="@+id/txtvAuthor"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="4dp"
+        android:layout_below="@id/txtvTitle"
+        android:layout_toRightOf="@id/imgvCover"
+        android:lines="1"
+        android:ellipsize="end"
+        android:textColor="?android:attr/textColorSecondary"
+        android:textSize="@dimen/text_size_small"/>
+
+    <Button
+        android:id="@+id/butSubscribe"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="4dp"
+        android:text="@string/subscribe_label"
+        android:layout_below="@id/txtvAuthor"
+        android:layout_alignParentRight="true"
+        />
+
+
+    <TextView
+        android:id="@+id/txtvDescription"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_below="@id/butSubscribe"
+        android:maxLines="3"
+        android:ellipsize="end"
+        android:textColor="?android:attr/textColorTertiary"
+        android:textSize="@dimen/text_size_micro"
+        android:paddingTop="16dp"
+        android:paddingBottom="16dp"
+        android:paddingLeft="8dp"
+        android:paddingRight="8dp"
+        android:layout_margin="4dp"/>
+</RelativeLayout>
\ No newline at end of file
diff --git a/res/values/arrays.xml b/res/values/arrays.xml
index 534b9df50..b0d6e66f1 100644
--- a/res/values/arrays.xml
+++ b/res/values/arrays.xml
@@ -81,7 +81,7 @@
         <item>3.90</item>
         <item>4.00</item>
     </string-array>
-    
+
     <string-array name="autodl_select_networks_default_entries">
         <item>N/A</item>
     </string-array>
@@ -96,6 +96,4 @@
         <item>0</item>
         <item>1</item>
     </string-array>
-    
-
 </resources>
\ No newline at end of file
diff --git a/res/values/colors.xml b/res/values/colors.xml
index 5cf84ec4a..7ce05bc13 100644
--- a/res/values/colors.xml
+++ b/res/values/colors.xml
@@ -28,7 +28,7 @@
     <color name="status_playing">#E0EE5F52</color>
     <color name="overlay_dark">#262C31</color>
     <color name="overlay_light">#DDDDDD</color>
-    
+
     <!-- Use Gingerbread-orange -->
     <color name="selection_background_color_dark">#FEBB20</color>
     <color name="selection_background_color_light">#FEBB20</color>
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index 3b7e7475a..8dea65a5b 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -12,4 +12,5 @@
     <dimen name="text_size_large">22sp</dimen>
     <dimen name="status_indicator_width">36dp</dimen>
 	<dimen name="thumbnail_length_itemlist">80dp</dimen>
+    <dimen name="thumbnail_length_onlinefeedview">110dp</dimen>
 </resources>
\ No newline at end of file
diff --git a/res/values/ids.xml b/res/values/ids.xml
index 4d393e675..5356cd119 100644
--- a/res/values/ids.xml
+++ b/res/values/ids.xml
@@ -15,5 +15,9 @@
     <item name="organize_queue_item" type="id"/>
     <item name="drag_handle" type="id"/>
     <item name="skip_episode_item" type="id"/>
+    <item name="image_disk_cache_key" type="id"/>
+    <item name="imageloader_key" type="id"/>
+    <item name="notification_gpodnet_sync_error" type="id"/>
+    <item name="notification_gpodnet_sync_autherror" type="id"/>
 
 </resources>
\ No newline at end of file
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 5895e7f55..a0da91420 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -17,6 +17,8 @@
     <string name="cancel_download_label">Cancel Download</string>
     <string name="download_log_label">Download log</string>
     <string name="playback_history_label">Playback history</string>
+    <string name="gpodnet_main_label">gpodder.net</string>
+    <string name="gpodnet_auth_label">gpodder.net login</string>
 
     <!-- Webview actions -->
     <string name="open_in_browser_label">Open in browser</string>
@@ -47,12 +49,14 @@
     <string name="processing_label">Processing</string>
     <string name="loading_label">Loading...</string>
     <string name="image_of_prefix">Image of:\u0020</string>
+    <string name="save_username_password_label">Save username and password</string>
     <string name="close_label">Close</string>
     
 
     <!-- 'Add Feed' Activity labels -->
     <string name="feedurl_label">Feed URL</string>
-    <string name="txtvfeedurl_label">Type in the URL of the Feed here:</string>
+    <string name="txtvfeedurl_label">Add Podcast by URL</string>
+    <string name="podcastdirectories_label">Podcast directories</string>
 
     <!-- Actions on feeds -->
     <string name="mark_all_read_label">Mark all as read</string>
@@ -160,6 +164,8 @@
     <string name="other_pref">Other</string>
     <string name="about_pref">About</string>
     <string name="queue_label">Queue</string>
+    <string name="services_label">Services</string>
+    <string name="flattr_label">Flattr</string>
     <string name="pref_pauseOnHeadsetDisconnect_sum">Pause playback when the headphones are disconnected</string>
     <string name="pref_followQueue_sum">Jump to next queue item when playback completes</string>
     <string name="playback_pref">Playback</string>
@@ -193,9 +199,15 @@
     <string name="pref_theme_title_light">Light</string>
     <string name="pref_theme_title_dark">Dark</string>
     <string name="pref_episode_cache_unlimited">Unlimited</string>
-    <string name="pref_update_interval_hours_plural">hours</string>
-    <string name="pref_update_interval_hours_singular">hour</string>
-    <string name="pref_update_interval_hours_manual">Manual</string>
+	<string name="pref_update_interval_hours_plural">hours</string>
+	<string name="pref_update_interval_hours_singular">hour</string>
+	<string name="pref_update_interval_hours_manual">Manual</string>
+    <string name="pref_gpodnet_authenticate_title">Login</string>
+    <string name="pref_gpodnet_authenticate_sum">Login with your gpodder.net account in order to sync your subscriptions.</string>
+    <string name="pref_gpodnet_logout_title">Logout</string>
+    <string name="pref_gpodnet_logout_toast">Logout was successful</string>
+    <string name="pref_gpodnet_setlogin_information_title">Change login information</string>
+    <string name="pref_gpodnet_setlogin_information_sum">Change the login information for your gpodder.net account.</string>
     <string name="pref_playback_speed_title">Playback Speeds</string>
     <string name="pref_playback_speed_sum">Customize the speeds available for variable speed audio playback</string>
    
@@ -248,6 +260,37 @@
     <string name="add_feed_label">Add feed</string>
     <string name="miro_feed_added">Feed is being added</string>
 
+    <!-- gpodder.net -->
+    <string name="gpodnet_taglist_header">CATEGORIES</string>
+    <string name="gpodnet_toplist_header">TOP PODCASTS</string>
+    <string name="gpodnet_suggestions_header">SUGGESTIONS</string>
+    <string name="gpodnet_search_hint">Search gpodder.net</string>
+    <string name="gpodnetauth_login_title">Login</string>
+    <string name="gpodnetauth_login_descr">Welcome to the gpodder.net login process. First, type in your login information:</string>
+    <string name="gpodnetauth_login_butLabel">Login</string>
+    <string name="gpodnetauth_login_register">If you do not have an account yet, you can create one here:\nhttps://gpodder.net/register/</string>
+    <string name="username_label">Username</string>
+    <string name="password_label">Password</string>
+    <string name="gpodnetauth_device_title">Device Selection</string>
+    <string name="gpodnetauth_device_descr">Create a new device to use for your gpodder.net account or choose an existing one:</string>
+    <string name="gpodnetauth_device_deviceID">Device ID</string>
+    <string name="gpodnetauth_device_caption">Caption</string>
+    <string name="gpodnetauth_device_butCreateNewDevice">Create new device</string>
+    <string name="gpodnetauth_device_chooseExistingDevice">Choose existring device:</string>
+    <string name="gpodnetauth_device_errorEmpty">Device ID must not be empty</string>
+    <string name="gpodnetauth_device_errorAlreadyUsed">Device ID already in use</string>
+
+    <string name="gpodnetauth_device_butChoose">Choose</string>
+    <string name="gpodnetauth_finish_title">Login successful!</string>
+    <string name="gpodnetauth_finish_descr">Congratulations! Your gpodder.net account is now linked with your device. AntennaPod will from now on automagically sync subscriptions on your device with your gpodder.net account.</string>
+    <string name="gpodnetauth_finish_butsyncnow">Start sync now</string>
+    <string name="gpodnetauth_finish_butgomainscreen">Go to main screen</string>
+
+    <string name="gpodnetsync_auth_error_title">gpodder.net authentication error</string>
+    <string name="gpodnetsync_auth_error_descr">Wrong username or password</string>
+    <string name="gpodnetsync_error_title">gpodder.net sync error</string>
+    <string name="gpodnetsync_error_descr">An error occurred during syncing:\u0020</string>
+
     <!-- Directory chooser -->
     <string name="selected_folder_label">Selected folder:</string>
     <string name="create_folder_label">Create folder</string>
@@ -261,4 +304,8 @@
     <string name="folder_not_empty_dialog_msg">The folder you have selected is not empty. Media downloads and other files will be placed directly in this folder. Continue anyway?</string>
     <string name="set_to_default_folder">Choose default folder</string>
 
-</resources>
+    <!-- Online feed view -->
+    <string name="subscribe_label">Subscribe</string>
+    <string name="subscribed_label">Subscribed</string>
+    <string name="downloading_label">Downloading...</string>
+</resources>
\ No newline at end of file
diff --git a/res/xml/gpodnet_searchable.xml b/res/xml/gpodnet_searchable.xml
new file mode 100644
index 000000000..d2c14d7f7
--- /dev/null
+++ b/res/xml/gpodnet_searchable.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<searchable xmlns:android="http://schemas.android.com/apk/res/android" android:hint="@string/gpodnet_search_hint" android:label="@string/app_name" android:icon="@drawable/ic_launcher">
+
+
+</searchable>
\ No newline at end of file
diff --git a/res/xml/preferences.xml b/res/xml/preferences.xml
index 34916a8fc..099ad27e9 100644
--- a/res/xml/preferences.xml
+++ b/res/xml/preferences.xml
@@ -1,73 +1,127 @@
 <?xml version="1.0" encoding="utf-8"?>
-<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
 
     <PreferenceCategory android:title="@string/user_interface_label">
-        <!--<CheckBoxPreference android:title="@string/pref_display_only_episodes_title" android:summary="@string/pref_display_only_episodes_sum" android:key="prefDisplayOnlyEpisodes" android:visibility="gone"/>-->
-        <ListPreference android:entryValues="@array/theme_values" android:entries="@array/theme_options" android:title="@string/pref_set_theme_title" android:key="prefTheme" android:summary="@string/pref_set_theme_sum" android:defaultValue="0"/>
-    </PreferenceCategory><PreferenceCategory android:title="@string/playback_pref" >
+        <CheckBoxPreference
+            android:title="@string/pref_display_only_episodes_title"
+            android:summary="@string/pref_display_only_episodes_sum"
+            android:key="prefDisplayOnlyEpisodes"/>
+        <ListPreference
+            android:entryValues="@array/theme_values"
+            android:entries="@array/theme_options"
+            android:title="@string/pref_set_theme_title"
+            android:key="prefTheme"
+            android:summary="@string/pref_set_theme_sum"
+            android:defaultValue="0"/>
+    </PreferenceCategory>
+    <PreferenceCategory android:title="@string/playback_pref">
         <CheckBoxPreference
             android:defaultValue="true"
             android:enabled="true"
             android:key="prefPauseOnHeadsetDisconnect"
             android:summary="@string/pref_pauseOnHeadsetDisconnect_sum"
-            android:title="@string/pref_pauseOnHeadsetDisconnect_title" />
+            android:title="@string/pref_pauseOnHeadsetDisconnect_title"/>
         <CheckBoxPreference
             android:defaultValue="false"
             android:enabled="true"
             android:key="prefFollowQueue"
             android:summary="@string/pref_followQueue_sum"
-            android:title="@string/pref_followQueue_title" />
+            android:title="@string/pref_followQueue_title"/>
         <Preference
             android:key="prefPlaybackSpeedLauncher"
             android:summary="@string/pref_playback_speed_sum"
             android:title="@string/pref_playback_speed_title" />
-        
     </PreferenceCategory>
-    <PreferenceCategory android:title="@string/network_pref" >
+    <PreferenceCategory android:title="@string/network_pref">
         <ListPreference
             android:defaultValue="0"
             android:entries="@array/update_intervall_values"
             android:entryValues="@array/update_intervall_values"
             android:key="prefAutoUpdateIntervall"
             android:summary="@string/pref_autoUpdateIntervall_sum"
-            android:title="@string/pref_autoUpdateIntervall_title" />
+            android:title="@string/pref_autoUpdateIntervall_title"/>
 
         <CheckBoxPreference
             android:defaultValue="false"
             android:enabled="true"
             android:key="prefMobileUpdate"
             android:summary="@string/pref_mobileUpdate_sum"
-            android:title="@string/pref_mobileUpdate_title" />
-        <ListPreference android:defaultValue="20" android:entries="@array/episode_cache_size_entries" android:key="prefEpisodeCacheSize" android:title="@string/pref_episode_cache_title" android:entryValues="@array/episode_cache_size_values"/><PreferenceScreen android:summary="@string/pref_automatic_download_sum" android:key="prefAutoDownloadSettings" android:title="@string/pref_automatic_download_title">
-            <CheckBoxPreference android:key="prefEnableAutoDl" android:title="@string/pref_automatic_download_title" android:defaultValue="false"/><CheckBoxPreference android:key="prefEnableAutoDownloadWifiFilter" android:title="@string/pref_autodl_wifi_filter_title" android:summary="@string/pref_autodl_wifi_filter_sum"/>
-            
-        </PreferenceScreen>
-        
-    </PreferenceCategory>
-    <PreferenceCategory android:title="@string/flattr_settings_label" >
+            android:title="@string/pref_mobileUpdate_title"/>
+        <ListPreference
+            android:defaultValue="20"
+            android:entries="@array/episode_cache_size_entries"
+            android:key="prefEpisodeCacheSize"
+            android:title="@string/pref_episode_cache_title"
+            android:entryValues="@array/episode_cache_size_values"/>
         <PreferenceScreen
-            android:key="pref_flattr_authenticate"
-            android:summary="@string/pref_flattr_auth_sum"
-            android:title="@string/pref_flattr_auth_title" >
-            <intent android:action=".activities.FlattrAuthActivity" />
+            android:summary="@string/pref_automatic_download_sum"
+            android:key="prefAutoDownloadSettings"
+            android:title="@string/pref_automatic_download_title">
+            <CheckBoxPreference
+                android:key="prefEnableAutoDl"
+                android:title="@string/pref_automatic_download_title"
+                android:defaultValue="false"/>
+            <CheckBoxPreference
+                android:key="prefEnableAutoDownloadWifiFilter"
+                android:title="@string/pref_autodl_wifi_filter_title"
+                android:summary="@string/pref_autodl_wifi_filter_sum"/>
+
         </PreferenceScreen>
 
-        <Preference
-            android:key="prefRevokeAccess"
-            android:summary="@string/pref_revokeAccess_sum"
-            android:title="@string/pref_revokeAccess_title" />
     </PreferenceCategory>
-    <PreferenceCategory android:title="@string/other_pref" >
-        <Preference android:title="@string/choose_data_directory" android:key="prefChooseDataDir"/><Preference
+    <PreferenceCategory android:title="@string/services_label">
+        <PreferenceScreen
+            android:key="prefFlattrSettings"
+            android:title="@string/flattr_label">
+            <PreferenceScreen
+                android:key="pref_flattr_authenticate"
+                android:summary="@string/pref_flattr_auth_sum"
+                android:title="@string/pref_flattr_auth_title">
+                <intent android:action=".activities.FlattrAuthActivity"/>
+            </PreferenceScreen>
+
+            <Preference
+                android:key="prefRevokeAccess"
+                android:summary="@string/pref_revokeAccess_sum"
+                android:title="@string/pref_revokeAccess_title"/>
+        </PreferenceScreen>
+        <PreferenceScreen
+            android:key="prefFlattrSettings"
+            android:title="@string/gpodnet_main_label">
+
+            <PreferenceScreen
+                android:key="pref_gpodnet_authenticate"
+                android:title="@string/pref_gpodnet_authenticate_title"
+                android:summary="@string/pref_gpodnet_authenticate_sum">
+                <intent android:action=".activity.gpoddernet.GpodnetAuthenticationActivity"/>
+            </PreferenceScreen>
+            <Preference
+                android:key="pref_gpodnet_setlogin_information"
+                android:title="@string/pref_gpodnet_setlogin_information_title"
+                android:summary="@string/pref_gpodnet_setlogin_information_sum"/>
+            <Preference
+                android:key="pref_gpodnet_logout"
+                android:title="@string/pref_gpodnet_logout_title"/>
+        </PreferenceScreen>
+
+    </PreferenceCategory>
+    <PreferenceCategory android:title="@string/other_pref">
+        <Preference
+            android:title="@string/choose_data_directory"
+            android:key="prefChooseDataDir"/>
+        <Preference
             android:key="prefFlattrThisApp"
             android:summary="@string/pref_flattr_this_app_sum"
-            android:title="@string/pref_flattr_this_app_title" >
+            android:title="@string/pref_flattr_this_app_title">
         </Preference>
-        <Preference android:key="prefOpmlExport" android:title="@string/opml_export_label"/><Preference
+        <Preference
+            android:key="prefOpmlExport"
+            android:title="@string/opml_export_label"/>
+        <Preference
             android:key="prefAbout"
-            android:title="@string/about_pref" />
-        
-        
+            android:title="@string/about_pref"/>
+
+
     </PreferenceCategory>
 
 </PreferenceScreen>
\ No newline at end of file
diff --git a/src/de/danoeh/antennapod/AppConfig.java b/src/de/danoeh/antennapod/AppConfig.java
index 6caea4127..e79eb64e8 100644
--- a/src/de/danoeh/antennapod/AppConfig.java
+++ b/src/de/danoeh/antennapod/AppConfig.java
@@ -3,4 +3,6 @@ package de.danoeh.antennapod;
 public final class AppConfig {
 	/** Should be used for debug logging. */
 	public final static boolean DEBUG = true;
+    /** Should be used when setting User-Agent header for HTTP-requests. */
+    public final static String USER_AGENT = "AntennaPod/0.9.8.0";
 }
diff --git a/src/de/danoeh/antennapod/activity/AddFeedActivity.java b/src/de/danoeh/antennapod/activity/AddFeedActivity.java
index 4085fc8d2..ad1adfa6b 100644
--- a/src/de/danoeh/antennapod/activity/AddFeedActivity.java
+++ b/src/de/danoeh/antennapod/activity/AddFeedActivity.java
@@ -5,6 +5,7 @@ import java.util.Date;
 import android.support.v7.app.ActionBarActivity;
 import android.view.Menu;
 import android.view.MenuItem;
+import de.danoeh.antennapod.activity.gpoddernet.GpodnetMainActivity;
 import org.apache.commons.lang3.StringUtils;
 
 import android.app.AlertDialog;
@@ -37,6 +38,7 @@ public class AddFeedActivity extends ActionBarActivity {
 
 	private EditText etxtFeedurl;
 	private Button butBrowseMiroGuide;
+    private Button butBrowserGpoddernet;
 	private Button butOpmlImport;
 	private Button butConfirm;
 	private Button butCancel;
@@ -63,6 +65,7 @@ public class AddFeedActivity extends ActionBarActivity {
 		}
 
 		butBrowseMiroGuide = (Button) findViewById(R.id.butBrowseMiroguide);
+        butBrowserGpoddernet = (Button) findViewById(R.id.butBrowseGpoddernet);
 		butOpmlImport = (Button) findViewById(R.id.butOpmlImport);
 		butConfirm = (Button) findViewById(R.id.butConfirm);
 		butCancel = (Button) findViewById(R.id.butCancel);
@@ -75,6 +78,13 @@ public class AddFeedActivity extends ActionBarActivity {
 						MiroGuideMainActivity.class));
 			}
 		});
+        butBrowserGpoddernet.setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                startActivity(new Intent(AddFeedActivity.this,
+                        GpodnetMainActivity.class));
+            }
+        });
 
 		butOpmlImport.setOnClickListener(new OnClickListener() {
 
diff --git a/src/de/danoeh/antennapod/activity/DefaultOnlineFeedViewActivity.java b/src/de/danoeh/antennapod/activity/DefaultOnlineFeedViewActivity.java
new file mode 100644
index 000000000..bb56b1d12
--- /dev/null
+++ b/src/de/danoeh/antennapod/activity/DefaultOnlineFeedViewActivity.java
@@ -0,0 +1,164 @@
+package de.danoeh.antennapod.activity;
+
+import android.content.Context;
+import android.os.AsyncTask;
+import android.os.Bundle;
+import android.support.v4.app.NavUtils;
+import android.view.LayoutInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.Button;
+import android.widget.ImageView;
+import android.widget.ListView;
+import android.widget.TextView;
+import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.adapter.FeedItemlistDescriptionAdapter;
+import de.danoeh.antennapod.asynctask.ImageDiskCache;
+import de.danoeh.antennapod.dialog.DownloadRequestErrorDialogCreator;
+import de.danoeh.antennapod.feed.EventDistributor;
+import de.danoeh.antennapod.feed.Feed;
+import de.danoeh.antennapod.storage.DBReader;
+import de.danoeh.antennapod.storage.DownloadRequestException;
+import de.danoeh.antennapod.storage.DownloadRequester;
+
+import java.util.Date;
+import java.util.List;
+
+/**
+ * Created by daniel on 24.08.13.
+ */
+public class DefaultOnlineFeedViewActivity extends OnlineFeedViewActivity {
+
+    private static final int EVENTS = EventDistributor.DOWNLOAD_HANDLED | EventDistributor.DOWNLOAD_QUEUED | EventDistributor.FEED_LIST_UPDATE;
+    private volatile List<Feed> feeds;
+    private Feed feed;
+
+    private Button subscribeButton;
+
+    @Override
+    protected void onCreate(Bundle arg0) {
+        super.onCreate(arg0);
+        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case android.R.id.home:
+                finish();
+                return true;
+        }
+        return super.onOptionsItemSelected(item);
+    }
+
+    @Override
+    protected void loadData() {
+        super.loadData();
+        feeds = DBReader.getFeedList(this);
+    }
+
+    @Override
+    protected void showFeedInformation(final Feed feed) {
+        super.showFeedInformation(feed);
+        setContentView(R.layout.listview_activity);
+
+        this.feed = feed;
+        EventDistributor.getInstance().register(listener);
+        ListView listView = (ListView) findViewById(R.id.listview);
+        LayoutInflater inflater = (LayoutInflater)
+                getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+        View header = inflater.inflate(R.layout.onlinefeedview_header, null);
+        listView.addHeaderView(header);
+
+        listView.setAdapter(new FeedItemlistDescriptionAdapter(this, 0, feed.getItems()));
+
+        ImageView cover = (ImageView) header.findViewById(R.id.imgvCover);
+        TextView title = (TextView) header.findViewById(R.id.txtvTitle);
+        TextView author = (TextView) header.findViewById(R.id.txtvAuthor);
+        TextView description = (TextView) header.findViewById(R.id.txtvDescription);
+        subscribeButton = (Button) header.findViewById(R.id.butSubscribe);
+
+        if (feed.getImage() != null) {
+            ImageDiskCache.getDefaultInstance().loadThumbnailBitmap(feed.getImage().getDownload_url(), cover, (int) getResources().getDimension(
+                    R.dimen.thumbnail_length));
+        }
+        title.setText(feed.getTitle());
+        author.setText(feed.getAuthor());
+        description.setText(feed.getDescription());
+
+        subscribeButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                try {
+                    DownloadRequester.getInstance().downloadFeed(
+                            DefaultOnlineFeedViewActivity.this,
+                            new Feed(feed.getDownload_url(), new Date(), feed
+                                    .getTitle()));
+                } catch (DownloadRequestException e) {
+                    e.printStackTrace();
+                    DownloadRequestErrorDialogCreator.newRequestErrorDialog(DefaultOnlineFeedViewActivity.this,
+                            e.getMessage());
+                }
+                setSubscribeButtonState(feed);
+            }
+        });
+        setSubscribeButtonState(feed);
+
+    }
+
+    private boolean feedInFeedlist(Feed feed) {
+        if (feeds == null || feed == null)
+            return false;
+        for (Feed f : feeds) {
+            if (f.getIdentifyingValue().equals(feed.getIdentifyingValue())) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private void setSubscribeButtonState(Feed feed) {
+        if (subscribeButton != null && feed != null) {
+            if (DownloadRequester.getInstance().isDownloadingFile(feed.getDownload_url())) {
+                subscribeButton.setEnabled(false);
+                subscribeButton.setText(R.string.downloading_label);
+            } else if (feedInFeedlist(feed)) {
+                subscribeButton.setEnabled(false);
+                subscribeButton.setText(R.string.subscribed_label);
+            } else {
+                subscribeButton.setEnabled(true);
+                subscribeButton.setText(R.string.subscribe_label);
+            }
+        }
+    }
+
+    EventDistributor.EventListener listener = new EventDistributor.EventListener() {
+        @Override
+        public void update(EventDistributor eventDistributor, Integer arg) {
+            if ((arg & EventDistributor.FEED_LIST_UPDATE) != 0) {
+                new AsyncTask<Void, Void, List<Feed>>() {
+                    @Override
+                    protected List<Feed> doInBackground(Void... params) {
+                        return DBReader.getFeedList(DefaultOnlineFeedViewActivity.this);
+                    }
+
+                    @Override
+                    protected void onPostExecute(List<Feed> feeds) {
+                        super.onPostExecute(feeds);
+                        DefaultOnlineFeedViewActivity.this.feeds = feeds;
+                        setSubscribeButtonState(feed);
+                    }
+                }.execute();
+            } else if ((arg & EVENTS) != 0) {
+                setSubscribeButtonState(feed);
+            }
+        }
+    };
+
+    @Override
+    protected void onStop() {
+        super.onStop();
+        EventDistributor.getInstance().unregister(listener);
+    }
+}
+
diff --git a/src/de/danoeh/antennapod/activity/OnlineFeedViewActivity.java b/src/de/danoeh/antennapod/activity/OnlineFeedViewActivity.java
index fbac7057d..84aa2d26b 100644
--- a/src/de/danoeh/antennapod/activity/OnlineFeedViewActivity.java
+++ b/src/de/danoeh/antennapod/activity/OnlineFeedViewActivity.java
@@ -1,23 +1,15 @@
 package de.danoeh.antennapod.activity;
 
-import java.io.File;
-import java.io.IOException;
-import java.util.Date;
-
-import javax.xml.parsers.ParserConfigurationException;
-
-import android.support.v7.app.ActionBarActivity;
-import org.xml.sax.SAXException;
-
 import android.app.AlertDialog;
 import android.content.DialogInterface;
 import android.content.DialogInterface.OnCancelListener;
 import android.os.Bundle;
+import android.support.v7.app.ActionBarActivity;
 import android.util.Log;
 import android.view.Gravity;
 import android.widget.LinearLayout;
 import android.widget.ProgressBar;
-
+import android.widget.RelativeLayout;
 import de.danoeh.antennapod.AppConfig;
 import de.danoeh.antennapod.R;
 import de.danoeh.antennapod.feed.Feed;
@@ -25,7 +17,6 @@ import de.danoeh.antennapod.preferences.UserPreferences;
 import de.danoeh.antennapod.service.download.DownloadRequest;
 import de.danoeh.antennapod.service.download.DownloadStatus;
 import de.danoeh.antennapod.service.download.Downloader;
-import de.danoeh.antennapod.service.download.DownloaderCallback;
 import de.danoeh.antennapod.service.download.HttpDownloader;
 import de.danoeh.antennapod.syndication.handler.FeedHandler;
 import de.danoeh.antennapod.syndication.handler.UnsupportedFeedtypeException;
@@ -33,207 +24,238 @@ import de.danoeh.antennapod.util.DownloadError;
 import de.danoeh.antennapod.util.FileNameGenerator;
 import de.danoeh.antennapod.util.StorageUtils;
 import de.danoeh.antennapod.util.URLChecker;
+import org.xml.sax.SAXException;
+
+import javax.xml.parsers.ParserConfigurationException;
+import java.io.File;
+import java.io.IOException;
+import java.util.Date;
 
 /**
  * Downloads a feed from a feed URL and parses it. Subclasses can display the
  * feed object that was parsed. This activity MUST be started with a given URL
  * or an Exception will be thrown.
- * 
+ * <p/>
  * If the feed cannot be downloaded or parsed, an error dialog will be displayed
  * and the activity will finish as soon as the error dialog is closed.
  */
 public abstract class OnlineFeedViewActivity extends ActionBarActivity {
-	private static final String TAG = "OnlineFeedViewActivity";
-	private static final String ARG_FEEDURL = "arg.feedurl";
+    private static final String TAG = "OnlineFeedViewActivity";
+    public static final String ARG_FEEDURL = "arg.feedurl";
 
-	public static final int RESULT_ERROR = 2;
+    /** Optional argument: specify a title for the actionbar. */
+    public static final String ARG_TITLE = "title";
 
-	private Feed feed;
-	private Downloader downloader;
+    public static final int RESULT_ERROR = 2;
 
-	@Override
-	protected void onCreate(Bundle arg0) {
-		setTheme(UserPreferences.getTheme());
-		super.onCreate(arg0);
-		StorageUtils.checkStorageAvailability(this);
-		final String feedUrl = getIntent().getStringExtra(ARG_FEEDURL);
-		if (feedUrl == null) {
-			throw new IllegalArgumentException(
-					"Activity must be started with feedurl argument!");
-		}
-		if (AppConfig.DEBUG)
-			Log.d(TAG, "Activity was started with url " + feedUrl);
-		setLoadingLayout();
-		startFeedDownload(feedUrl);
-	}
+    private Feed feed;
+    private Downloader downloader;
 
-	@Override
-	protected void onStop() {
-		super.onStop();
-		if (downloader != null && !downloader.isFinished()) {
-			downloader.cancel();
-		}
-	}
+    @Override
+    protected void onCreate(Bundle arg0) {
+        setTheme(UserPreferences.getTheme());
+        super.onCreate(arg0);
 
-	private DownloaderCallback downloaderCallback = new DownloaderCallback() {
-		@Override
-		public void onDownloadCompleted(final Downloader downloader) {
-			runOnUiThread(new Runnable() {
+        if (getIntent() != null && getIntent().hasExtra(ARG_TITLE)) {
+            getSupportActionBar().setTitle(getIntent().getStringExtra(ARG_TITLE));
+        }
 
-				@Override
-				public void run() {
-					DownloadStatus status = downloader.getResult();
-					if (status != null) {
-						if (!status.isCancelled()) {
-							if (status.isSuccessful()) {
-								parseFeed();
-							} else {
-								String errorMsg = status.getReason().getErrorString(
-										OnlineFeedViewActivity.this);
-								if (errorMsg != null
-										&& status.getReasonDetailed() != null) {
-									errorMsg += " ("
-											+ status.getReasonDetailed() + ")";
-								}
-								showErrorDialog(errorMsg);
-							}
-						}
-					} else {
-						Log.wtf(TAG,
-								"DownloadStatus returned by Downloader was null");
-						finish();
-					}
-				}
-			});
+        StorageUtils.checkStorageAvailability(this);
+        final String feedUrl = getIntent().getStringExtra(ARG_FEEDURL);
+        if (feedUrl == null) {
+            throw new IllegalArgumentException(
+                    "Activity must be started with feedurl argument!");
+        }
+        if (AppConfig.DEBUG)
+            Log.d(TAG, "Activity was started with url " + feedUrl);
+        setLoadingLayout();
+        startFeedDownload(feedUrl);
+    }
 
-		}
-	};
+    @Override
+    protected void onStop() {
+        super.onStop();
+        if (downloader != null && !downloader.isFinished()) {
+            downloader.cancel();
+        }
+    }
 
-	private void startFeedDownload(String url) {
-		if (AppConfig.DEBUG)
-			Log.d(TAG, "Starting feed download");
-		url = URLChecker.prepareURL(url);
-		feed = new Feed(url, new Date());
-		String fileUrl = new File(getExternalCacheDir(),
-				FileNameGenerator.generateFileName(feed.getDownload_url()))
-				.toString();
-		feed.setFile_url(fileUrl);
-		DownloadRequest request = new DownloadRequest(feed.getFile_url(),
-				feed.getDownload_url(), "OnlineFeed", 0, Feed.FEEDFILETYPE_FEED);
-        /* TODO update
-		HttpDownloader httpDownloader = new HttpDownloader(downloaderCallback,
-				request);
-		httpDownloader.start();
-		*/
-	}
 
-	/** Displays a progress indicator. */
-	private void setLoadingLayout() {
-		LinearLayout ll = new LinearLayout(this);
-		LinearLayout.LayoutParams llLayoutParams = new LinearLayout.LayoutParams(
-				LinearLayout.LayoutParams.MATCH_PARENT,
-				LinearLayout.LayoutParams.MATCH_PARENT);
+    private void onDownloadCompleted(final Downloader downloader) {
+        runOnUiThread(new Runnable() {
 
-		ProgressBar pb = new ProgressBar(this);
-		pb.setIndeterminate(true);
-		LinearLayout.LayoutParams pbLayoutParams = new LinearLayout.LayoutParams(
-				LinearLayout.LayoutParams.WRAP_CONTENT,
-				LinearLayout.LayoutParams.WRAP_CONTENT);
-		pbLayoutParams.gravity = Gravity.CENTER;
-		ll.addView(pb, pbLayoutParams);
-		addContentView(ll, llLayoutParams);
-	}
+            @Override
+            public void run() {
+                if (AppConfig.DEBUG) Log.d(TAG, "Download was completed");
+                DownloadStatus status = downloader.getResult();
+                if (status != null) {
+                    if (!status.isCancelled()) {
+                        if (status.isSuccessful()) {
+                            parseFeed();
+                        } else {
+                            String errorMsg = status.getReason().getErrorString(
+                                    OnlineFeedViewActivity.this);
+                            if (errorMsg != null
+                                    && status.getReasonDetailed() != null) {
+                                errorMsg += " ("
+                                        + status.getReasonDetailed() + ")";
+                            }
+                            showErrorDialog(errorMsg);
+                        }
+                    }
+                } else {
+                    Log.wtf(TAG,
+                            "DownloadStatus returned by Downloader was null");
+                    finish();
+                }
+            }
+        });
 
-	private void parseFeed() {
-		if (feed == null || feed.getFile_url() == null) {
-			throw new IllegalStateException(
-					"feed must be non-null and downloaded when parseFeed is called");
-		}
+    }
 
-		if (AppConfig.DEBUG)
-			Log.d(TAG, "Parsing feed");
+    private void startFeedDownload(String url) {
+        if (AppConfig.DEBUG)
+            Log.d(TAG, "Starting feed download");
+        url = URLChecker.prepareURL(url);
+        feed = new Feed(url, new Date());
+        String fileUrl = new File(getExternalCacheDir(),
+                FileNameGenerator.generateFileName(feed.getDownload_url()))
+                .toString();
+        feed.setFile_url(fileUrl);
+        final DownloadRequest request = new DownloadRequest(feed.getFile_url(),
+                feed.getDownload_url(), "OnlineFeed", 0, Feed.FEEDFILETYPE_FEED);
+        downloader = new HttpDownloader(
+                request);
+        new Thread() {
+            @Override
+            public void run() {
+                loadData();
+                downloader.call();
+                onDownloadCompleted(downloader);
+            }
+        }.start();
 
-		Thread thread = new Thread() {
 
-			@Override
-			public void run() {
-				String reasonDetailed = "";
-				boolean successful = false;
-				FeedHandler handler = new FeedHandler();
-				try {
-					handler.parseFeed(feed);
-					successful = true;
-				} catch (SAXException e) {
-					e.printStackTrace();
-					reasonDetailed = e.getMessage();
-				} catch (IOException e) {
-					e.printStackTrace();
-					reasonDetailed = e.getMessage();
-				} catch (ParserConfigurationException e) {
-					e.printStackTrace();
-					reasonDetailed = e.getMessage();
-				} catch (UnsupportedFeedtypeException e) {
-					e.printStackTrace();
-					reasonDetailed = e.getMessage();
-				} finally {
-					boolean rc = new File(feed.getFile_url()).delete();
-					if (AppConfig.DEBUG)
-						Log.d(TAG, "Deleted feed source file. Result: " + rc);
-				}
+    }
 
-				if (successful) {
-					runOnUiThread(new Runnable() {
-						@Override
-						public void run() {
-							showFeedInformation();
-						}
-					});
-				} else {
-					final String errorMsg =
-							DownloadError.ERROR_PARSER_EXCEPTION.getErrorString(
-							OnlineFeedViewActivity.this)
-							+ " (" + reasonDetailed + ")";
-					runOnUiThread(new Runnable() {
+    /**
+     * Displays a progress indicator.
+     */
+    private void setLoadingLayout() {
+        RelativeLayout rl = new RelativeLayout(this);
+        RelativeLayout.LayoutParams rlLayoutParams = new RelativeLayout.LayoutParams(
+                LinearLayout.LayoutParams.MATCH_PARENT,
+                LinearLayout.LayoutParams.MATCH_PARENT);
 
-						@Override
-						public void run() {
-							showErrorDialog(errorMsg);
-						}
-					});
-				}
-			}
-		};
-		thread.start();
-	}
+        ProgressBar pb = new ProgressBar(this);
+        pb.setIndeterminate(true);
+        RelativeLayout.LayoutParams pbLayoutParams = new RelativeLayout.LayoutParams(
+                LinearLayout.LayoutParams.WRAP_CONTENT,
+                LinearLayout.LayoutParams.WRAP_CONTENT);
+        pbLayoutParams.addRule(RelativeLayout.CENTER_IN_PARENT);
+        rl.addView(pb, pbLayoutParams);
+        addContentView(rl, rlLayoutParams);
+    }
 
-	/** Called when feed parsed successfully */
-	protected void showFeedInformation() {
+    private void parseFeed() {
+        if (feed == null || feed.getFile_url() == null) {
+            throw new IllegalStateException(
+                    "feed must be non-null and downloaded when parseFeed is called");
+        }
 
-	}
+        if (AppConfig.DEBUG)
+            Log.d(TAG, "Parsing feed");
 
-	private void showErrorDialog(String errorMsg) {
-		AlertDialog.Builder builder = new AlertDialog.Builder(this);
-		builder.setTitle(R.string.error_label);
-		if (errorMsg != null) {
-			builder.setMessage(getString(R.string.error_msg_prefix) + errorMsg);
-		} else {
-			builder.setMessage(R.string.error_msg_prefix);
-		}
-		builder.setNeutralButton(android.R.string.ok,
-				new DialogInterface.OnClickListener() {
+        Thread thread = new Thread() {
 
-					@Override
-					public void onClick(DialogInterface dialog, int which) {
-						dialog.cancel();
-					}
-				});
-		builder.setOnCancelListener(new OnCancelListener() {
-			@Override
-			public void onCancel(DialogInterface dialog) {
-				setResult(RESULT_ERROR);
-				finish();
-			}
-		});
-	}
+            @Override
+            public void run() {
+                String reasonDetailed = "";
+                boolean successful = false;
+                FeedHandler handler = new FeedHandler();
+                try {
+                    handler.parseFeed(feed);
+                    successful = true;
+                } catch (SAXException e) {
+                    e.printStackTrace();
+                    reasonDetailed = e.getMessage();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                    reasonDetailed = e.getMessage();
+                } catch (ParserConfigurationException e) {
+                    e.printStackTrace();
+                    reasonDetailed = e.getMessage();
+                } catch (UnsupportedFeedtypeException e) {
+                    e.printStackTrace();
+                    reasonDetailed = e.getMessage();
+                } finally {
+                    boolean rc = new File(feed.getFile_url()).delete();
+                    if (AppConfig.DEBUG)
+                        Log.d(TAG, "Deleted feed source file. Result: " + rc);
+                }
+
+                if (successful) {
+                    runOnUiThread(new Runnable() {
+                        @Override
+                        public void run() {
+                            showFeedInformation(feed);
+                        }
+                    });
+                } else {
+                    final String errorMsg =
+                            DownloadError.ERROR_PARSER_EXCEPTION.getErrorString(
+                                    OnlineFeedViewActivity.this)
+                                    + " (" + reasonDetailed + ")";
+                    runOnUiThread(new Runnable() {
+
+                        @Override
+                        public void run() {
+                            showErrorDialog(errorMsg);
+                        }
+                    });
+                }
+            }
+        };
+        thread.start();
+    }
+
+    /**
+     * Can be used to load data asynchronously.
+     * */
+    protected void loadData() {
+
+    }
+
+    /**
+     * Called when feed parsed successfully
+     */
+    protected void showFeedInformation(Feed feed) {
+
+    }
+
+    private void showErrorDialog(String errorMsg) {
+        AlertDialog.Builder builder = new AlertDialog.Builder(this);
+        builder.setTitle(R.string.error_label);
+        if (errorMsg != null) {
+            builder.setMessage(getString(R.string.error_msg_prefix) + errorMsg);
+        } else {
+            builder.setMessage(R.string.error_msg_prefix);
+        }
+        builder.setNeutralButton(android.R.string.ok,
+                new DialogInterface.OnClickListener() {
+
+                    @Override
+                    public void onClick(DialogInterface dialog, int which) {
+                        dialog.cancel();
+                    }
+                });
+        builder.setOnCancelListener(new OnCancelListener() {
+            @Override
+            public void onCancel(DialogInterface dialog) {
+                setResult(RESULT_ERROR);
+                finish();
+            }
+        });
+    }
 
 }
diff --git a/src/de/danoeh/antennapod/activity/PreferenceActivity.java b/src/de/danoeh/antennapod/activity/PreferenceActivity.java
index 96471d06d..bae6c2e17 100644
--- a/src/de/danoeh/antennapod/activity/PreferenceActivity.java
+++ b/src/de/danoeh/antennapod/activity/PreferenceActivity.java
@@ -1,10 +1,5 @@
 package de.danoeh.antennapod.activity;
 
-import java.io.File;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-
 import android.content.Context;
 import android.content.Intent;
 import android.content.res.Resources.Theme;
@@ -18,17 +13,24 @@ import android.preference.Preference.OnPreferenceChangeListener;
 import android.preference.Preference.OnPreferenceClickListener;
 import android.preference.PreferenceScreen;
 import android.util.Log;
-
 import android.view.Menu;
 import android.view.MenuItem;
+import android.widget.Toast;
 import de.danoeh.antennapod.AppConfig;
 import de.danoeh.antennapod.R;
 import de.danoeh.antennapod.asynctask.FlattrClickWorker;
 import de.danoeh.antennapod.asynctask.OpmlExportWorker;
+import de.danoeh.antennapod.dialog.AuthenticationDialog;
 import de.danoeh.antennapod.dialog.VariableSpeedDialog;
+import de.danoeh.antennapod.preferences.GpodnetPreferences;
 import de.danoeh.antennapod.preferences.UserPreferences;
 import de.danoeh.antennapod.util.flattr.FlattrUtils;
 
+import java.io.File;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
 /**
  * The main preference activity
  */
@@ -43,7 +45,11 @@ public class PreferenceActivity extends android.preference.PreferenceActivity {
     private static final String PREF_CHOOSE_DATA_DIR = "prefChooseDataDir";
     private static final String AUTO_DL_PREF_SCREEN = "prefAutoDownloadSettings";
     private static final String PREF_PLAYBACK_SPEED_LAUNCHER = "prefPlaybackSpeedLauncher";
-    
+
+    private static final String PREF_GPODNET_LOGIN = "pref_gpodnet_authenticate";
+    private static final String PREF_GPODNET_SETLOGIN_INFORMATION = "pref_gpodnet_setlogin_information";
+    private static final String PREF_GPODNET_LOGOUT = "pref_gpodnet_logout";
+
     private CheckBoxPreference[] selectedNetworks;
 
     @SuppressWarnings("deprecation")
@@ -56,9 +62,9 @@ public class PreferenceActivity extends android.preference.PreferenceActivity {
             getActionBar().setDisplayHomeAsUpEnabled(true);
         }
 
-		addPreferencesFromResource(R.xml.preferences);
-		findPreference(PREF_FLATTR_THIS_APP).setOnPreferenceClickListener(
-				new OnPreferenceClickListener() {
+        addPreferencesFromResource(R.xml.preferences);
+        findPreference(PREF_FLATTR_THIS_APP).setOnPreferenceClickListener(
+                new OnPreferenceClickListener() {
 
                     @Override
                     public boolean onPreferenceClick(Preference preference) {
@@ -166,11 +172,45 @@ public class PreferenceActivity extends android.preference.PreferenceActivity {
                         return true;
                     }
                 });
+        findPreference(PREF_GPODNET_SETLOGIN_INFORMATION).setOnPreferenceClickListener(new OnPreferenceClickListener() {
+            @Override
+            public boolean onPreferenceClick(Preference preference) {
+                AuthenticationDialog dialog = new AuthenticationDialog(PreferenceActivity.this,
+                        R.string.pref_gpodnet_setlogin_information_title, false, false, GpodnetPreferences.getUsername(),
+                        null) {
+
+                    @Override
+                    protected void onConfirmed(String username, String password, boolean saveUsernamePassword) {
+                        GpodnetPreferences.setPassword(password);
+                    }
+                };
+                dialog.show();
+                return true;
+            }
+        });
+        findPreference(PREF_GPODNET_LOGOUT).setOnPreferenceClickListener(new OnPreferenceClickListener() {
+            @Override
+            public boolean onPreferenceClick(Preference preference) {
+                GpodnetPreferences.logout();
+                Toast toast = Toast.makeText(PreferenceActivity.this, R.string.pref_gpodnet_logout_toast, Toast.LENGTH_SHORT);
+                toast.show();
+                updateGpodnetPreferenceScreen();
+                return true;
+            }
+        });
         buildUpdateIntervalPreference();
         buildAutodownloadSelectedNetworsPreference();
         setSelectedNetworksEnabled(UserPreferences
                 .isEnableAutodownloadWifiFilter());
 
+
+    }
+
+    private void updateGpodnetPreferenceScreen() {
+        final boolean loggedIn = GpodnetPreferences.loggedIn();
+        findPreference(PREF_GPODNET_LOGIN).setEnabled(!loggedIn);
+        findPreference(PREF_GPODNET_SETLOGIN_INFORMATION).setEnabled(loggedIn);
+        findPreference(PREF_GPODNET_LOGOUT).setEnabled(loggedIn);
     }
 
     private void buildUpdateIntervalPreference() {
@@ -214,6 +254,7 @@ public class PreferenceActivity extends android.preference.PreferenceActivity {
         checkItemVisibility();
         setEpisodeCacheSizeText(UserPreferences.getEpisodeCacheSize());
         setDataFolderText();
+        updateGpodnetPreferenceScreen();
     }
 
     @SuppressWarnings("deprecation")
diff --git a/src/de/danoeh/antennapod/activity/gpoddernet/GpodnetActivity.java b/src/de/danoeh/antennapod/activity/gpoddernet/GpodnetActivity.java
new file mode 100644
index 000000000..08b37ae60
--- /dev/null
+++ b/src/de/danoeh/antennapod/activity/gpoddernet/GpodnetActivity.java
@@ -0,0 +1,44 @@
+package de.danoeh.antennapod.activity.gpoddernet;
+
+import android.app.SearchManager;
+import android.content.Context;
+import android.os.Bundle;
+import android.support.v4.view.MenuItemCompat;
+import android.support.v7.app.ActionBarActivity;
+import android.support.v7.widget.SearchView;
+import android.view.Menu;
+import android.view.MenuItem;
+import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.preferences.UserPreferences;
+
+/**
+ * Created by daniel on 23.08.13.
+ */
+public class GpodnetActivity extends ActionBarActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        setTheme(UserPreferences.getTheme());
+        super.onCreate(savedInstanceState);
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        MenuItemCompat.setShowAsAction(menu.add(Menu.NONE, R.id.search_item, Menu.NONE, R.string.search_label)
+                .setIcon(
+                        obtainStyledAttributes(
+                                new int[]{R.attr.action_search})
+                                .getDrawable(0)),
+                MenuItem.SHOW_AS_ACTION_IF_ROOM);
+        MenuItemCompat.setActionView(menu.findItem(R.id.search_item), new SearchView(this));
+
+        SearchManager searchManager =
+                (SearchManager) getSystemService(Context.SEARCH_SERVICE);
+        SearchView searchView = (SearchView) MenuItemCompat.getActionView(menu.findItem(R.id.search_item));
+        searchView.setIconifiedByDefault(true);
+        searchView.setSearchableInfo(
+                searchManager.getSearchableInfo(getComponentName()));
+
+        return true;
+    }
+}
diff --git a/src/de/danoeh/antennapod/activity/gpoddernet/GpodnetAuthenticationActivity.java b/src/de/danoeh/antennapod/activity/gpoddernet/GpodnetAuthenticationActivity.java
new file mode 100644
index 000000000..d355a7826
--- /dev/null
+++ b/src/de/danoeh/antennapod/activity/gpoddernet/GpodnetAuthenticationActivity.java
@@ -0,0 +1,370 @@
+package de.danoeh.antennapod.activity.gpoddernet;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.res.Configuration;
+import android.os.AsyncTask;
+import android.os.Bundle;
+import android.support.v4.app.NavUtils;
+import android.support.v7.app.ActionBarActivity;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.*;
+import de.danoeh.antennapod.AppConfig;
+import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.activity.MainActivity;
+import de.danoeh.antennapod.gpoddernet.GpodnetService;
+import de.danoeh.antennapod.gpoddernet.GpodnetServiceException;
+import de.danoeh.antennapod.gpoddernet.model.GpodnetDevice;
+import de.danoeh.antennapod.preferences.GpodnetPreferences;
+import de.danoeh.antennapod.preferences.UserPreferences;
+import de.danoeh.antennapod.service.GpodnetSyncService;
+
+import java.security.SecureRandom;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicReference;
+
+/**
+ * Guides the user through the authentication process
+ * Step 1: Request username and password from user
+ * Step 2: Choose device from a list of available devices or create a new one
+ * Step 3: Choose from a list of actions
+ */
+public class GpodnetAuthenticationActivity extends ActionBarActivity {
+    private static final String TAG = "GpodnetAuthenticationActivity";
+
+    private static final String CURRENT_STEP = "current_step";
+
+    private ViewFlipper viewFlipper;
+
+    private static final int STEP_DEFAULT = -1;
+    private static final int STEP_LOGIN = 0;
+    private static final int STEP_DEVICE = 1;
+    private static final int STEP_FINISH = 2;
+
+    private int currentStep = -1;
+
+    private GpodnetService service;
+    private volatile String username;
+    private volatile String password;
+    private volatile GpodnetDevice selectedDevice;
+
+    View[] views;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
+        setTheme(UserPreferences.getTheme());
+
+        setContentView(R.layout.gpodnetauth_activity);
+        service = new GpodnetService();
+
+        viewFlipper = (ViewFlipper) findViewById(R.id.viewflipper);
+        LayoutInflater inflater = (LayoutInflater)
+                getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+        views = new View[]{
+                inflater.inflate(R.layout.gpodnetauth_credentials, null),
+                inflater.inflate(R.layout.gpodnetauth_device, null),
+                inflater.inflate(R.layout.gpodnetauth_finish, null)
+        };
+        for (View view : views) {
+            viewFlipper.addView(view);
+        }
+        advance();
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        if (service != null) {
+            service.shutdown();
+        }
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case android.R.id.home:
+                NavUtils.navigateUpFromSameTask(this);
+                return true;
+        }
+        return super.onOptionsItemSelected(item);
+    }
+
+    @Override
+    public void onConfigurationChanged(Configuration newConfig) {
+    }
+
+    private void setupLoginView(View view) {
+        final EditText username = (EditText) view.findViewById(R.id.etxtUsername);
+        final EditText password = (EditText) view.findViewById(R.id.etxtPassword);
+        final Button login = (Button) view.findViewById(R.id.butLogin);
+        final TextView txtvError = (TextView) view.findViewById(R.id.txtvError);
+        final ProgressBar progressBar = (ProgressBar) view.findViewById(R.id.progBarLogin);
+
+        login.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+
+                final String usernameStr = username.getText().toString();
+                final String passwordStr = password.getText().toString();
+
+                if (AppConfig.DEBUG) Log.d(TAG, "Checking login credentials");
+                new AsyncTask<GpodnetService, Void, Void>() {
+
+                    volatile Exception exception;
+
+                    @Override
+                    protected void onPreExecute() {
+                        super.onPreExecute();
+                        login.setEnabled(false);
+                        progressBar.setVisibility(View.VISIBLE);
+                        txtvError.setVisibility(View.GONE);
+
+                    }
+
+                    @Override
+                    protected void onPostExecute(Void aVoid) {
+                        super.onPostExecute(aVoid);
+                        login.setEnabled(true);
+                        progressBar.setVisibility(View.GONE);
+
+                        if (exception == null) {
+                            advance();
+                        } else {
+                            txtvError.setText(exception.getMessage());
+                            txtvError.setVisibility(View.VISIBLE);
+                        }
+                    }
+
+                    @Override
+                    protected Void doInBackground(GpodnetService... params) {
+                        try {
+                            params[0].authenticate(usernameStr, passwordStr);
+                            GpodnetAuthenticationActivity.this.username = usernameStr;
+                            GpodnetAuthenticationActivity.this.password = passwordStr;
+                        } catch (GpodnetServiceException e) {
+                            e.printStackTrace();
+                            exception = e;
+                        }
+                        return null;
+                    }
+                }.execute(service);
+            }
+        });
+    }
+
+    private void setupDeviceView(View view) {
+        final EditText deviceID = (EditText) view.findViewById(R.id.etxtDeviceID);
+        final EditText caption = (EditText) view.findViewById(R.id.etxtCaption);
+        final Button createNewDevice = (Button) view.findViewById(R.id.butCreateNewDevice);
+        final Button chooseDevice = (Button) view.findViewById(R.id.butChooseExistingDevice);
+        final TextView txtvError = (TextView) view.findViewById(R.id.txtvError);
+        final ProgressBar progBarCreateDevice = (ProgressBar) view.findViewById(R.id.progbarCreateDevice);
+        final Spinner spinnerDevices = (Spinner) view.findViewById(R.id.spinnerChooseDevice);
+
+
+        // load device list
+        final AtomicReference<List<GpodnetDevice>> devices = new AtomicReference<List<GpodnetDevice>>();
+        new AsyncTask<GpodnetService, Void, List<GpodnetDevice>>() {
+
+            private volatile Exception exception;
+
+            @Override
+            protected void onPreExecute() {
+                super.onPreExecute();
+                chooseDevice.setEnabled(false);
+                spinnerDevices.setEnabled(false);
+                createNewDevice.setEnabled(false);
+            }
+
+            @Override
+            protected void onPostExecute(List<GpodnetDevice> gpodnetDevices) {
+                super.onPostExecute(gpodnetDevices);
+                if (gpodnetDevices != null) {
+                    List<String> deviceNames = new ArrayList<String>();
+                    for (GpodnetDevice device : gpodnetDevices) {
+                        deviceNames.add(device.getCaption());
+                    }
+                    spinnerDevices.setAdapter(new ArrayAdapter<String>(GpodnetAuthenticationActivity.this,
+                            android.R.layout.simple_spinner_dropdown_item, deviceNames));
+                    spinnerDevices.setEnabled(true);
+                    if (!deviceNames.isEmpty()) {
+                        chooseDevice.setEnabled(true);
+                    }
+                    devices.set(gpodnetDevices);
+                    createNewDevice.setEnabled(true);
+                }
+            }
+
+            @Override
+            protected List<GpodnetDevice> doInBackground(GpodnetService... params) {
+                try {
+                    return params[0].getDevices(username);
+                } catch (GpodnetServiceException e) {
+                    e.printStackTrace();
+                    exception = e;
+                    return null;
+                }
+            }
+        }.execute(service);
+
+
+        createNewDevice.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if (checkDeviceIDText(deviceID, txtvError, devices.get())) {
+                    final String deviceStr = deviceID.getText().toString();
+                    final String captionStr = caption.getText().toString();
+
+                    new AsyncTask<GpodnetService, Void, GpodnetDevice>() {
+
+                        private volatile Exception exception;
+
+                        @Override
+                        protected void onPreExecute() {
+                            super.onPreExecute();
+                            createNewDevice.setEnabled(false);
+                            chooseDevice.setEnabled(false);
+                            progBarCreateDevice.setVisibility(View.VISIBLE);
+                            txtvError.setVisibility(View.GONE);
+                        }
+
+                        @Override
+                        protected void onPostExecute(GpodnetDevice result) {
+                            super.onPostExecute(result);
+                            createNewDevice.setEnabled(true);
+                            chooseDevice.setEnabled(true);
+                            progBarCreateDevice.setVisibility(View.GONE);
+                            if (exception == null) {
+                                selectedDevice = result;
+                                advance();
+                            } else {
+                                txtvError.setText(exception.getMessage());
+                                txtvError.setVisibility(View.VISIBLE);
+                            }
+                        }
+
+                        @Override
+                        protected GpodnetDevice doInBackground(GpodnetService... params) {
+                            try {
+                                params[0].configureDevice(username, deviceStr, captionStr, GpodnetDevice.DeviceType.MOBILE);
+                                return new GpodnetDevice(deviceStr, captionStr, GpodnetDevice.DeviceType.MOBILE.toString(), 0);
+                            } catch (GpodnetServiceException e) {
+                                e.printStackTrace();
+                                exception = e;
+                            }
+                            return null;
+                        }
+                    }.execute(service);
+                }
+            }
+        });
+
+        deviceID.setText(generateDeviceID());
+        chooseDevice.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                final int position = spinnerDevices.getSelectedItemPosition();
+                selectedDevice = devices.get().get(position);
+                advance();
+            }
+        });
+    }
+
+
+    private String generateDeviceID() {
+        final int DEVICE_ID_LENGTH = 10;
+        StringBuilder buffer = new StringBuilder(DEVICE_ID_LENGTH);
+        SecureRandom random = new SecureRandom();
+        for (int i = 0; i < DEVICE_ID_LENGTH; i++) {
+            buffer.append(random.nextInt(10));
+
+        }
+        return buffer.toString();
+    }
+
+    private boolean checkDeviceIDText(EditText deviceID, TextView txtvError, List<GpodnetDevice> devices) {
+        String text = deviceID.getText().toString();
+        if (text.length() == 0) {
+            txtvError.setText(R.string.gpodnetauth_device_errorEmpty);
+            txtvError.setVisibility(View.VISIBLE);
+            return false;
+        } else {
+            if (devices != null) {
+                for (GpodnetDevice device : devices) {
+                    if (device.getId().equals(text)) {
+                        txtvError.setText(R.string.gpodnetauth_device_errorAlreadyUsed);
+                        txtvError.setVisibility(View.VISIBLE);
+                        return false;
+                    }
+                }
+                txtvError.setVisibility(View.GONE);
+                return true;
+            }
+            return true;
+        }
+
+    }
+
+    private void setupFinishView(View view) {
+        final Button sync = (Button) view.findViewById(R.id.butSyncNow);
+        final Button back = (Button) view.findViewById(R.id.butGoMainscreen);
+
+        sync.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                GpodnetSyncService.sendSyncIntent(GpodnetAuthenticationActivity.this);
+                finish();
+            }
+        });
+        back.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Intent intent = new Intent(GpodnetAuthenticationActivity.this, MainActivity.class);
+                intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
+                startActivity(intent);
+            }
+        });
+    }
+
+    private void writeLoginCredentials() {
+        if (AppConfig.DEBUG) Log.d(TAG, "Writing login credentials");
+        GpodnetPreferences.setUsername(username);
+        GpodnetPreferences.setPassword(password);
+        GpodnetPreferences.setDeviceID(selectedDevice.getId());
+    }
+
+    private void advance() {
+        if (currentStep < STEP_FINISH) {
+
+            View view = views[currentStep + 1];
+            if (currentStep == STEP_DEFAULT) {
+                setupLoginView(view);
+            } else if (currentStep == STEP_LOGIN) {
+                if (username == null || password == null) {
+                    throw new IllegalStateException("Username and password must not be null here");
+                } else {
+                    setupDeviceView(view);
+                }
+            } else if (currentStep == STEP_DEVICE) {
+                if (selectedDevice == null) {
+                    throw new IllegalStateException("Device must not be null here");
+                } else {
+                    writeLoginCredentials();
+                    setupFinishView(view);
+                }
+            }
+            if (currentStep != STEP_DEFAULT) {
+                viewFlipper.showNext();
+            }
+            currentStep++;
+        } else {
+            finish();
+        }
+    }
+}
diff --git a/src/de/danoeh/antennapod/activity/gpoddernet/GpodnetMainActivity.java b/src/de/danoeh/antennapod/activity/gpoddernet/GpodnetMainActivity.java
new file mode 100644
index 000000000..9535e9d32
--- /dev/null
+++ b/src/de/danoeh/antennapod/activity/gpoddernet/GpodnetMainActivity.java
@@ -0,0 +1,89 @@
+package de.danoeh.antennapod.activity.gpoddernet;
+
+import android.os.Bundle;
+import android.support.v4.app.Fragment;
+import android.support.v4.app.FragmentManager;
+import android.support.v4.app.FragmentStatePagerAdapter;
+import android.support.v4.app.NavUtils;
+import android.support.v4.view.ViewPager;
+import android.view.MenuItem;
+import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.fragment.gpodnet.PodcastTopListFragment;
+import de.danoeh.antennapod.fragment.gpodnet.SuggestionListFragment;
+import de.danoeh.antennapod.fragment.gpodnet.TagListFragment;
+import de.danoeh.antennapod.preferences.GpodnetPreferences;
+
+/**
+ * Created by daniel on 22.08.13.
+ */
+public class GpodnetMainActivity extends GpodnetActivity {
+    private static final String TAG = "GPodnetMainActivity";
+
+    private static final int POS_TAGS = 0;
+    private static final int POS_TOPLIST = 1;
+    private static final int POS_SUGGESTIONS = 2;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
+        setContentView(R.layout.gpodnet_main);
+        ViewPager viewpager = (ViewPager) findViewById(R.id.viewpager);
+        viewpager.setAdapter(new PagerAdapter(getSupportFragmentManager()));
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case android.R.id.home:
+                NavUtils.navigateUpFromSameTask(this);
+                return true;
+        }
+        return super.onOptionsItemSelected(item);
+    }
+
+    private class PagerAdapter extends FragmentStatePagerAdapter {
+
+        private static final int NUM_PAGES_LOGGED_OUT = 2;
+        private static final int NUM_PAGES_LOGGED_IN = 3;
+        private final int NUM_PAGES;
+
+        public PagerAdapter(FragmentManager fm) {
+            super(fm);
+            NUM_PAGES = NUM_PAGES_LOGGED_OUT;
+        }
+
+        @Override
+        public Fragment getItem(int i) {
+            switch (i) {
+                case POS_TAGS:
+                    return new TagListFragment();
+                case POS_TOPLIST:
+                    return new PodcastTopListFragment();
+                case POS_SUGGESTIONS:
+                    return new SuggestionListFragment();
+                default:
+                    return null;
+            }
+        }
+
+        @Override
+        public CharSequence getPageTitle(int position) {
+            switch (position) {
+                case POS_TAGS:
+                    return getString(R.string.gpodnet_taglist_header);
+                case POS_TOPLIST:
+                    return getString(R.string.gpodnet_toplist_header);
+                case POS_SUGGESTIONS:
+                    return getString(R.string.gpodnet_suggestions_header);
+                default:
+                    return super.getPageTitle(position);
+            }
+        }
+
+        @Override
+        public int getCount() {
+            return NUM_PAGES;
+        }
+    }
+}
diff --git a/src/de/danoeh/antennapod/activity/gpoddernet/GpodnetSearchActivity.java b/src/de/danoeh/antennapod/activity/gpoddernet/GpodnetSearchActivity.java
new file mode 100644
index 000000000..199b45dc9
--- /dev/null
+++ b/src/de/danoeh/antennapod/activity/gpoddernet/GpodnetSearchActivity.java
@@ -0,0 +1,63 @@
+package de.danoeh.antennapod.activity.gpoddernet;
+
+import android.app.SearchManager;
+import android.content.Intent;
+import android.os.Bundle;
+import android.support.v4.app.FragmentTransaction;
+import android.support.v4.app.NavUtils;
+import android.view.MenuItem;
+import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.fragment.gpodnet.SearchListFragment;
+import org.apache.commons.lang3.StringUtils;
+
+/**
+ * Created by daniel on 23.08.13.
+ */
+public class GpodnetSearchActivity extends GpodnetActivity {
+
+    private SearchListFragment searchFragment;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
+        setContentView(R.layout.gpodnet_search);
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        Intent intent = getIntent();
+        if (StringUtils.equals(intent.getAction(), Intent.ACTION_SEARCH)) {
+            handleSearchRequest(intent.getStringExtra(SearchManager.QUERY));
+        }
+    }
+
+    @Override
+    protected void onNewIntent(Intent intent) {
+        setIntent(intent);
+    }
+
+    private void handleSearchRequest(String query) {
+        getSupportActionBar().setSubtitle(getString(R.string.search_term_label) + query);
+        if (searchFragment == null) {
+            FragmentTransaction transaction = getSupportFragmentManager()
+                    .beginTransaction();
+            searchFragment = SearchListFragment.newInstance(query);
+            transaction.replace(R.id.searchListFragment, searchFragment);
+            transaction.commit();
+        } else {
+            searchFragment.changeQuery(query);
+        }
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case android.R.id.home:
+                NavUtils.navigateUpFromSameTask(this);
+                return true;
+        }
+        return super.onOptionsItemSelected(item);
+    }
+}
diff --git a/src/de/danoeh/antennapod/activity/gpoddernet/GpodnetTagActivity.java b/src/de/danoeh/antennapod/activity/gpoddernet/GpodnetTagActivity.java
new file mode 100644
index 000000000..f3922f7aa
--- /dev/null
+++ b/src/de/danoeh/antennapod/activity/gpoddernet/GpodnetTagActivity.java
@@ -0,0 +1,64 @@
+package de.danoeh.antennapod.activity.gpoddernet;
+
+import android.os.Bundle;
+import android.support.v4.app.Fragment;
+import android.support.v4.app.FragmentTransaction;
+import android.support.v4.app.NavUtils;
+import android.view.MenuItem;
+import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.fragment.gpodnet.PodcastListFragment;
+import de.danoeh.antennapod.fragment.gpodnet.SearchListFragment;
+import de.danoeh.antennapod.gpoddernet.GpodnetService;
+import de.danoeh.antennapod.gpoddernet.GpodnetServiceException;
+import de.danoeh.antennapod.gpoddernet.model.GpodnetPodcast;
+import de.danoeh.antennapod.gpoddernet.model.GpodnetTag;
+
+import java.util.List;
+
+/**
+ * Created by daniel on 23.08.13.
+ */
+public class GpodnetTagActivity extends GpodnetActivity{
+
+    private static final int PODCAST_COUNT = 50;
+    public static final String ARG_TAGNAME = "tagname";
+
+    private GpodnetTag tag;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
+        setContentView(R.layout.gpodnet_tag_activity);
+
+        if (!getIntent().hasExtra(ARG_TAGNAME)) {
+            throw new IllegalArgumentException("No tagname argument");
+        }
+        tag = new GpodnetTag(getIntent().getStringExtra(ARG_TAGNAME));
+        getSupportActionBar().setTitle(tag.getName());
+
+        FragmentTransaction transaction = getSupportFragmentManager()
+                .beginTransaction();
+        Fragment taglistFragment = new TaglistFragment();
+        transaction.replace(R.id.taglistFragment, taglistFragment);
+        transaction.commit();
+    }
+
+    private class TaglistFragment extends PodcastListFragment {
+
+        @Override
+        protected List<GpodnetPodcast> loadPodcastData(GpodnetService service) throws GpodnetServiceException {
+            return service.getPodcastsForTag(tag, PODCAST_COUNT);
+        }
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case android.R.id.home:
+                NavUtils.navigateUpFromSameTask(this);
+                return true;
+        }
+        return super.onOptionsItemSelected(item);
+    }
+}
diff --git a/src/de/danoeh/antennapod/adapter/FeedItemlistDescriptionAdapter.java b/src/de/danoeh/antennapod/adapter/FeedItemlistDescriptionAdapter.java
new file mode 100644
index 000000000..5fb204b26
--- /dev/null
+++ b/src/de/danoeh/antennapod/adapter/FeedItemlistDescriptionAdapter.java
@@ -0,0 +1,55 @@
+package de.danoeh.antennapod.adapter;
+
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.TextView;
+import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.feed.FeedItem;
+
+import java.util.List;
+
+/**
+ * Created by daniel on 24.08.13.
+ */
+public class FeedItemlistDescriptionAdapter extends ArrayAdapter<FeedItem> {
+
+    public FeedItemlistDescriptionAdapter(Context context, int resource, List<FeedItem> objects) {
+        super(context, resource, objects);
+    }
+
+    @Override
+    public View getView(int position, View convertView, ViewGroup parent) {
+        Holder holder;
+
+        FeedItem item = getItem(position);
+
+        // Inflate layout
+        if (convertView == null) {
+            holder = new Holder();
+            LayoutInflater inflater = (LayoutInflater) getContext()
+                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+            convertView = inflater.inflate(R.layout.itemdescription_listitem, null);
+            holder.title = (TextView) convertView.findViewById(R.id.txtvTitle);
+            holder.description = (TextView) convertView.findViewById(R.id.txtvDescription);
+
+            convertView.setTag(holder);
+        } else {
+            holder = (Holder) convertView.getTag();
+        }
+
+        holder.title.setText(item.getTitle());
+        if (item.getDescription() != null) {
+            holder.description.setText(item.getDescription());
+        }
+
+        return convertView;
+    }
+
+    static class Holder {
+        TextView title;
+        TextView description;
+    }
+}
diff --git a/src/de/danoeh/antennapod/adapter/gpodnet/PodcastListAdapter.java b/src/de/danoeh/antennapod/adapter/gpodnet/PodcastListAdapter.java
new file mode 100644
index 000000000..795b17917
--- /dev/null
+++ b/src/de/danoeh/antennapod/adapter/gpodnet/PodcastListAdapter.java
@@ -0,0 +1,63 @@
+package de.danoeh.antennapod.adapter.gpodnet;
+
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.ImageView;
+import android.widget.TextView;
+import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.asynctask.ImageDiskCache;
+import de.danoeh.antennapod.gpoddernet.model.GpodnetPodcast;
+
+import java.util.List;
+
+/**
+ * Adapter for displaying a list of GPodnetPodcast-Objects.
+ */
+public class PodcastListAdapter extends ArrayAdapter<GpodnetPodcast> {
+    private final ImageDiskCache diskCache;
+    private final int thumbnailLength;
+
+    public PodcastListAdapter(Context context, int resource, List<GpodnetPodcast> objects) {
+        super(context, resource, objects);
+        diskCache = ImageDiskCache.getDefaultInstance();
+        thumbnailLength = (int) context.getResources().getDimension(R.dimen.thumbnail_length);
+    }
+
+    @Override
+    public View getView(int position, View convertView, ViewGroup parent) {
+        Holder holder;
+
+        GpodnetPodcast podcast = getItem(position);
+
+        // Inflate Layout
+        if (convertView == null) {
+            holder = new Holder();
+            LayoutInflater inflater = (LayoutInflater) getContext()
+                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+
+            convertView = inflater.inflate(R.layout.gpodnet_podcast_listitem, null);
+            holder.title = (TextView) convertView.findViewById(R.id.txtvTitle);
+            holder.description = (TextView) convertView.findViewById(R.id.txtvDescription);
+            holder.image = (ImageView) convertView.findViewById(R.id.imgvCover);
+
+            convertView.setTag(holder);
+        } else {
+            holder = (Holder) convertView.getTag();
+        }
+
+        holder.title.setText(podcast.getTitle());
+        holder.description.setText(podcast.getDescription());
+        diskCache.loadThumbnailBitmap(podcast.getLogoUrl(), holder.image, thumbnailLength);
+
+        return convertView;
+    }
+
+    static class Holder {
+        TextView title;
+        TextView description;
+        ImageView image;
+    }
+}
diff --git a/src/de/danoeh/antennapod/asynctask/BitmapDecodeWorkerTask.java b/src/de/danoeh/antennapod/asynctask/BitmapDecodeWorkerTask.java
index 7ba68ae22..cb8e4d292 100644
--- a/src/de/danoeh/antennapod/asynctask/BitmapDecodeWorkerTask.java
+++ b/src/de/danoeh/antennapod/asynctask/BitmapDecodeWorkerTask.java
@@ -2,105 +2,115 @@ package de.danoeh.antennapod.asynctask;
 
 import android.content.res.TypedArray;
 import android.graphics.BitmapFactory;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
+import android.graphics.drawable.TransitionDrawable;
 import android.os.Handler;
 import android.util.Log;
 import android.widget.ImageView;
 import de.danoeh.antennapod.AppConfig;
+import de.danoeh.antennapod.PodcastApp;
 import de.danoeh.antennapod.R;
 import de.danoeh.antennapod.asynctask.ImageLoader.ImageWorkerTaskResource;
 import de.danoeh.antennapod.util.BitmapDecoder;
 
 public class BitmapDecodeWorkerTask extends Thread {
 
-	protected int PREFERRED_LENGTH;
+    protected int PREFERRED_LENGTH;
+    public static final int FADE_DURATION = 500;
 
-	/** Can be thumbnail or cover */
-	protected int imageType;
+    /**
+     * Can be thumbnail or cover
+     */
+    protected int imageType;
 
-	private static final String TAG = "BitmapDecodeWorkerTask";
-	private ImageView target;
-	protected CachedBitmap cBitmap;
+    private static final String TAG = "BitmapDecodeWorkerTask";
+    private ImageView target;
+    protected CachedBitmap cBitmap;
 
-	protected ImageLoader.ImageWorkerTaskResource imageResource;
+    protected ImageLoader.ImageWorkerTaskResource imageResource;
 
-	private Handler handler;
+    private Handler handler;
 
-	private final int defaultCoverResource;
+    private final int defaultCoverResource;
 
-	public BitmapDecodeWorkerTask(Handler handler, ImageView target,
-			ImageWorkerTaskResource imageResource, int length, int imageType) {
-		super();
-		this.handler = handler;
-		this.target = target;
-		this.imageResource = imageResource;
-		this.PREFERRED_LENGTH = length;
-		this.imageType = imageType;
-		TypedArray res = target.getContext().obtainStyledAttributes(
-				new int[] { R.attr.default_cover });
-		this.defaultCoverResource = res.getResourceId(0, 0);
-		res.recycle();
-	}
+    public BitmapDecodeWorkerTask(Handler handler, ImageView target,
+                                  ImageWorkerTaskResource imageResource, int length, int imageType) {
+        super();
+        this.handler = handler;
+        this.target = target;
+        this.imageResource = imageResource;
+        this.PREFERRED_LENGTH = length;
+        this.imageType = imageType;
+        this.defaultCoverResource = android.R.color.transparent;
+    }
 
-	/**
-	 * Should return true if tag of the imageview is still the same it was
-	 * before the bitmap was decoded
-	 */
-	protected boolean tagsMatching(ImageView target) {
-		return target.getTag() == null
-				|| target.getTag().equals(imageResource.getImageLoaderCacheKey());
-	}
+    /**
+     * Should return true if tag of the imageview is still the same it was
+     * before the bitmap was decoded
+     */
+    protected boolean tagsMatching(ImageView target) {
+        return target.getTag(R.id.imageloader_key) == null
+                || target.getTag(R.id.imageloader_key).equals(imageResource.getImageLoaderCacheKey());
+    }
 
-	protected void onPostExecute() {
-		// check if imageview is still supposed to display this image
-		if (tagsMatching(target) && cBitmap.getBitmap() != null) {
-			target.setImageBitmap(cBitmap.getBitmap());
-		} else {
-			if (AppConfig.DEBUG)
-				Log.d(TAG, "Not displaying image");
-		}
-	}
+    protected void onPostExecute() {
+        // check if imageview is still supposed to display this image
+        if (tagsMatching(target) && cBitmap.getBitmap() != null) {
+            Drawable[] drawables = new Drawable[]{
+                    PodcastApp.getInstance().getResources().getDrawable(android.R.color.transparent),
+                    new BitmapDrawable(PodcastApp.getInstance().getResources(), cBitmap.getBitmap())
+            };
+            TransitionDrawable transitionDrawable = new TransitionDrawable(drawables);
+            target.setImageDrawable(transitionDrawable);
+            transitionDrawable.startTransition(FADE_DURATION);
+        } else {
+            if (AppConfig.DEBUG)
+                Log.d(TAG, "Not displaying image");
+        }
+    }
 
-	@Override
-	public void run() {
-		cBitmap = new CachedBitmap(BitmapDecoder.decodeBitmapFromWorkerTaskResource(
-				PREFERRED_LENGTH, imageResource), PREFERRED_LENGTH);
-		if (cBitmap.getBitmap() != null) {
-			storeBitmapInCache(cBitmap);
-		} else {
-			Log.w(TAG, "Could not load bitmap. Using default image.");
-			cBitmap = new CachedBitmap(BitmapFactory.decodeResource(
-					target.getResources(), defaultCoverResource),
-					PREFERRED_LENGTH);
-		}
-		if (AppConfig.DEBUG)
-			Log.d(TAG, "Finished loading bitmaps");
+    @Override
+    public void run() {
+        cBitmap = new CachedBitmap(BitmapDecoder.decodeBitmapFromWorkerTaskResource(
+                PREFERRED_LENGTH, imageResource), PREFERRED_LENGTH);
+        if (cBitmap.getBitmap() != null) {
+            storeBitmapInCache(cBitmap);
+        } else {
+            Log.w(TAG, "Could not load bitmap. Using default image.");
+            cBitmap = new CachedBitmap(BitmapFactory.decodeResource(
+                    target.getResources(), defaultCoverResource),
+                    PREFERRED_LENGTH);
+        }
+        if (AppConfig.DEBUG)
+            Log.d(TAG, "Finished loading bitmaps");
 
-		endBackgroundTask();
-	}
+        endBackgroundTask();
+    }
 
-	protected final void endBackgroundTask() {
-		handler.post(new Runnable() {
+    protected final void endBackgroundTask() {
+        handler.post(new Runnable() {
 
-			@Override
-			public void run() {
-				onPostExecute();
-			}
+            @Override
+            public void run() {
+                onPostExecute();
+            }
 
-		});
-	}
+        });
+    }
 
-	protected void onInvalidStream() {
-		cBitmap = new CachedBitmap(BitmapFactory.decodeResource(
-				target.getResources(), defaultCoverResource), PREFERRED_LENGTH);
-	}
+    protected void onInvalidStream() {
+        cBitmap = new CachedBitmap(BitmapFactory.decodeResource(
+                target.getResources(), defaultCoverResource), PREFERRED_LENGTH);
+    }
 
-	protected void storeBitmapInCache(CachedBitmap cb) {
-		ImageLoader loader = ImageLoader.getInstance();
-		if (imageType == ImageLoader.IMAGE_TYPE_COVER) {
-			loader.addBitmapToCoverCache(imageResource.getImageLoaderCacheKey(), cb);
-		} else if (imageType == ImageLoader.IMAGE_TYPE_THUMBNAIL) {
-			loader.addBitmapToThumbnailCache(imageResource.getImageLoaderCacheKey(), cb);
-		}
-	}
+    protected void storeBitmapInCache(CachedBitmap cb) {
+        ImageLoader loader = ImageLoader.getInstance();
+        if (imageType == ImageLoader.IMAGE_TYPE_COVER) {
+            loader.addBitmapToCoverCache(imageResource.getImageLoaderCacheKey(), cb);
+        } else if (imageType == ImageLoader.IMAGE_TYPE_THUMBNAIL) {
+            loader.addBitmapToThumbnailCache(imageResource.getImageLoaderCacheKey(), cb);
+        }
+    }
 
 }
diff --git a/src/de/danoeh/antennapod/asynctask/ImageDiskCache.java b/src/de/danoeh/antennapod/asynctask/ImageDiskCache.java
new file mode 100644
index 000000000..f7f6b576f
--- /dev/null
+++ b/src/de/danoeh/antennapod/asynctask/ImageDiskCache.java
@@ -0,0 +1,391 @@
+package de.danoeh.antennapod.asynctask;
+
+import android.os.Handler;
+import android.util.Log;
+import android.util.Pair;
+import android.widget.ImageView;
+import de.danoeh.antennapod.AppConfig;
+import de.danoeh.antennapod.PodcastApp;
+import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.service.download.DownloadRequest;
+import de.danoeh.antennapod.service.download.HttpDownloader;
+import org.apache.commons.io.IOUtils;
+import org.apache.commons.lang3.StringUtils;
+
+import java.io.*;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.List;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+/**
+ * Provides local cache for storing downloaded image. An image disk cache downloads images and stores them as long
+ * as the cache is not full. Once the cache is full, the image disk cache will delete older images.
+ */
+public class ImageDiskCache {
+    private static final String TAG = "ImageDiskCache";
+
+    private static HashMap<String, ImageDiskCache> cacheSingletons = new HashMap<String, ImageDiskCache>();
+
+    /**
+     * Return a default instance of an ImageDiskCache. This cache will store data in the external cache folder.
+     */
+    public static synchronized ImageDiskCache getDefaultInstance() {
+        final String DEFAULT_PATH = "imagecache";
+        final long DEFAULT_MAX_CACHE_SIZE = 10 * 1024 * 1024;
+
+        File cacheDir = PodcastApp.getInstance().getExternalCacheDir();
+        if (cacheDir == null) {
+            return null;
+        }
+        return getInstance(new File(cacheDir, DEFAULT_PATH).getAbsolutePath(), DEFAULT_MAX_CACHE_SIZE);
+    }
+
+    /**
+     * Return an instance of an ImageDiskCache that stores images in the specified folder.
+     */
+    public static synchronized ImageDiskCache getInstance(String path, long maxCacheSize) {
+        if (path == null) {
+            throw new NullPointerException();
+        }
+        if (cacheSingletons.containsKey(path)) {
+            return cacheSingletons.get(path);
+        }
+
+        ImageDiskCache cache = cacheSingletons.get(path);
+        if (cache == null) {
+            cache = new ImageDiskCache(path, maxCacheSize);
+            cacheSingletons.put(new File(path).getAbsolutePath(), cache);
+        }
+        cacheSingletons.put(path, cache);
+        return cache;
+    }
+
+    /**
+     * Filename - cache object mapping
+     */
+    private static final String CACHE_FILE_NAME = "cachefile";
+    private ExecutorService executor;
+    private ConcurrentHashMap<String, DiskCacheObject> diskCache;
+    private final long maxCacheSize;
+    private int cacheSize;
+    private final File cacheFolder;
+    private Handler handler;
+
+    private ImageDiskCache(String path, long maxCacheSize) {
+        this.maxCacheSize = maxCacheSize;
+        this.cacheFolder = new File(path);
+        if (!cacheFolder.exists() && !cacheFolder.mkdir()) {
+            throw new IllegalArgumentException("Image disk cache could not create cache folder in: " + path);
+        }
+
+        executor = Executors.newFixedThreadPool(Runtime.getRuntime()
+                .availableProcessors());
+        handler = new Handler();
+    }
+
+    private synchronized void initCacheFolder() {
+        if (diskCache == null) {
+            if (AppConfig.DEBUG) Log.d(TAG, "Initializing cache folder");
+            File cacheFile = new File(cacheFolder, CACHE_FILE_NAME);
+            if (cacheFile.exists()) {
+                try {
+                    InputStream in = new FileInputStream(cacheFile);
+                    BufferedInputStream buffer = new BufferedInputStream(in);
+                    ObjectInputStream objectInput = new ObjectInputStream(buffer);
+                    diskCache = (ConcurrentHashMap<String, DiskCacheObject>) objectInput.readObject();
+                    // calculate cache size
+                    for (DiskCacheObject dco : diskCache.values()) {
+                        cacheSize += dco.size;
+                    }
+                    deleteInvalidFiles();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                    diskCache = new ConcurrentHashMap<String, DiskCacheObject>();
+                } catch (ClassCastException e) {
+                    e.printStackTrace();
+                    diskCache = new ConcurrentHashMap<String, DiskCacheObject>();
+                } catch (ClassNotFoundException e) {
+                    e.printStackTrace();
+                    diskCache = new ConcurrentHashMap<String, DiskCacheObject>();
+                }
+            } else {
+                diskCache = new ConcurrentHashMap<String, DiskCacheObject>();
+            }
+        }
+    }
+
+    private List<File> getCacheFileList() {
+        Collection<DiskCacheObject> values = diskCache.values();
+        List<File> files = new ArrayList<File>();
+        for (DiskCacheObject dco : values) {
+            files.add(dco.getFile());
+        }
+        files.add(new File(cacheFolder, CACHE_FILE_NAME));
+        return files;
+    }
+
+    private Pair<String, DiskCacheObject> getOldestCacheObject() {
+        Collection<String> keys = diskCache.keySet();
+        DiskCacheObject oldest = null;
+        String oldestKey = null;
+
+        for (String key : keys) {
+
+            if (oldestKey == null) {
+                oldestKey = key;
+                oldest = diskCache.get(key);
+            } else {
+                DiskCacheObject dco = diskCache.get(key);
+                if (oldest.timestamp > dco.timestamp) {
+                    oldestKey = key;
+                    oldest = diskCache.get(key);
+                }
+            }
+        }
+        return new Pair<String, DiskCacheObject>(oldestKey, oldest);
+    }
+
+    private synchronized void deleteCacheObject(String key, DiskCacheObject value) {
+        Log.i(TAG, "Deleting cached object: " + key);
+        diskCache.remove(key);
+        boolean result = value.getFile().delete();
+        if (!result) {
+            Log.w(TAG, "Could not delete file " + value.fileUrl);
+        }
+        cacheSize -= value.size;
+    }
+
+    private synchronized void deleteInvalidFiles() {
+        // delete files that are not stored inside the cache
+        File[] files = cacheFolder.listFiles();
+        List<File> cacheFiles = getCacheFileList();
+        for (File file : files) {
+            if (!cacheFiles.contains(file)) {
+                Log.i(TAG, "Deleting unused file: " + file.getAbsolutePath());
+                boolean result = file.delete();
+                if (!result) {
+                    Log.w(TAG, "Could not delete file: " + file.getAbsolutePath());
+                }
+            }
+        }
+    }
+
+    private synchronized void cleanup() {
+        if (cacheSize > maxCacheSize) {
+            while (cacheSize > maxCacheSize) {
+                Pair<String, DiskCacheObject> oldest = getOldestCacheObject();
+                deleteCacheObject(oldest.first, oldest.second);
+            }
+        }
+    }
+
+    /**
+     * Loads a new image from the disk cache. If the image that the url points to has already been downloaded, the image will
+     * be loaded from the disk. Otherwise, the image will be downloaded first.
+     * The image will be stored in the thumbnail cache.
+     */
+    public void loadThumbnailBitmap(final String url, final ImageView target, final int length) {
+        final ImageLoader il = ImageLoader.getInstance();
+        target.setTag(R.id.image_disk_cache_key, url);
+        if (diskCache != null) {
+            DiskCacheObject dco = getFromCacheIfAvailable(url);
+            if (dco != null) {
+                il.loadThumbnailBitmap(dco.loadImage(), target, length);
+                return;
+            }
+        }
+        target.setImageResource(android.R.color.transparent);
+        executor.submit(new ImageDownloader(url) {
+            @Override
+            protected void onImageLoaded(DiskCacheObject diskCacheObject) {
+                final Object tag = target.getTag(R.id.image_disk_cache_key);
+                if (tag != null || StringUtils.equals((String) tag, url)) {
+                    il.loadThumbnailBitmap(diskCacheObject.loadImage(), target, length);
+                }
+            }
+        });
+
+    }
+
+    /**
+     * Loads a new image from the disk cache. If the image that the url points to has already been downloaded, the image will
+     * be loaded from the disk. Otherwise, the image will be downloaded first.
+     * The image will be stored in the cover cache.
+     */
+    public void loadCoverBitmap(final String url, final ImageView target, final int length) {
+        final ImageLoader il = ImageLoader.getInstance();
+        target.setTag(R.id.image_disk_cache_key, url);
+        if (diskCache != null) {
+            DiskCacheObject dco = getFromCacheIfAvailable(url);
+            if (dco != null) {
+                il.loadThumbnailBitmap(dco.loadImage(), target, length);
+                return;
+            }
+        }
+        target.setImageResource(android.R.color.transparent);
+        executor.submit(new ImageDownloader(url) {
+            @Override
+            protected void onImageLoaded(DiskCacheObject diskCacheObject) {
+                final Object tag = target.getTag(R.id.image_disk_cache_key);
+                if (tag != null || StringUtils.equals((String) tag, url)) {
+                    il.loadCoverBitmap(diskCacheObject.loadImage(), target, length);
+                }
+            }
+        });
+    }
+
+    private synchronized void addToDiskCache(String url, DiskCacheObject obj) {
+        if (diskCache == null) {
+            initCacheFolder();
+        }
+        if (AppConfig.DEBUG) Log.d(TAG, "Adding new image to disk cache: " + url);
+        diskCache.put(url, obj);
+        cacheSize += obj.size;
+        if (cacheSize > maxCacheSize) {
+            cleanup();
+        }
+        saveCacheInfoFile();
+    }
+
+    private synchronized void saveCacheInfoFile() {
+        OutputStream out = null;
+        try {
+            out = new BufferedOutputStream(new FileOutputStream(new File(cacheFolder, CACHE_FILE_NAME)));
+            ObjectOutputStream objOut = new ObjectOutputStream(out);
+            objOut.writeObject(diskCache);
+        } catch (IOException e) {
+            e.printStackTrace();
+        } finally {
+            IOUtils.closeQuietly(out);
+        }
+    }
+
+    private synchronized DiskCacheObject getFromCacheIfAvailable(String key) {
+        if (diskCache == null) {
+            initCacheFolder();
+        }
+        DiskCacheObject dco = diskCache.get(key);
+        if (dco != null) {
+            dco.timestamp = System.currentTimeMillis();
+        }
+        return dco;
+    }
+
+    ConcurrentHashMap<String, File> runningDownloads = new ConcurrentHashMap<String, File>();
+
+    private abstract class ImageDownloader implements Runnable {
+        private String downloadUrl;
+
+        public ImageDownloader(String downloadUrl) {
+            this.downloadUrl = downloadUrl;
+        }
+
+        protected abstract void onImageLoaded(DiskCacheObject diskCacheObject);
+
+        public void run() {
+            DiskCacheObject tmp = getFromCacheIfAvailable(downloadUrl);
+            if (tmp != null) {
+                onImageLoaded(tmp);
+                return;
+            }
+
+            DiskCacheObject dco = null;
+            File newFile = new File(cacheFolder, Integer.toString(downloadUrl.hashCode()));
+            synchronized (ImageDiskCache.this) {
+                if (runningDownloads.containsKey(newFile.getAbsolutePath())) {
+                    Log.d(TAG, "Download is already running: " + newFile.getAbsolutePath());
+                    return;
+                } else {
+                    runningDownloads.put(newFile.getAbsolutePath(), newFile);
+                }
+            }
+            if (newFile.exists()) {
+                newFile.delete();
+            }
+
+            HttpDownloader result = downloadFile(newFile.getAbsolutePath(), downloadUrl);
+            if (result.getResult().isSuccessful()) {
+                long size = result.getDownloadRequest().getSoFar();
+
+                dco = new DiskCacheObject(newFile.getAbsolutePath(), size);
+                addToDiskCache(downloadUrl, dco);
+                if (AppConfig.DEBUG) Log.d(TAG, "Image was downloaded");
+            } else {
+                Log.w(TAG, "Download of url " + downloadUrl + " failed. Reason: " + result.getResult().getReasonDetailed() + "(" + result.getResult().getReason() + ")");
+            }
+
+            if (dco != null) {
+                final DiskCacheObject dcoRef = dco;
+                handler.post(new Runnable() {
+                    @Override
+                    public void run() {
+                        onImageLoaded(dcoRef);
+                    }
+                });
+
+            }
+            runningDownloads.remove(newFile.getAbsolutePath());
+
+        }
+
+        private HttpDownloader downloadFile(String destination, String source) {
+            DownloadRequest request = new DownloadRequest(destination, source, "", 0, 0);
+            HttpDownloader downloader = new HttpDownloader(request);
+            downloader.call();
+            return downloader;
+        }
+    }
+
+    private static class DiskCacheObject implements Serializable {
+        private final String fileUrl;
+
+        /**
+         * Last usage of this image cache object.
+         */
+        private long timestamp;
+        private final long size;
+
+        public DiskCacheObject(String fileUrl, long size) {
+            if (fileUrl == null) {
+                throw new NullPointerException();
+            }
+            this.fileUrl = fileUrl;
+            this.timestamp = System.currentTimeMillis();
+            this.size = size;
+        }
+
+        public File getFile() {
+            return new File(fileUrl);
+        }
+
+        public ImageLoader.ImageWorkerTaskResource loadImage() {
+            return new ImageLoader.ImageWorkerTaskResource() {
+
+                @Override
+                public InputStream openImageInputStream() {
+                    try {
+                        return new FileInputStream(getFile());
+                    } catch (FileNotFoundException e) {
+                        e.printStackTrace();
+                    }
+                    return null;
+                }
+
+                @Override
+                public InputStream reopenImageInputStream(InputStream input) {
+                    IOUtils.closeQuietly(input);
+                    return openImageInputStream();
+                }
+
+                @Override
+                public String getImageLoaderCacheKey() {
+                    return fileUrl;
+                }
+            };
+        }
+    }
+}
diff --git a/src/de/danoeh/antennapod/asynctask/ImageLoader.java b/src/de/danoeh/antennapod/asynctask/ImageLoader.java
index 45a99e704..a4a9bc823 100644
--- a/src/de/danoeh/antennapod/asynctask/ImageLoader.java
+++ b/src/de/danoeh/antennapod/asynctask/ImageLoader.java
@@ -66,7 +66,7 @@ public class ImageLoader {
 
 	private ExecutorService createExecutor() {
 		return Executors.newFixedThreadPool(Runtime.getRuntime()
-				.availableProcessors() + 1, new ThreadFactory() {
+				.availableProcessors(), new ThreadFactory() {
 
 			@Override
 			public Thread newThread(Runnable r) {
@@ -106,7 +106,8 @@ public class ImageLoader {
 				.getContext());
 
 		if (source != null && source.getImageLoaderCacheKey() != null) {
-			CachedBitmap cBitmap = getBitmapFromCoverCache(source.getImageLoaderCacheKey());
+            target.setTag(R.id.imageloader_key, source.getImageLoaderCacheKey());
+            CachedBitmap cBitmap = getBitmapFromCoverCache(source.getImageLoaderCacheKey());
 			if (cBitmap != null && cBitmap.getLength() >= length) {
 				target.setImageBitmap(cBitmap.getBitmap());
 			} else {
@@ -143,7 +144,8 @@ public class ImageLoader {
 				.getContext());
 
 		if (source != null && source.getImageLoaderCacheKey() != null) {
-			CachedBitmap cBitmap = getBitmapFromThumbnailCache(source.getImageLoaderCacheKey());
+            target.setTag(R.id.imageloader_key, source.getImageLoaderCacheKey());
+            CachedBitmap cBitmap = getBitmapFromThumbnailCache(source.getImageLoaderCacheKey());
 			if (cBitmap != null && cBitmap.getLength() >= length) {
 				target.setImageBitmap(cBitmap.getBitmap());
 			} else {
@@ -195,11 +197,7 @@ public class ImageLoader {
 	}
 
 	private int getDefaultCoverResource(Context context) {
-		TypedArray res = context
-				.obtainStyledAttributes(new int[] { R.attr.default_cover });
-		final int defaultCoverResource = res.getResourceId(0, 0);
-		res.recycle();
-		return defaultCoverResource;
+		return android.R.color.transparent;
 	}
 
 	/**
diff --git a/src/de/danoeh/antennapod/dialog/AuthenticationDialog.java b/src/de/danoeh/antennapod/dialog/AuthenticationDialog.java
new file mode 100644
index 000000000..bdb2d68ba
--- /dev/null
+++ b/src/de/danoeh/antennapod/dialog/AuthenticationDialog.java
@@ -0,0 +1,89 @@
+package de.danoeh.antennapod.dialog;
+
+import android.app.Dialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.os.Bundle;
+import android.view.View;
+import android.view.Window;
+import android.widget.Button;
+import android.widget.CheckBox;
+import android.widget.EditText;
+import de.danoeh.antennapod.R;
+
+/**
+ * Displays a dialog with a username and password text field and an optional checkbox to save username and preferences.
+ */
+public abstract class AuthenticationDialog extends Dialog {
+
+    private final int titleRes;
+    private final boolean enableUsernameField;
+    private final boolean showSaveCredentialsCheckbox;
+    private final String usernameInitialValue;
+    private final String passwordInitialValue;
+
+    public AuthenticationDialog(Context context, int titleRes, boolean enableUsernameField, boolean showSaveCredentialsCheckbox, String usernameInitialValue, String passwordInitialValue) {
+        super(context);
+        this.titleRes = titleRes;
+        this.enableUsernameField = enableUsernameField;
+        this.showSaveCredentialsCheckbox = showSaveCredentialsCheckbox;
+        this.usernameInitialValue = usernameInitialValue;
+        this.passwordInitialValue = passwordInitialValue;
+    }
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.authentication_dialog);
+        final EditText etxtUsername = (EditText) findViewById(R.id.etxtUsername);
+        final EditText etxtPassword = (EditText) findViewById(R.id.etxtPassword);
+        final CheckBox saveUsernamePassword = (CheckBox) findViewById(R.id.chkSaveUsernamePassword);
+        final Button butConfirm = (Button) findViewById(R.id.butConfirm);
+        final Button butCancel = (Button) findViewById(R.id.butCancel);
+
+        if (titleRes != 0) {
+            setTitle(titleRes);
+        } else {
+            requestWindowFeature(Window.FEATURE_NO_TITLE);
+        }
+        etxtUsername.setEnabled(enableUsernameField);
+        if (showSaveCredentialsCheckbox) {
+            saveUsernamePassword.setVisibility(View.VISIBLE);
+        } else {
+            saveUsernamePassword.setVisibility(View.GONE);
+        }
+        if (usernameInitialValue != null) {
+            etxtUsername.setText(usernameInitialValue);
+        }
+        if (passwordInitialValue != null) {
+            etxtPassword.setText(passwordInitialValue);
+        }
+        setOnCancelListener(new OnCancelListener() {
+            @Override
+            public void onCancel(DialogInterface dialog) {
+                onCancelled();
+            }
+        });
+        butCancel.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                cancel();
+            }
+        });
+        butConfirm.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                onConfirmed(etxtUsername.getText().toString(),
+                        etxtPassword.getText().toString(),
+                        showSaveCredentialsCheckbox && saveUsernamePassword.isChecked());
+                dismiss();
+            }
+        });
+    }
+
+    protected void onCancelled() {
+
+    }
+
+    protected abstract void onConfirmed(String username, String password, boolean saveUsernamePassword);
+}
diff --git a/src/de/danoeh/antennapod/fragment/gpodnet/PodcastListFragment.java b/src/de/danoeh/antennapod/fragment/gpodnet/PodcastListFragment.java
new file mode 100644
index 000000000..32e11e0ce
--- /dev/null
+++ b/src/de/danoeh/antennapod/fragment/gpodnet/PodcastListFragment.java
@@ -0,0 +1,120 @@
+package de.danoeh.antennapod.fragment.gpodnet;
+
+import android.content.Context;
+import android.content.Intent;
+import android.os.AsyncTask;
+import android.os.Bundle;
+import android.support.v4.app.Fragment;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.GridView;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+import de.danoeh.antennapod.AppConfig;
+import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.activity.DefaultOnlineFeedViewActivity;
+import de.danoeh.antennapod.activity.OnlineFeedViewActivity;
+import de.danoeh.antennapod.adapter.gpodnet.PodcastListAdapter;
+import de.danoeh.antennapod.gpoddernet.GpodnetService;
+import de.danoeh.antennapod.gpoddernet.GpodnetServiceException;
+import de.danoeh.antennapod.gpoddernet.model.GpodnetPodcast;
+
+import java.util.List;
+
+/**
+ * Displays a list of GPodnetPodcast-Objects in a GridView
+ */
+public abstract class PodcastListFragment extends Fragment {
+    private static final String TAG = "PodcastListFragment";
+
+    private GridView gridView;
+    private ProgressBar progressBar;
+    private TextView txtvError;
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+        setRetainInstance(true);
+        View root = inflater.inflate(R.layout.gpodnet_podcast_list, container, false);
+
+        gridView = (GridView) root.findViewById(R.id.gridView);
+        progressBar = (ProgressBar) root.findViewById(R.id.progressBar);
+        txtvError = (TextView) root.findViewById(R.id.txtvError);
+
+        gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
+            @Override
+            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
+                onPodcastSelected((GpodnetPodcast) gridView.getAdapter().getItem(position));
+            }
+        });
+
+        loadData();
+        return root;
+    }
+
+    protected void onPodcastSelected(GpodnetPodcast selection) {
+        if (AppConfig.DEBUG) Log.d(TAG, "Selected podcast: " + selection.toString());
+        Intent intent = new Intent(getActivity(), DefaultOnlineFeedViewActivity.class);
+        intent.putExtra(OnlineFeedViewActivity.ARG_FEEDURL, selection.getUrl());
+        intent.putExtra(DefaultOnlineFeedViewActivity.ARG_TITLE, getString(R.string.gpodnet_main_label));
+        startActivity(intent);
+    }
+
+    protected abstract List<GpodnetPodcast> loadPodcastData(GpodnetService service) throws GpodnetServiceException;
+
+    protected final void loadData() {
+        AsyncTask<Void, Void, List<GpodnetPodcast>> loaderTask = new AsyncTask<Void, Void, List<GpodnetPodcast>>() {
+            volatile Exception exception = null;
+
+            @Override
+            protected List<GpodnetPodcast> doInBackground(Void... params) {
+                GpodnetService service = null;
+                try {
+                    service = new GpodnetService();
+                    return loadPodcastData(service);
+                } catch (GpodnetServiceException e) {
+                    exception = e;
+                    e.printStackTrace();
+                    return null;
+                } finally {
+                    if (service != null) {
+                        service.shutdown();
+                    }
+                }
+            }
+
+            @Override
+            protected void onPostExecute(List<GpodnetPodcast> gpodnetPodcasts) {
+                super.onPostExecute(gpodnetPodcasts);
+                final Context context = getActivity();
+                if (context != null && gpodnetPodcasts != null) {
+                    PodcastListAdapter listAdapter = new PodcastListAdapter(context, 0, gpodnetPodcasts);
+                    gridView.setAdapter(listAdapter);
+                    listAdapter.notifyDataSetChanged();
+
+                    progressBar.setVisibility(View.GONE);
+                    gridView.setVisibility(View.VISIBLE);
+                } else if (context != null) {
+                    gridView.setVisibility(View.GONE);
+                    progressBar.setVisibility(View.GONE);
+                    txtvError.setText(getString(R.string.error_msg_prefix) + exception.getMessage());
+                }
+            }
+
+            @Override
+            protected void onPreExecute() {
+                super.onPreExecute();
+                gridView.setVisibility(View.GONE);
+                progressBar.setVisibility(View.VISIBLE);
+            }
+        };
+
+        if (android.os.Build.VERSION.SDK_INT > android.os.Build.VERSION_CODES.GINGERBREAD_MR1) {
+            loaderTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
+        } else {
+            loaderTask.execute();
+        }
+    }
+}
diff --git a/src/de/danoeh/antennapod/fragment/gpodnet/PodcastTopListFragment.java b/src/de/danoeh/antennapod/fragment/gpodnet/PodcastTopListFragment.java
new file mode 100644
index 000000000..7007d0b9a
--- /dev/null
+++ b/src/de/danoeh/antennapod/fragment/gpodnet/PodcastTopListFragment.java
@@ -0,0 +1,22 @@
+package de.danoeh.antennapod.fragment.gpodnet;
+
+import android.util.Log;
+import de.danoeh.antennapod.AppConfig;
+import de.danoeh.antennapod.gpoddernet.GpodnetService;
+import de.danoeh.antennapod.gpoddernet.GpodnetServiceException;
+import de.danoeh.antennapod.gpoddernet.model.GpodnetPodcast;
+
+import java.util.List;
+
+/**
+ *
+ */
+public class PodcastTopListFragment extends PodcastListFragment {
+    private static final String TAG = "PodcastTopListFragment";
+    private static final int PODCAST_COUNT = 50;
+
+    @Override
+    protected List<GpodnetPodcast> loadPodcastData(GpodnetService service) throws GpodnetServiceException {
+        return service.getPodcastToplist(PODCAST_COUNT);
+    }
+}
diff --git a/src/de/danoeh/antennapod/fragment/gpodnet/SearchListFragment.java b/src/de/danoeh/antennapod/fragment/gpodnet/SearchListFragment.java
new file mode 100644
index 000000000..322d13097
--- /dev/null
+++ b/src/de/danoeh/antennapod/fragment/gpodnet/SearchListFragment.java
@@ -0,0 +1,48 @@
+package de.danoeh.antennapod.fragment.gpodnet;
+
+import android.os.Bundle;
+import de.danoeh.antennapod.gpoddernet.GpodnetService;
+import de.danoeh.antennapod.gpoddernet.GpodnetServiceException;
+import de.danoeh.antennapod.gpoddernet.model.GpodnetPodcast;
+
+import java.util.List;
+
+/**
+ * Created by daniel on 23.08.13.
+ */
+public class SearchListFragment extends PodcastListFragment {
+    private static final String ARG_QUERY = "query";
+
+    private String query;
+
+    public static SearchListFragment newInstance(String query) {
+        SearchListFragment fragment = new SearchListFragment();
+        Bundle args = new Bundle();
+        args.putString(ARG_QUERY, query);
+        fragment.setArguments(args);
+        return fragment;
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        if (getArguments() != null && getArguments().containsKey(ARG_QUERY)) {
+            this.query = getArguments().getString(ARG_QUERY);
+        } else {
+            this.query = "";
+        }
+    }
+
+    @Override
+    protected List<GpodnetPodcast> loadPodcastData(GpodnetService service) throws GpodnetServiceException {
+        return service.searchPodcasts(query, 0);
+    }
+
+    public void changeQuery(String query) {
+        if (query == null) {
+            throw new NullPointerException();
+        }
+        this.query = query;
+        loadData();
+    }
+}
diff --git a/src/de/danoeh/antennapod/fragment/gpodnet/SuggestionListFragment.java b/src/de/danoeh/antennapod/fragment/gpodnet/SuggestionListFragment.java
new file mode 100644
index 000000000..45fe25580
--- /dev/null
+++ b/src/de/danoeh/antennapod/fragment/gpodnet/SuggestionListFragment.java
@@ -0,0 +1,26 @@
+package de.danoeh.antennapod.fragment.gpodnet;
+
+import de.danoeh.antennapod.gpoddernet.GpodnetService;
+import de.danoeh.antennapod.gpoddernet.GpodnetServiceException;
+import de.danoeh.antennapod.gpoddernet.model.GpodnetPodcast;
+import de.danoeh.antennapod.preferences.GpodnetPreferences;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Displays suggestions from gpodder.net
+ */
+public class SuggestionListFragment extends PodcastListFragment {
+    private static final int SUGGESTIONS_COUNT = 50;
+
+    @Override
+    protected List<GpodnetPodcast> loadPodcastData(GpodnetService service) throws GpodnetServiceException {
+        if (GpodnetPreferences.loggedIn()) {
+            service.authenticate(GpodnetPreferences.getUsername(), GpodnetPreferences.getPassword());
+            return service.getSuggestions(SUGGESTIONS_COUNT);
+        } else {
+            return new ArrayList<GpodnetPodcast>();
+        }
+    }
+}
diff --git a/src/de/danoeh/antennapod/fragment/gpodnet/TagListFragment.java b/src/de/danoeh/antennapod/fragment/gpodnet/TagListFragment.java
new file mode 100644
index 000000000..3d63f2e58
--- /dev/null
+++ b/src/de/danoeh/antennapod/fragment/gpodnet/TagListFragment.java
@@ -0,0 +1,96 @@
+package de.danoeh.antennapod.fragment.gpodnet;
+
+import android.R;
+import android.content.Context;
+import android.content.Intent;
+import android.os.AsyncTask;
+import android.os.Bundle;
+import android.support.v4.app.ListFragment;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.ArrayAdapter;
+import android.widget.TextView;
+import de.danoeh.antennapod.activity.gpoddernet.GpodnetTagActivity;
+import de.danoeh.antennapod.gpoddernet.GpodnetService;
+import de.danoeh.antennapod.gpoddernet.GpodnetServiceException;
+import de.danoeh.antennapod.gpoddernet.model.GpodnetTag;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class TagListFragment extends ListFragment {
+    private static final String TAG = "TagListFragment";
+    private static final int COUNT = 50;
+
+    @Override
+    public void onViewCreated(View view, Bundle savedInstanceState) {
+        super.onViewCreated(view, savedInstanceState);
+        setRetainInstance(true);
+
+        getListView().setOnItemClickListener(new AdapterView.OnItemClickListener() {
+            @Override
+            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
+                String selectedTag = (String) getListAdapter().getItem(position);
+                Intent intent = new Intent(getActivity(), GpodnetTagActivity.class);
+                intent.putExtra(GpodnetTagActivity.ARG_TAGNAME, selectedTag);
+                startActivity(intent);
+            }
+        });
+
+        loadData();
+    }
+
+    private void loadData() {
+        AsyncTask<Void, Void, List<GpodnetTag>> task = new AsyncTask<Void, Void, List<GpodnetTag>>() {
+            private Exception exception;
+
+            @Override
+            protected List<GpodnetTag> doInBackground(Void... params) {
+                GpodnetService service = new GpodnetService();
+                try {
+                    return service.getTopTags(COUNT);
+                } catch (GpodnetServiceException e) {
+                    e.printStackTrace();
+                    exception = e;
+                    return null;
+                } finally {
+                    service.shutdown();
+                }
+            }
+
+            @Override
+            protected void onPreExecute() {
+                super.onPreExecute();
+                setListShown(false);
+            }
+
+            @Override
+            protected void onPostExecute(List<GpodnetTag> gpodnetTags) {
+                super.onPostExecute(gpodnetTags);
+                final Context context = getActivity();
+                if (context != null) {
+                    if (gpodnetTags != null) {
+                        List<String> tagNames = new ArrayList<String>();
+                        for (GpodnetTag tag : gpodnetTags) {
+                            tagNames.add(tag.getName());
+                        }
+                        setListAdapter(new ArrayAdapter<String>(context, R.layout.simple_list_item_1, tagNames));
+                        setListShown(true);
+                    } else if (exception != null) {
+                        TextView txtvError = new TextView(getActivity());
+                        txtvError.setText(exception.getMessage());
+                        getListView().setEmptyView(txtvError);
+                    } else {
+                        setListShown(true);
+                    }
+                }
+            }
+        };
+        if (android.os.Build.VERSION.SDK_INT > android.os.Build.VERSION_CODES.GINGERBREAD_MR1) {
+            task.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
+        } else {
+            task.execute();
+        }
+    }
+}
+
diff --git a/src/de/danoeh/antennapod/gpoddernet/GpodnetClient.java b/src/de/danoeh/antennapod/gpoddernet/GpodnetClient.java
new file mode 100644
index 000000000..845a23823
--- /dev/null
+++ b/src/de/danoeh/antennapod/gpoddernet/GpodnetClient.java
@@ -0,0 +1,35 @@
+package de.danoeh.antennapod.gpoddernet;
+
+import org.apache.http.conn.ClientConnectionManager;
+import org.apache.http.conn.scheme.PlainSocketFactory;
+import org.apache.http.conn.scheme.Scheme;
+import org.apache.http.conn.scheme.SchemeRegistry;
+import org.apache.http.conn.ssl.SSLSocketFactory;
+import org.apache.http.impl.client.DefaultHttpClient;
+import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;
+import org.apache.http.params.BasicHttpParams;
+
+/**
+ * HTTP client for the gpodder.net service.
+ */
+public class GpodnetClient extends DefaultHttpClient {
+
+    private static SchemeRegistry prepareSchemeRegistry() {
+        SchemeRegistry sr = new SchemeRegistry();
+
+        Scheme http = new Scheme("http",
+                PlainSocketFactory.getSocketFactory(), 80);
+        sr.register(http);
+        Scheme https = new Scheme("https",
+                SSLSocketFactory.getSocketFactory(), 443);
+        sr.register(https);
+
+        return sr;
+    }
+
+    @Override
+    protected ClientConnectionManager createClientConnectionManager() {
+        return new ThreadSafeClientConnManager(new BasicHttpParams(), prepareSchemeRegistry());
+    }
+
+}
diff --git a/src/de/danoeh/antennapod/gpoddernet/GpodnetService.java b/src/de/danoeh/antennapod/gpoddernet/GpodnetService.java
new file mode 100644
index 000000000..7e0a34e0b
--- /dev/null
+++ b/src/de/danoeh/antennapod/gpoddernet/GpodnetService.java
@@ -0,0 +1,725 @@
+package de.danoeh.antennapod.gpoddernet;
+
+import de.danoeh.antennapod.AppConfig;
+import de.danoeh.antennapod.gpoddernet.model.*;
+import org.apache.http.Header;
+import org.apache.http.HttpEntity;
+import org.apache.http.HttpResponse;
+import org.apache.http.HttpStatus;
+import org.apache.http.auth.AuthenticationException;
+import org.apache.http.auth.UsernamePasswordCredentials;
+import org.apache.http.client.ClientProtocolException;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.client.methods.HttpPost;
+import org.apache.http.client.methods.HttpPut;
+import org.apache.http.client.methods.HttpRequestBase;
+import org.apache.http.entity.StringEntity;
+import org.apache.http.impl.auth.BasicScheme;
+import org.apache.http.params.CoreProtocolPNames;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.UnsupportedEncodingException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.LinkedList;
+import java.util.List;
+
+/**
+ * Communicates with the gpodder.net service.
+ */
+public class GpodnetService {
+
+    private static final String BASE_SCHEME = "https";
+    private static final String BASE_HOST = "gpodder.net";
+
+    private GpodnetClient httpClient;
+
+    public GpodnetService() {
+        httpClient = new GpodnetClient();
+        httpClient.getParams().setParameter(CoreProtocolPNames.USER_AGENT, AppConfig.USER_AGENT);
+    }
+
+    /**
+     * Returns the [count] most used tags.
+     */
+    public List<GpodnetTag> getTopTags(int count)
+            throws GpodnetServiceException {
+        URI uri;
+        try {
+            uri = new URI(BASE_SCHEME, BASE_HOST, String.format(
+                    "/api/2/tags/%d.json", count), null);
+        } catch (URISyntaxException e1) {
+            e1.printStackTrace();
+            throw new IllegalStateException(e1);
+        }
+
+        HttpGet request = new HttpGet(uri);
+        String response = executeRequest(request);
+        try {
+            JSONArray jsonTagList = new JSONArray(response);
+            List<GpodnetTag> tagList = new ArrayList<GpodnetTag>(
+                    jsonTagList.length());
+            for (int i = 0; i < jsonTagList.length(); i++) {
+                JSONObject jObj = jsonTagList.getJSONObject(i);
+                String name = jObj.getString("tag");
+                int usage = jObj.getInt("usage");
+                tagList.add(new GpodnetTag(name, usage));
+            }
+            return tagList;
+        } catch (JSONException e) {
+            e.printStackTrace();
+            throw new GpodnetServiceException(e);
+        }
+    }
+
+    /**
+     * Returns the [count] most subscribed podcasts for the given tag.
+     *
+     * @throws IllegalArgumentException if tag is null
+     */
+    public List<GpodnetPodcast> getPodcastsForTag(GpodnetTag tag, int count)
+            throws GpodnetServiceException {
+        if (tag == null) {
+            throw new IllegalArgumentException(
+                    "Tag and title of tag must not be null");
+        }
+        try {
+            URI uri = new URI(BASE_SCHEME, BASE_HOST, String.format(
+                    "/api/2/tag/%s/%d.json", tag.getName(), count), null);
+            HttpGet request = new HttpGet(uri);
+            String response = executeRequest(request);
+
+            JSONArray jsonArray = new JSONArray(response);
+            return readPodcastListFromJSONArray(jsonArray);
+
+        } catch (JSONException e) {
+            e.printStackTrace();
+            throw new GpodnetServiceException(e);
+        } catch (URISyntaxException e) {
+            e.printStackTrace();
+            throw new GpodnetServiceException(e);
+
+        }
+    }
+
+    /**
+     * Returns the toplist of podcast.
+     *
+     * @param count of elements that should be returned. Must be in range 1..100.
+     * @throws IllegalArgumentException if count is out of range.
+     */
+    public List<GpodnetPodcast> getPodcastToplist(int count)
+            throws GpodnetServiceException {
+        if (count < 1 || count > 100) {
+            throw new IllegalArgumentException("Count must be in range 1..100");
+        }
+        try {
+            URI uri = new URI(BASE_SCHEME, BASE_HOST, String.format(
+                    "/toplist/%d.json", count), null);
+            HttpGet request = new HttpGet(uri);
+            String response = executeRequest(request);
+
+            JSONArray jsonArray = new JSONArray(response);
+            return readPodcastListFromJSONArray(jsonArray);
+
+        } catch (JSONException e) {
+            e.printStackTrace();
+            throw new GpodnetServiceException(e);
+        } catch (URISyntaxException e) {
+            e.printStackTrace();
+            throw new IllegalStateException(e);
+
+        }
+    }
+
+    /**
+     * Returns a list of suggested podcasts for the user that is currently
+     * logged in.
+     * <p/>
+     * This method requires authentication.
+     *
+     * @param count The
+     *              number of elements that should be returned. Must be in range
+     *              1..100.
+     * @throws IllegalArgumentException              if count is out of range.
+     * @throws GpodnetServiceAuthenticationException If there is an authentication error.
+     */
+    public List<GpodnetPodcast> getSuggestions(int count) throws GpodnetServiceException {
+        if (count < 1 || count > 100) {
+            throw new IllegalArgumentException("Count must be in range 1..100");
+        }
+        try {
+            URI uri = new URI(BASE_SCHEME, BASE_HOST, String.format(
+                    "/suggestions/%d.json", count), null);
+            HttpGet request = new HttpGet(uri);
+            String response = executeRequest(request);
+
+            JSONArray jsonArray = new JSONArray(response);
+            return readPodcastListFromJSONArray(jsonArray);
+        } catch (URISyntaxException e) {
+            e.printStackTrace();
+            throw new IllegalStateException(e);
+        } catch (JSONException e) {
+            e.printStackTrace();
+            throw new GpodnetServiceException(e);
+        }
+    }
+
+    /**
+     * Searches the podcast directory for a given string.
+     *
+     * @param query          The search query
+     * @param scaledLogoSize The size of the logos that are returned by the search query.
+     *                       Must be in range 1..256. If the value is out of range, the
+     *                       default value defined by the gpodder.net API will be used.
+     */
+    public List<GpodnetPodcast> searchPodcasts(String query, int scaledLogoSize)
+            throws GpodnetServiceException {
+        String parameters = (scaledLogoSize > 0 && scaledLogoSize <= 256) ? String
+                .format("q=%s&scale_logo=%d", query, scaledLogoSize) : String
+                .format("q=%s", query);
+        try {
+            URI uri = new URI(BASE_SCHEME, null, BASE_HOST, -1, "/search.json",
+                    parameters, null);
+            System.out.println(uri.toASCIIString());
+            HttpGet request = new HttpGet(uri);
+            String response = executeRequest(request);
+
+            JSONArray jsonArray = new JSONArray(response);
+            return readPodcastListFromJSONArray(jsonArray);
+
+        } catch (JSONException e) {
+            e.printStackTrace();
+            throw new GpodnetServiceException(e);
+        } catch (URISyntaxException e) {
+            e.printStackTrace();
+            throw new IllegalStateException(e);
+
+        }
+    }
+
+    /**
+     * Returns all devices of a given user.
+     * <p/>
+     * This method requires authentication.
+     *
+     * @param username The username. Must be the same user as the one which is
+     *                 currently logged in.
+     * @throws IllegalArgumentException              If username is null.
+     * @throws GpodnetServiceAuthenticationException If there is an authentication error.
+     */
+    public List<GpodnetDevice> getDevices(String username)
+            throws GpodnetServiceException {
+        if (username == null) {
+            throw new IllegalArgumentException("Username must not be null");
+        }
+        try {
+            URI uri = new URI(BASE_SCHEME, BASE_HOST, String.format(
+                    "/api/2/devices/%s.json", username), null);
+            HttpGet request = new HttpGet(uri);
+            String response = executeRequest(request);
+            JSONArray devicesArray = new JSONArray(response);
+            List<GpodnetDevice> result = readDeviceListFromJSONArray(devicesArray);
+
+            return result;
+        } catch (URISyntaxException e) {
+            e.printStackTrace();
+            throw new IllegalStateException(e);
+        } catch (JSONException e) {
+            e.printStackTrace();
+            throw new GpodnetServiceException(e);
+        }
+    }
+
+    /**
+     * Configures the device of a given user.
+     * <p/>
+     * This method requires authentication.
+     *
+     * @param username The username. Must be the same user as the one which is
+     *                 currently logged in.
+     * @param deviceId The ID of the device that should be configured.
+     * @throws IllegalArgumentException              If username or deviceId is null.
+     * @throws GpodnetServiceAuthenticationException If there is an authentication error.
+     */
+    public void configureDevice(String username, String deviceId,
+                                String caption, GpodnetDevice.DeviceType type)
+            throws GpodnetServiceException {
+        if (username == null || deviceId == null) {
+            throw new IllegalArgumentException(
+                    "Username and device ID must not be null");
+        }
+        try {
+            URI uri = new URI(BASE_SCHEME, BASE_HOST, String.format(
+                    "/api/2/devices/%s/%s.json", username, deviceId), null);
+            HttpPost request = new HttpPost(uri);
+            if (caption != null || type != null) {
+                JSONObject jsonContent = new JSONObject();
+                if (caption != null) {
+                    jsonContent.put("caption", caption);
+                }
+                if (type != null) {
+                    jsonContent.put("type", type.toString());
+                }
+                StringEntity strEntity = new StringEntity(
+                        jsonContent.toString(), "UTF-8");
+                strEntity.setContentType("application/json");
+                request.setEntity(strEntity);
+            }
+            executeRequest(request);
+        } catch (URISyntaxException e) {
+            e.printStackTrace();
+            throw new IllegalArgumentException(e);
+        } catch (UnsupportedEncodingException e) {
+            e.printStackTrace();
+            throw new IllegalStateException(e);
+        } catch (JSONException e) {
+            e.printStackTrace();
+            throw new GpodnetServiceException(e);
+        }
+    }
+
+    /**
+     * Returns the subscriptions of a specific device.
+     * <p/>
+     * This method requires authentication.
+     *
+     * @param username The username. Must be the same user as the one which is
+     *                 currently logged in.
+     * @param deviceId The ID of the device whose subscriptions should be returned.
+     * @return A list of subscriptions in OPML format.
+     * @throws IllegalArgumentException              If username or deviceId is null.
+     * @throws GpodnetServiceAuthenticationException If there is an authentication error.
+     */
+    public String getSubscriptionsOfDevice(String username, String deviceId)
+            throws GpodnetServiceException {
+        if (username == null || deviceId == null) {
+            throw new IllegalArgumentException(
+                    "Username and device ID must not be null");
+        }
+        try {
+            URI uri = new URI(BASE_SCHEME, BASE_HOST, String.format(
+                    "/subscriptions/%s/%s.opml", username, deviceId), null);
+            HttpGet request = new HttpGet(uri);
+            String response = executeRequest(request);
+            return response;
+        } catch (URISyntaxException e) {
+            e.printStackTrace();
+            throw new IllegalArgumentException(e);
+        }
+    }
+
+    /**
+     * Returns all subscriptions of a specific user.
+     * <p/>
+     * This method requires authentication.
+     *
+     * @param username The username. Must be the same user as the one which is
+     *                 currently logged in.
+     * @return A list of subscriptions in OPML format.
+     * @throws IllegalArgumentException              If username is null.
+     * @throws GpodnetServiceAuthenticationException If there is an authentication error.
+     */
+    public String getSubscriptionsOfUser(String username)
+            throws GpodnetServiceException {
+        if (username == null) {
+            throw new IllegalArgumentException("Username must not be null");
+        }
+        try {
+            URI uri = new URI(BASE_SCHEME, BASE_HOST, String.format(
+                    "/subscriptions/%s.opml", username), null);
+            HttpGet request = new HttpGet(uri);
+            String response = executeRequest(request);
+            return response;
+        } catch (URISyntaxException e) {
+            e.printStackTrace();
+            throw new IllegalArgumentException(e);
+        }
+    }
+
+    /**
+     * Uploads the subscriptions of a specific device.
+     * <p/>
+     * This method requires authentication.
+     *
+     * @param username      The username. Must be the same user as the one which is
+     *                      currently logged in.
+     * @param deviceId      The ID of the device whose subscriptions should be updated.
+     * @param subscriptions A list of feed URLs containing all subscriptions of the
+     *                      device.
+     * @throws IllegalArgumentException              If username, deviceId or subscriptions is null.
+     * @throws GpodnetServiceAuthenticationException If there is an authentication error.
+     */
+    public void uploadSubscriptions(String username, String deviceId,
+                                    List<String> subscriptions) throws GpodnetServiceException {
+        if (username == null || deviceId == null || subscriptions == null) {
+            throw new IllegalArgumentException(
+                    "Username, device ID and subscriptions must not be null");
+        }
+        try {
+            URI uri = new URI(BASE_SCHEME, BASE_HOST, String.format(
+                    "/subscriptions/%s/%s.txt", username, deviceId), null);
+            HttpPut request = new HttpPut(uri);
+            StringBuilder builder = new StringBuilder();
+            for (String s : subscriptions) {
+                builder.append(s);
+                builder.append("\n");
+            }
+            StringEntity entity = new StringEntity(builder.toString(), "UTF-8");
+            request.setEntity(entity);
+
+            executeRequest(request);
+        } catch (URISyntaxException e) {
+            e.printStackTrace();
+            throw new IllegalStateException(e);
+        } catch (UnsupportedEncodingException e) {
+            e.printStackTrace();
+            throw new IllegalStateException(e);
+        }
+    }
+
+    /**
+     * Updates the subscription list of a specific device.
+     * <p/>
+     * This method requires authentication.
+     *
+     * @param username The username. Must be the same user as the one which is
+     *                 currently logged in.
+     * @param deviceId The ID of the device whose subscriptions should be updated.
+     * @param added    Collection of feed URLs of added feeds. This Collection MUST NOT contain any duplicates
+     * @param removed  Collection of feed URLs of removed feeds. This Collection MUST NOT contain any duplicates
+     * @return a GpodnetUploadChangesResponse. See {@link de.danoeh.antennapod.gpoddernet.model.GpodnetUploadChangesResponse}
+     * for details.
+     * @throws java.lang.IllegalArgumentException                      if username, deviceId, added or removed is null.
+     * @throws de.danoeh.antennapod.gpoddernet.GpodnetServiceException if added or removed contain duplicates or if there
+     *                                                                 is an authentication error.
+     */
+    public GpodnetUploadChangesResponse uploadChanges(String username, String deviceId, Collection<String> added,
+                                                      Collection<String> removed) throws GpodnetServiceException {
+        if (username == null || deviceId == null || added == null || removed == null) {
+            throw new IllegalArgumentException(
+                    "Username, device ID, added and removed must not be null");
+        }
+        try {
+            URI uri = new URI(BASE_SCHEME, BASE_HOST, String.format(
+                    "/api/2/subscriptions/%s/%s.json", username, deviceId), null);
+
+            final JSONObject requestObject = new JSONObject();
+            requestObject.put("add", new JSONArray(added));
+            requestObject.put("remove", new JSONArray(removed));
+
+            HttpPost request = new HttpPost(uri);
+            StringEntity entity = new StringEntity(requestObject.toString(), "UTF-8");
+            request.setEntity(entity);
+
+            final String response = executeRequest(request);
+            return GpodnetUploadChangesResponse.fromJSONObject(response);
+        } catch (URISyntaxException e) {
+            e.printStackTrace();
+            throw new IllegalStateException(e);
+        } catch (JSONException e) {
+            e.printStackTrace();
+            throw new GpodnetServiceException(e);
+        } catch (UnsupportedEncodingException e) {
+            e.printStackTrace();
+            throw new IllegalStateException(e);
+        }
+
+    }
+
+    /**
+     * Returns all subscription changes of a specific device.
+     * <p/>
+     * This method requires authentication.
+     *
+     * @param username  The username. Must be the same user as the one which is
+     *                  currently logged in.
+     * @param deviceId  The ID of the device whose subscription changes should be
+     *                  downloaded.
+     * @param timestamp A timestamp that can be used to receive all changes since a
+     *                  specific point in time.
+     * @throws IllegalArgumentException              If username or deviceId is null.
+     * @throws GpodnetServiceAuthenticationException If there is an authentication error.
+     */
+    public GpodnetSubscriptionChange getSubscriptionChanges(String username,
+                                                            String deviceId, long timestamp) throws GpodnetServiceException {
+        if (username == null || deviceId == null) {
+            throw new IllegalArgumentException(
+                    "Username and device ID must not be null");
+        }
+        String params = String.format("since=%d", timestamp);
+        String path = String.format("/api/2/subscriptions/%s/%s.json",
+                username, deviceId);
+        try {
+            URI uri = new URI(BASE_SCHEME, null, BASE_HOST, -1, path, params,
+                    null);
+            HttpGet request = new HttpGet(uri);
+
+            String response = executeRequest(request);
+            JSONObject changes = new JSONObject(response);
+            return readSubscriptionChangesFromJSONObject(changes);
+        } catch (URISyntaxException e) {
+            e.printStackTrace();
+            throw new IllegalStateException(e);
+        } catch (JSONException e) {
+            e.printStackTrace();
+            throw new GpodnetServiceException(e);
+        }
+
+    }
+
+    /**
+     * Logs in a specific user. This method must be called if any of the methods
+     * that require authentication is used.
+     *
+     * @throws IllegalArgumentException If username or password is null.
+     */
+    public void authenticate(String username, String password)
+            throws GpodnetServiceException {
+        if (username == null || password == null) {
+            throw new IllegalArgumentException(
+                    "Username and password must not be null");
+        }
+        URI uri;
+        try {
+            uri = new URI(BASE_SCHEME, BASE_HOST, String.format(
+                    "/api/2/auth/%s/login.json", username), null);
+        } catch (URISyntaxException e) {
+            e.printStackTrace();
+            throw new GpodnetServiceException();
+        }
+        HttpPost request = new HttpPost(uri);
+        executeRequestWithAuthentication(request, username, password);
+    }
+
+    /**
+     * Shuts down the GpodnetService's HTTP client. The service will be shut down in a separate thread to avoid
+     * NetworkOnMainThreadExceptions.
+     */
+    public void shutdown() {
+        new Thread() {
+            @Override
+            public void run() {
+                httpClient.getConnectionManager().shutdown();
+            }
+        }.start();
+    }
+
+    private String executeRequest(HttpRequestBase request)
+            throws GpodnetServiceException {
+        if (request == null) {
+            throw new IllegalArgumentException("request must not be null");
+        }
+        String responseString = null;
+        HttpResponse response = null;
+        try {
+            response = httpClient.execute(request);
+            checkStatusCode(response);
+            responseString = getStringFromEntity(response.getEntity());
+        } catch (ClientProtocolException e) {
+            e.printStackTrace();
+            throw new GpodnetServiceException(e);
+        } catch (IOException e) {
+            e.printStackTrace();
+            throw new GpodnetServiceException(e);
+        } finally {
+            if (response != null) {
+                try {
+                    response.getEntity().consumeContent();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                    throw new GpodnetServiceException(e);
+                }
+            }
+
+        }
+        return responseString;
+    }
+
+    private String executeRequestWithAuthentication(HttpRequestBase request,
+                                                    String username, String password) throws GpodnetServiceException {
+        if (request == null || username == null || password == null) {
+            throw new IllegalArgumentException(
+                    "request and credentials must not be null");
+        }
+        String result = null;
+        HttpResponse response = null;
+        try {
+            Header auth = new BasicScheme().authenticate(
+                    new UsernamePasswordCredentials(username, password),
+                    request);
+            request.addHeader(auth);
+            response = httpClient.execute(request);
+            checkStatusCode(response);
+            result = getStringFromEntity(response.getEntity());
+        } catch (ClientProtocolException e) {
+            e.printStackTrace();
+            throw new GpodnetServiceException(e);
+        } catch (IOException e) {
+            e.printStackTrace();
+            throw new GpodnetServiceException(e);
+        } catch (AuthenticationException e) {
+            e.printStackTrace();
+            throw new GpodnetServiceException(e);
+        } finally {
+            if (response != null) {
+                try {
+                    response.getEntity().consumeContent();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                    throw new GpodnetServiceException(e);
+                }
+            }
+        }
+        return result;
+    }
+
+    private String getStringFromEntity(HttpEntity entity)
+            throws GpodnetServiceException {
+        if (entity == null) {
+            throw new IllegalArgumentException("entity must not be null");
+        }
+        ByteArrayOutputStream outputStream;
+        int contentLength = (int) entity.getContentLength();
+        if (contentLength > 0) {
+            outputStream = new ByteArrayOutputStream(contentLength);
+        } else {
+            outputStream = new ByteArrayOutputStream();
+        }
+        try {
+            byte[] buffer = new byte[8 * 1024];
+            InputStream in = entity.getContent();
+            int count;
+            while ((count = in.read(buffer)) > 0) {
+                outputStream.write(buffer, 0, count);
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+            throw new GpodnetServiceException(e);
+        }
+        // System.out.println(outputStream.toString());
+        return outputStream.toString();
+    }
+
+    private void checkStatusCode(HttpResponse response)
+            throws GpodnetServiceException {
+        if (response == null) {
+            throw new IllegalArgumentException("response must not be null");
+        }
+        int responseCode = response.getStatusLine().getStatusCode();
+        if (responseCode != HttpStatus.SC_OK) {
+            if (responseCode == HttpStatus.SC_UNAUTHORIZED) {
+                throw new GpodnetServiceAuthenticationException("Wrong username or password");
+            } else {
+                throw new GpodnetServiceBadStatusCodeException(
+                        "Bad response code: " + responseCode, responseCode);
+            }
+        }
+    }
+
+    private List<GpodnetPodcast> readPodcastListFromJSONArray(JSONArray array)
+            throws JSONException {
+        if (array == null) {
+            throw new IllegalArgumentException("array must not be null");
+        }
+        List<GpodnetPodcast> result = new ArrayList<GpodnetPodcast>(
+                array.length());
+        for (int i = 0; i < array.length(); i++) {
+            result.add(readPodcastFromJSONObject(array.getJSONObject(i)));
+        }
+        return result;
+
+    }
+
+    private GpodnetPodcast readPodcastFromJSONObject(JSONObject object)
+            throws JSONException {
+        String url = object.getString("url");
+
+        String title;
+        Object titleObj = object.opt("title");
+        if (titleObj != null && titleObj instanceof String) {
+            title = (String) titleObj;
+        } else {
+            title = url;
+        }
+
+        String description;
+        Object descriptionObj = object.opt("description");
+        if (descriptionObj != null && descriptionObj instanceof String) {
+            description = (String) descriptionObj;
+        } else {
+            description = "";
+        }
+
+        int subscribers = object.getInt("subscribers");
+
+        Object logoUrlObj = object.opt("logo_url");
+        String logoUrl = (logoUrlObj instanceof String) ? (String) logoUrlObj
+                : null;
+        if (logoUrl == null) {
+            Object scaledLogoUrl = object.opt("scaled_logo_url");
+            if (scaledLogoUrl != null && scaledLogoUrl instanceof String) {
+                logoUrl = (String) scaledLogoUrl;
+            }
+        }
+
+        String website = null;
+        Object websiteObj = object.opt("website");
+        if (websiteObj != null && websiteObj instanceof String) {
+            website = (String) websiteObj;
+        }
+        String mygpoLink = object.getString("mygpo_link");
+        return new GpodnetPodcast(url, title, description, subscribers,
+                logoUrl, website, mygpoLink);
+    }
+
+    private List<GpodnetDevice> readDeviceListFromJSONArray(JSONArray array)
+            throws JSONException {
+        if (array == null) {
+            throw new IllegalArgumentException("array must not be null");
+        }
+        List<GpodnetDevice> result = new ArrayList<GpodnetDevice>(
+                array.length());
+        for (int i = 0; i < array.length(); i++) {
+            result.add(readDeviceFromJSONObject(array.getJSONObject(i)));
+        }
+        return result;
+    }
+
+    private GpodnetDevice readDeviceFromJSONObject(JSONObject object)
+            throws JSONException {
+        String id = object.getString("id");
+        String caption = object.getString("caption");
+        String type = object.getString("type");
+        int subscriptions = object.getInt("subscriptions");
+        return new GpodnetDevice(id, caption, type, subscriptions);
+    }
+
+    private GpodnetSubscriptionChange readSubscriptionChangesFromJSONObject(
+            JSONObject object) throws JSONException {
+        if (object == null) {
+            throw new IllegalArgumentException("object must not be null");
+        }
+        List<String> added = new LinkedList<String>();
+        JSONArray jsonAdded = object.getJSONArray("add");
+        for (int i = 0; i < jsonAdded.length(); i++) {
+            added.add(jsonAdded.getString(i));
+        }
+
+        List<String> removed = new LinkedList<String>();
+        JSONArray jsonRemoved = object.getJSONArray("remove");
+        for (int i = 0; i < jsonRemoved.length(); i++) {
+            removed.add(jsonRemoved.getString(i));
+        }
+
+        long timestamp = object.getLong("timestamp");
+        return new GpodnetSubscriptionChange(added, removed, timestamp);
+    }
+}
diff --git a/src/de/danoeh/antennapod/gpoddernet/GpodnetServiceAuthenticationException.java b/src/de/danoeh/antennapod/gpoddernet/GpodnetServiceAuthenticationException.java
new file mode 100644
index 000000000..3b0140826
--- /dev/null
+++ b/src/de/danoeh/antennapod/gpoddernet/GpodnetServiceAuthenticationException.java
@@ -0,0 +1,21 @@
+package de.danoeh.antennapod.gpoddernet;
+
+public class GpodnetServiceAuthenticationException extends GpodnetServiceException {
+
+    public GpodnetServiceAuthenticationException() {
+        super();
+    }
+
+    public GpodnetServiceAuthenticationException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    public GpodnetServiceAuthenticationException(String message) {
+        super(message);
+    }
+
+    public GpodnetServiceAuthenticationException(Throwable cause) {
+        super(cause);
+    }
+
+}
diff --git a/src/de/danoeh/antennapod/gpoddernet/GpodnetServiceBadStatusCodeException.java b/src/de/danoeh/antennapod/gpoddernet/GpodnetServiceBadStatusCodeException.java
new file mode 100644
index 000000000..a32e9357b
--- /dev/null
+++ b/src/de/danoeh/antennapod/gpoddernet/GpodnetServiceBadStatusCodeException.java
@@ -0,0 +1,12 @@
+package de.danoeh.antennapod.gpoddernet;
+
+public class GpodnetServiceBadStatusCodeException extends GpodnetServiceException {
+    int statusCode;
+
+    public GpodnetServiceBadStatusCodeException(String message, int statusCode) {
+        super(message);
+        this.statusCode = statusCode;
+    }
+
+
+}
diff --git a/src/de/danoeh/antennapod/gpoddernet/GpodnetServiceException.java b/src/de/danoeh/antennapod/gpoddernet/GpodnetServiceException.java
new file mode 100644
index 000000000..bdb394454
--- /dev/null
+++ b/src/de/danoeh/antennapod/gpoddernet/GpodnetServiceException.java
@@ -0,0 +1,19 @@
+package de.danoeh.antennapod.gpoddernet;
+
+public class GpodnetServiceException extends Exception {
+
+    public GpodnetServiceException() {
+    }
+
+    public GpodnetServiceException(String message) {
+        super(message);
+    }
+
+    public GpodnetServiceException(Throwable cause) {
+        super(cause);
+    }
+
+    public GpodnetServiceException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}
diff --git a/src/de/danoeh/antennapod/gpoddernet/model/GpodnetDevice.java b/src/de/danoeh/antennapod/gpoddernet/model/GpodnetDevice.java
new file mode 100644
index 000000000..ae7199fcc
--- /dev/null
+++ b/src/de/danoeh/antennapod/gpoddernet/model/GpodnetDevice.java
@@ -0,0 +1,72 @@
+package de.danoeh.antennapod.gpoddernet.model;
+
+public class GpodnetDevice {
+
+    private String id;
+    private String caption;
+    private DeviceType type;
+    private int subscriptions;
+
+    public GpodnetDevice(String id, String caption, String type,
+                         int subscriptions) {
+        if (id == null) {
+            throw new IllegalArgumentException("ID must not be null");
+        }
+
+        this.id = id;
+        this.caption = caption;
+        this.type = DeviceType.fromString(type);
+        this.subscriptions = subscriptions;
+    }
+
+    @Override
+    public String toString() {
+        return "GpodnetDevice [id=" + id + ", caption=" + caption + ", type="
+                + type + ", subscriptions=" + subscriptions + "]";
+    }
+
+    public static enum DeviceType {
+        DESKTOP, LAPTOP, MOBILE, SERVER, OTHER;
+
+        static DeviceType fromString(String s) {
+            if (s == null) {
+                return OTHER;
+            }
+
+            if (s.equals("desktop")) {
+                return DESKTOP;
+            } else if (s.equals("laptop")) {
+                return LAPTOP;
+            } else if (s.equals("mobile")) {
+                return MOBILE;
+            } else if (s.equals("server")) {
+                return SERVER;
+            } else {
+                return OTHER;
+            }
+        }
+
+        @Override
+        public String toString() {
+            return super.toString().toLowerCase();
+        }
+
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public String getCaption() {
+        return caption;
+    }
+
+    public DeviceType getType() {
+        return type;
+    }
+
+    public int getSubscriptions() {
+        return subscriptions;
+    }
+
+}
diff --git a/src/de/danoeh/antennapod/gpoddernet/model/GpodnetPodcast.java b/src/de/danoeh/antennapod/gpoddernet/model/GpodnetPodcast.java
new file mode 100644
index 000000000..aa01b66e2
--- /dev/null
+++ b/src/de/danoeh/antennapod/gpoddernet/model/GpodnetPodcast.java
@@ -0,0 +1,64 @@
+package de.danoeh.antennapod.gpoddernet.model;
+
+public class GpodnetPodcast {
+    private String url;
+    private String title;
+    private String description;
+    private int subscribers;
+    private String logoUrl;
+    private String website;
+    private String mygpoLink;
+
+    public GpodnetPodcast(String url, String title, String description,
+                          int subscribers, String logoUrl, String website, String mygpoLink) {
+        if (url == null || title == null || description == null) {
+            throw new IllegalArgumentException(
+                    "URL, title and description must not be null");
+        }
+
+        this.url = url;
+        this.title = title;
+        this.description = description;
+        this.subscribers = subscribers;
+        this.logoUrl = logoUrl;
+        this.website = website;
+        this.mygpoLink = mygpoLink;
+    }
+
+    @Override
+    public String toString() {
+        return "GpodnetPodcast [url=" + url + ", title=" + title
+                + ", description=" + description + ", subscribers="
+                + subscribers + ", logoUrl=" + logoUrl + ", website=" + website
+                + ", mygpoLink=" + mygpoLink + "]";
+    }
+
+    public String getUrl() {
+        return url;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public int getSubscribers() {
+        return subscribers;
+    }
+
+    public String getLogoUrl() {
+        return logoUrl;
+    }
+
+    public String getWebsite() {
+        return website;
+    }
+
+    public String getMygpoLink() {
+        return mygpoLink;
+    }
+
+}
diff --git a/src/de/danoeh/antennapod/gpoddernet/model/GpodnetSubscriptionChange.java b/src/de/danoeh/antennapod/gpoddernet/model/GpodnetSubscriptionChange.java
new file mode 100644
index 000000000..dccb53e5d
--- /dev/null
+++ b/src/de/danoeh/antennapod/gpoddernet/model/GpodnetSubscriptionChange.java
@@ -0,0 +1,40 @@
+package de.danoeh.antennapod.gpoddernet.model;
+
+import java.util.List;
+
+public class GpodnetSubscriptionChange {
+    private List<String> added;
+    private List<String> removed;
+    private long timestamp;
+
+    public GpodnetSubscriptionChange(List<String> added, List<String> removed,
+                                     long timestamp) {
+        if (added == null || removed == null) {
+            throw new IllegalArgumentException(
+                    "added and remove must not be null");
+        }
+        this.added = added;
+        this.removed = removed;
+        this.timestamp = timestamp;
+    }
+
+    @Override
+    public String toString() {
+        return "GpodnetSubscriptionChange [added=" + added.toString()
+                + ", removed=" + removed.toString() + ", timestamp="
+                + timestamp + "]";
+    }
+
+    public List<String> getAdded() {
+        return added;
+    }
+
+    public List<String> getRemoved() {
+        return removed;
+    }
+
+    public long getTimestamp() {
+        return timestamp;
+    }
+
+}
diff --git a/src/de/danoeh/antennapod/gpoddernet/model/GpodnetTag.java b/src/de/danoeh/antennapod/gpoddernet/model/GpodnetTag.java
new file mode 100644
index 000000000..e8a36a554
--- /dev/null
+++ b/src/de/danoeh/antennapod/gpoddernet/model/GpodnetTag.java
@@ -0,0 +1,46 @@
+package de.danoeh.antennapod.gpoddernet.model;
+
+import java.util.Comparator;
+
+public class GpodnetTag {
+
+    private String name;
+    private int usage;
+
+    public GpodnetTag(String name, int usage) {
+        if (name == null) {
+            throw new IllegalArgumentException("Name must not be null");
+        }
+
+        this.name = name;
+        this.usage = usage;
+    }
+
+    public GpodnetTag(String name) {
+        super();
+        this.name = name;
+    }
+
+    @Override
+    public String toString() {
+        return "GpodnetTag [name=" + name + ", usage=" + usage + "]";
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getUsage() {
+        return usage;
+    }
+
+    public static class UsageComparator implements Comparator<GpodnetTag> {
+
+        @Override
+        public int compare(GpodnetTag o1, GpodnetTag o2) {
+            return o1.usage - o2.usage;
+        }
+
+    }
+
+}
diff --git a/src/de/danoeh/antennapod/gpoddernet/model/GpodnetUploadChangesResponse.java b/src/de/danoeh/antennapod/gpoddernet/model/GpodnetUploadChangesResponse.java
new file mode 100644
index 000000000..fee8c7d28
--- /dev/null
+++ b/src/de/danoeh/antennapod/gpoddernet/model/GpodnetUploadChangesResponse.java
@@ -0,0 +1,56 @@
+package de.danoeh.antennapod.gpoddernet.model;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Object returned by {@link de.danoeh.antennapod.gpoddernet.GpodnetService} in uploadChanges method.
+ */
+public class GpodnetUploadChangesResponse {
+
+    /**
+     * timestamp/ID that can be used for requesting changes since this upload.
+     */
+    public final long timestamp;
+
+    /**
+     * URLs that should be updated. The key of the map is the original URL, the value of the map
+     * is the sanitized URL.
+     */
+    public final Map<String, String> updatedUrls;
+
+    public GpodnetUploadChangesResponse(long timestamp, Map<String, String> updatedUrls) {
+        this.timestamp = timestamp;
+        this.updatedUrls = updatedUrls;
+    }
+
+    /**
+     * Creates a new GpodnetUploadChangesResponse-object from a JSON object that was
+     * returned by an uploadChanges call.
+     *
+     * @throws org.json.JSONException If the method could not parse the JSONObject.
+     */
+    public static GpodnetUploadChangesResponse fromJSONObject(String objectString) throws JSONException {
+        final JSONObject object = new JSONObject(objectString);
+        final long timestamp = object.getLong("timestamp");
+        Map<String, String> updatedUrls = new HashMap<String, String>();
+        JSONArray urls = object.getJSONArray("update_urls");
+        for (int i = 0; i < urls.length(); i++) {
+            JSONArray urlPair = urls.getJSONArray(i);
+            updatedUrls.put(urlPair.getString(0), urlPair.getString(1));
+        }
+        return new GpodnetUploadChangesResponse(timestamp, updatedUrls);
+    }
+
+    @Override
+    public String toString() {
+        return "GpodnetUploadChangesResponse{" +
+                "timestamp=" + timestamp +
+                ", updatedUrls=" + updatedUrls +
+                '}';
+    }
+}
diff --git a/src/de/danoeh/antennapod/preferences/GpodnetPreferences.java b/src/de/danoeh/antennapod/preferences/GpodnetPreferences.java
new file mode 100644
index 000000000..44b0f3cc3
--- /dev/null
+++ b/src/de/danoeh/antennapod/preferences/GpodnetPreferences.java
@@ -0,0 +1,217 @@
+package de.danoeh.antennapod.preferences;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.util.Log;
+import de.danoeh.antennapod.AppConfig;
+import de.danoeh.antennapod.PodcastApp;
+import de.danoeh.antennapod.service.GpodnetSyncService;
+
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.concurrent.locks.ReentrantLock;
+
+/**
+ * Manages preferences for accessing gpodder.net service
+ */
+public class GpodnetPreferences {
+
+    private static final String TAG = "GpodnetPreferences";
+
+    private static final String PREF_NAME = "gpodder.net";
+    public static final String PREF_GPODNET_USERNAME = "de.danoeh.antennapod.preferences.gpoddernet.username";
+    public static final String PREF_GPODNET_PASSWORD = "de.danoeh.antennapod.preferences.gpoddernet.password";
+    public static final String PREF_GPODNET_DEVICEID = "de.danoeh.antennapod.preferences.gpoddernet.deviceID";
+
+    public static final String PREF_LAST_SYNC_TIMESTAMP = "de.danoeh.antennapod.preferences.gpoddernet.last_sync_timestamp";
+    public static final String PREF_SYNC_ADDED = "de.danoeh.antennapod.preferences.gpoddernet.sync_added";
+    public static final String PREF_SYNC_REMOVED = "de.danoeh.antennapod.preferences.gpoddernet.sync_removed";
+
+    private static String username;
+    private static String password;
+    private static String deviceID;
+
+    private static ReentrantLock feedListLock = new ReentrantLock();
+    private static Set<String> addedFeeds;
+    private static Set<String> removedFeeds;
+
+    /**
+     * Last value returned by getSubscriptionChanges call. Will be used for all subsequent calls of getSubscriptionChanges.
+     */
+    private static long lastSyncTimestamp;
+
+    private static boolean preferencesLoaded = false;
+
+    private static SharedPreferences getPreferences() {
+        return PodcastApp.getInstance().getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE);
+    }
+
+    private static synchronized void ensurePreferencesLoaded() {
+        if (!preferencesLoaded) {
+            SharedPreferences prefs = getPreferences();
+            username = prefs.getString(PREF_GPODNET_USERNAME, null);
+            password = prefs.getString(PREF_GPODNET_PASSWORD, null);
+            deviceID = prefs.getString(PREF_GPODNET_DEVICEID, null);
+            lastSyncTimestamp = prefs.getLong(PREF_LAST_SYNC_TIMESTAMP, 0);
+            addedFeeds = readListFromString(prefs.getString(PREF_SYNC_ADDED, ""));
+            removedFeeds = readListFromString(prefs.getString(PREF_SYNC_REMOVED, ""));
+
+            preferencesLoaded = true;
+        }
+    }
+
+    private static void writePreference(String key, String value) {
+        SharedPreferences.Editor editor = getPreferences().edit();
+        editor.putString(key, value);
+        editor.commit();
+    }
+
+    private static void writePreference(String key, long value) {
+        SharedPreferences.Editor editor = getPreferences().edit();
+        editor.putLong(key, value);
+        editor.commit();
+    }
+
+    private static void writePreference(String key, Collection<String> value) {
+        SharedPreferences.Editor editor = getPreferences().edit();
+        editor.putString(key, writeListToString(value));
+        editor.commit();
+    }
+
+    public static String getUsername() {
+        ensurePreferencesLoaded();
+        return username;
+    }
+
+    public static void setUsername(String username) {
+        GpodnetPreferences.username = username;
+        writePreference(PREF_GPODNET_USERNAME, username);
+    }
+
+    public static String getPassword() {
+        ensurePreferencesLoaded();
+        return password;
+    }
+
+    public static void setPassword(String password) {
+        GpodnetPreferences.password = password;
+        writePreference(PREF_GPODNET_PASSWORD, password);
+    }
+
+    public static String getDeviceID() {
+        ensurePreferencesLoaded();
+        return deviceID;
+    }
+
+    public static void setDeviceID(String deviceID) {
+        GpodnetPreferences.deviceID = deviceID;
+        writePreference(PREF_GPODNET_DEVICEID, deviceID);
+    }
+
+    public static long getLastSyncTimestamp() {
+        ensurePreferencesLoaded();
+        return lastSyncTimestamp;
+    }
+
+    public static void setLastSyncTimestamp(long lastSyncTimestamp) {
+        GpodnetPreferences.lastSyncTimestamp = lastSyncTimestamp;
+        writePreference(PREF_LAST_SYNC_TIMESTAMP, lastSyncTimestamp);
+    }
+
+    public static void addAddedFeed(String feed) {
+        ensurePreferencesLoaded();
+        feedListLock.lock();
+        if (addedFeeds.add(feed)) {
+            writePreference(PREF_SYNC_ADDED, addedFeeds);
+        }
+        if (removedFeeds.remove(feed)) {
+            writePreference(PREF_SYNC_REMOVED, removedFeeds);
+        }
+        feedListLock.unlock();
+        GpodnetSyncService.sendSyncIntent(PodcastApp.getInstance());
+    }
+
+    public static void addRemovedFeed(String feed) {
+        ensurePreferencesLoaded();
+        feedListLock.lock();
+        if (removedFeeds.add(feed)) {
+            writePreference(PREF_SYNC_REMOVED, removedFeeds);
+        }
+        if (addedFeeds.remove(feed)) {
+            writePreference(PREF_SYNC_ADDED, addedFeeds);
+        }
+        feedListLock.unlock();
+        GpodnetSyncService.sendSyncIntent(PodcastApp.getInstance());
+    }
+
+    public static Set<String> getAddedFeedsCopy() {
+        ensurePreferencesLoaded();
+        Set<String> copy = new HashSet<String>();
+        feedListLock.lock();
+        copy.addAll(addedFeeds);
+        feedListLock.unlock();
+        return copy;
+    }
+
+    public static void removeAddedFeeds(Collection<String> removed) {
+        ensurePreferencesLoaded();
+        feedListLock.lock();
+        addedFeeds.removeAll(removed);
+        writePreference(PREF_SYNC_ADDED, addedFeeds);
+        feedListLock.unlock();
+    }
+
+    public static Set<String> getRemovedFeedsCopy() {
+        ensurePreferencesLoaded();
+        Set<String> copy = new HashSet<String>();
+        feedListLock.lock();
+        copy.addAll(removedFeeds);
+        feedListLock.unlock();
+        return copy;
+    }
+
+    public static void removeRemovedFeeds(Collection<String> removed) {
+        ensurePreferencesLoaded();
+        removedFeeds.removeAll(removed);
+        writePreference(PREF_SYNC_REMOVED, removedFeeds);
+
+    }
+
+    /**
+     * Returns true if device ID, username and password have a non-null value
+     */
+    public static boolean loggedIn() {
+        ensurePreferencesLoaded();
+        return deviceID != null && username != null && password != null;
+    }
+
+    public static synchronized void logout() {
+        if (AppConfig.DEBUG) Log.d(TAG, "Logout: Clearing preferences");
+        setUsername(null);
+        setPassword(null);
+        setDeviceID(null);
+        addedFeeds.clear();
+        writePreference(PREF_SYNC_ADDED, addedFeeds);
+        removedFeeds.clear();
+        writePreference(PREF_SYNC_REMOVED, removedFeeds);
+        setLastSyncTimestamp(0);
+    }
+
+    private static Set<String> readListFromString(String s) {
+        Set<String> result = new HashSet<String>();
+        for (String item : s.split(" ")) {
+            result.add(item);
+        }
+        return result;
+    }
+
+    private static String writeListToString(Collection<String> c) {
+        StringBuilder result = new StringBuilder();
+        for (String item : c) {
+            result.append(item);
+            result.append(" ");
+        }
+        return result.toString().trim();
+    }
+}
diff --git a/src/de/danoeh/antennapod/service/GpodnetSyncService.java b/src/de/danoeh/antennapod/service/GpodnetSyncService.java
new file mode 100644
index 000000000..71e128b55
--- /dev/null
+++ b/src/de/danoeh/antennapod/service/GpodnetSyncService.java
@@ -0,0 +1,243 @@
+package de.danoeh.antennapod.service;
+
+import android.app.Notification;
+import android.app.NotificationManager;
+import android.app.Service;
+import android.content.Context;
+import android.content.Intent;
+import android.os.IBinder;
+import android.support.v4.app.NotificationCompat;
+import android.util.Log;
+import de.danoeh.antennapod.AppConfig;
+import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.feed.Feed;
+import de.danoeh.antennapod.gpoddernet.GpodnetService;
+import de.danoeh.antennapod.gpoddernet.GpodnetServiceAuthenticationException;
+import de.danoeh.antennapod.gpoddernet.GpodnetServiceException;
+import de.danoeh.antennapod.gpoddernet.model.GpodnetSubscriptionChange;
+import de.danoeh.antennapod.gpoddernet.model.GpodnetUploadChangesResponse;
+import de.danoeh.antennapod.preferences.GpodnetPreferences;
+import de.danoeh.antennapod.storage.*;
+import de.danoeh.antennapod.util.NetworkUtils;
+
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Set;
+import java.util.concurrent.ExecutionException;
+
+/**
+ * Synchronizes local subscriptions with gpodder.net service. The service should be started with ACTION_SYNC as an action argument.
+ * This class also provides static methods for starting the GpodnetSyncService.
+ */
+public class GpodnetSyncService extends Service {
+    private static final String TAG = "GpodnetSyncService";
+
+    private static final long WAIT_INTERVAL = 5000L;
+
+    public static final String ARG_ACTION = "action";
+
+    public static final String ACTION_SYNC = "de.danoeh.antennapod.intent.action.sync";
+
+    private GpodnetService service;
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        final String action = (intent != null) ? intent.getStringExtra(ARG_ACTION) : null;
+        if (action != null && action.equals(ACTION_SYNC)) {
+            Log.d(TAG, String.format("Waiting %d milliseconds before uploading changes", WAIT_INTERVAL));
+            syncWaiterThread.restart();
+        } else {
+            Log.e(TAG, "Received invalid intent: action argument is null or invalid");
+        }
+        return START_FLAG_REDELIVERY;
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+        if (AppConfig.DEBUG) Log.d(TAG, "onDestroy");
+        syncWaiterThread.interrupt();
+
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
+
+    private synchronized GpodnetService tryLogin() throws GpodnetServiceException {
+        if (service == null) {
+            service = new GpodnetService();
+            service.authenticate(GpodnetPreferences.getUsername(), GpodnetPreferences.getPassword());
+        }
+        return service;
+    }
+
+    private synchronized void syncChanges() {
+        if (GpodnetPreferences.loggedIn() && NetworkUtils.networkAvailable(this)) {
+            final long timestamp = GpodnetPreferences.getLastSyncTimestamp();
+            try {
+                final List<String> localSubscriptions = DBReader.getFeedListDownloadUrls(this);
+                GpodnetService service = tryLogin();
+
+                if (timestamp == 0) {
+                    // first sync: download all subscriptions...
+                    GpodnetSubscriptionChange changes =
+                            service.getSubscriptionChanges(GpodnetPreferences.getUsername(), GpodnetPreferences.getDeviceID(), 0);
+                    if (AppConfig.DEBUG) Log.d(TAG, "Downloaded subscription changes: " + changes);
+                    processSubscriptionChanges(localSubscriptions, changes);
+
+                    // ... then upload all local subscriptions
+                    if (AppConfig.DEBUG) Log.d(TAG, "Uploading subscription list: " + localSubscriptions);
+                    GpodnetUploadChangesResponse uploadChangesResponse =
+                            service.uploadChanges(GpodnetPreferences.getUsername(), GpodnetPreferences.getDeviceID(), localSubscriptions, new LinkedList<String>());
+                    if (AppConfig.DEBUG) Log.d(TAG, "Uploading changes response: " + uploadChangesResponse);
+                    DBWriter.updateFeedDownloadURLs(GpodnetSyncService.this, uploadChangesResponse.updatedUrls).get();
+                    GpodnetPreferences.removeAddedFeeds(localSubscriptions);
+                    GpodnetPreferences.removeRemovedFeeds(GpodnetPreferences.getRemovedFeedsCopy());
+                    GpodnetPreferences.setLastSyncTimestamp(uploadChangesResponse.timestamp);
+                } else {
+                    Set<String> added = GpodnetPreferences.getAddedFeedsCopy();
+                    Set<String> removed = GpodnetPreferences.getRemovedFeedsCopy();
+
+                    // download remote changes first...
+                    GpodnetSubscriptionChange subscriptionChanges = service.getSubscriptionChanges(GpodnetPreferences.getUsername(), GpodnetPreferences.getDeviceID(), timestamp);
+                    if (AppConfig.DEBUG) Log.d(TAG, "Downloaded subscription changes: " + subscriptionChanges);
+                    processSubscriptionChanges(localSubscriptions, subscriptionChanges);
+
+                    // ... then upload changes local changes
+                    if (AppConfig.DEBUG) Log.d(TAG, String.format("Uploading subscriptions, Added: %s\nRemoved: %s",
+                            added.toString(), removed));
+                    GpodnetUploadChangesResponse uploadChangesResponse = service.uploadChanges(GpodnetPreferences.getUsername(), GpodnetPreferences.getDeviceID(), added, removed);
+                    if (AppConfig.DEBUG) Log.d(TAG, "Upload subscriptions response: " + uploadChangesResponse);
+
+                    GpodnetPreferences.removeAddedFeeds(added);
+                    GpodnetPreferences.removeRemovedFeeds(removed);
+                    DBWriter.updateFeedDownloadURLs(GpodnetSyncService.this, uploadChangesResponse.updatedUrls).get();
+                    GpodnetPreferences.setLastSyncTimestamp(uploadChangesResponse.timestamp);
+                }
+                clearErrorNotifications();
+            } catch (GpodnetServiceException e) {
+                e.printStackTrace();
+                updateErrorNotification(e);
+            } catch (DownloadRequestException e) {
+                e.printStackTrace();
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            } catch (ExecutionException e) {
+                e.printStackTrace();
+            }
+        }
+        stopSelf();
+    }
+
+    private synchronized void processSubscriptionChanges(List<String> localSubscriptions, GpodnetSubscriptionChange changes) throws DownloadRequestException {
+        for (String downloadUrl : changes.getAdded()) {
+            if (!localSubscriptions.contains(downloadUrl)) {
+                Feed feed = new Feed(downloadUrl, new Date());
+                DownloadRequester.getInstance().downloadFeed(this, feed);
+            }
+        }
+        for (String downloadUrl : changes.getRemoved()) {
+            DBTasks.removeFeedWithDownloadUrl(GpodnetSyncService.this, downloadUrl);
+        }
+    }
+
+    private void clearErrorNotifications() {
+        NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
+        nm.cancel(R.id.notification_gpodnet_sync_error);
+        nm.cancel(R.id.notification_gpodnet_sync_autherror);
+    }
+
+    private void updateErrorNotification(GpodnetServiceException exception) {
+        if (AppConfig.DEBUG) Log.d(TAG, "Posting error notification");
+
+        NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
+        final String title;
+        final String description;
+        final int id;
+        if (exception instanceof GpodnetServiceAuthenticationException) {
+            title = getString(R.string.gpodnetsync_auth_error_title);
+            description = getString(R.string.gpodnetsync_auth_error_descr);
+            id = R.id.notification_gpodnet_sync_autherror;
+        } else {
+            title = getString(R.string.gpodnetsync_error_title);
+            description = getString(R.string.gpodnetsync_error_descr) + exception.getMessage();
+            id = R.id.notification_gpodnet_sync_error;
+        }
+        Notification notification = builder.setContentTitle(title)
+                .setContentText(description)
+                .setSmallIcon(R.drawable.stat_notify_sync_error)
+                .setAutoCancel(true)
+                .build();
+        NotificationManager nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
+        nm.notify(id, notification);
+    }
+
+    private WaiterThread syncWaiterThread = new WaiterThread(WAIT_INTERVAL) {
+        @Override
+        public void onWaitCompleted() {
+            syncChanges();
+        }
+    };
+
+    private abstract class WaiterThread {
+        private long waitInterval;
+        private Thread thread;
+
+        private WaiterThread(long waitInterval) {
+            this.waitInterval = waitInterval;
+            reinit();
+        }
+
+        public abstract void onWaitCompleted();
+
+        public void exec() {
+            if (!thread.isAlive()) {
+                thread.start();
+            }
+        }
+
+        private void reinit() {
+            if (thread != null && thread.isAlive()) {
+                Log.d(TAG, "Interrupting waiter thread");
+                thread.interrupt();
+            }
+            thread = new Thread() {
+                @Override
+                public void run() {
+                    try {
+                        Thread.sleep(waitInterval);
+                    } catch (InterruptedException e) {
+                        e.printStackTrace();
+                    }
+                    if (!isInterrupted()) {
+                        synchronized (this) {
+                            onWaitCompleted();
+                        }
+                    }
+                }
+            };
+        }
+
+        public void restart() {
+            reinit();
+            exec();
+        }
+
+        public void interrupt() {
+            if (thread != null && thread.isAlive()) {
+                thread.interrupt();
+            }
+        }
+    }
+
+    public static void sendSyncIntent(Context context) {
+        if (GpodnetPreferences.loggedIn()) {
+            Intent intent = new Intent(context, GpodnetSyncService.class);
+            intent.putExtra(ARG_ACTION, ACTION_SYNC);
+            context.startService(intent);
+        }
+    }
+}
diff --git a/src/de/danoeh/antennapod/storage/DBReader.java b/src/de/danoeh/antennapod/storage/DBReader.java
index 28ab3d939..a5a4c8cd4 100644
--- a/src/de/danoeh/antennapod/storage/DBReader.java
+++ b/src/de/danoeh/antennapod/storage/DBReader.java
@@ -75,6 +75,27 @@ public final class DBReader {
         return feeds;
     }
 
+    /**
+     * Returns a list with the download URLs of all feeds.
+     * @param context A context that is used for opening the database connection.
+     * @return A list of Strings with the download URLs of all feeds.
+     * */
+    public static List<String> getFeedListDownloadUrls(final Context context) {
+        PodDBAdapter adapter = new PodDBAdapter(context);
+        List<String> result = new ArrayList<String>();
+        adapter.open();
+        Cursor feeds = adapter.getFeedCursorDownloadUrls();
+        if (feeds.moveToFirst()) {
+            do {
+                result.add(feeds.getString(1));
+            } while (feeds.moveToNext());
+        }
+        feeds.close();
+        adapter.close();
+
+        return result;
+    }
+
     /**
      * Returns a list of 'expired Feeds', i.e. Feeds that have not been updated for a certain amount of time.
      *
diff --git a/src/de/danoeh/antennapod/storage/DBTasks.java b/src/de/danoeh/antennapod/storage/DBTasks.java
index ba2e743a8..b9a1fd002 100644
--- a/src/de/danoeh/antennapod/storage/DBTasks.java
+++ b/src/de/danoeh/antennapod/storage/DBTasks.java
@@ -23,6 +23,7 @@ import de.danoeh.antennapod.feed.FeedImage;
 import de.danoeh.antennapod.feed.FeedItem;
 import de.danoeh.antennapod.feed.FeedMedia;
 import de.danoeh.antennapod.preferences.UserPreferences;
+import de.danoeh.antennapod.service.GpodnetSyncService;
 import de.danoeh.antennapod.service.PlaybackService;
 import de.danoeh.antennapod.service.download.DownloadStatus;
 import de.danoeh.antennapod.util.DownloadError;
@@ -40,6 +41,39 @@ public final class DBTasks {
     private DBTasks() {
     }
 
+    /**
+     * Removes the feed with the given download url. This method should NOT be executed on the GUI thread.
+     * @param context Used for accessing the db
+     * @param downloadUrl URL of the feed.
+     * */
+    public static void removeFeedWithDownloadUrl(Context context, String downloadUrl) {
+        PodDBAdapter adapter = new PodDBAdapter(context);
+        adapter.open();
+        Cursor cursor = adapter.getFeedCursorDownloadUrls();
+        long feedID = 0;
+        if (cursor.moveToFirst()) {
+            do {
+                if (cursor.getString(1).equals(downloadUrl)) {
+                    feedID = cursor.getLong(0);
+                }
+            } while (cursor.moveToNext());
+        }
+        cursor.close();
+        adapter.close();
+
+        if (feedID != 0) {
+            try {
+                DBWriter.deleteFeed(context, feedID).get();
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            } catch (ExecutionException e) {
+                e.printStackTrace();
+            }
+        } else {
+            Log.w(TAG, "removeFeedWithDownloadUrl: Could not find feed with url: " + downloadUrl);
+        }
+    }
+
     /**
      * Starts playback of a FeedMedia object's file. This method will build an Intent based on the given parameters to
      * start the {@link PlaybackService}.
@@ -111,6 +145,8 @@ public final class DBTasks {
                         refreshFeeds(context, DBReader.getFeedList(context));
                     }
                     isRefreshing.set(false);
+
+                    GpodnetSyncService.sendSyncIntent(context);
                 }
             }.start();
         } else {
diff --git a/src/de/danoeh/antennapod/storage/DBWriter.java b/src/de/danoeh/antennapod/storage/DBWriter.java
index 74d84ef20..d995424c4 100644
--- a/src/de/danoeh/antennapod/storage/DBWriter.java
+++ b/src/de/danoeh/antennapod/storage/DBWriter.java
@@ -4,6 +4,7 @@ import java.io.File;
 import java.util.Date;
 import java.util.LinkedList;
 import java.util.List;
+import java.util.Map;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
@@ -17,7 +18,9 @@ import android.preference.PreferenceManager;
 import android.util.Log;
 import de.danoeh.antennapod.AppConfig;
 import de.danoeh.antennapod.feed.*;
+import de.danoeh.antennapod.preferences.GpodnetPreferences;
 import de.danoeh.antennapod.preferences.PlaybackPreferences;
+import de.danoeh.antennapod.service.GpodnetSyncService;
 import de.danoeh.antennapod.service.PlaybackService;
 import de.danoeh.antennapod.service.download.DownloadStatus;
 import de.danoeh.antennapod.util.QueueAccess;
@@ -173,6 +176,8 @@ public class DBWriter {
                     }
                     adapter.removeFeed(feed);
                     adapter.close();
+
+                    GpodnetPreferences.addRemovedFeed(feed.getDownload_url());
                     EventDistributor.getInstance().sendFeedUpdateBroadcast();
                 }
             }
@@ -616,6 +621,7 @@ public class DBWriter {
                 adapter.setCompleteFeed(feed);
                 adapter.close();
 
+                GpodnetPreferences.addAddedFeed(feed.getDownload_url());
                 EventDistributor.getInstance().sendFeedUpdateBroadcast();
             }
         });
@@ -718,6 +724,26 @@ public class DBWriter {
         });
     }
 
+    /**
+     * Updates download URLs of feeds from a given Map. The key of the Map is the original URL of the feed
+     * and the value is the updated URL
+     * */
+    public static Future<?> updateFeedDownloadURLs(final Context context, final Map<String, String> urls) {
+        return dbExec.submit(new Runnable() {
+            @Override
+            public void run() {
+                PodDBAdapter adapter = new PodDBAdapter(context);
+                adapter.open();
+                for (String key : urls.keySet()) {
+                    if (AppConfig.DEBUG) Log.d(TAG, "Replacing URL " + key + " with url " + urls.get(key));
+
+                    adapter.setFeedDownloadUrl(key, urls.get(key));
+                }
+                adapter.close();
+            }
+        });
+    }
+
     private static boolean itemListContains(List<FeedItem> items, long itemId) {
         for (FeedItem item : items) {
             if (item.getId() == itemId) {
diff --git a/src/de/danoeh/antennapod/storage/PodDBAdapter.java b/src/de/danoeh/antennapod/storage/PodDBAdapter.java
index d36d6184c..6d41f6dfd 100644
--- a/src/de/danoeh/antennapod/storage/PodDBAdapter.java
+++ b/src/de/danoeh/antennapod/storage/PodDBAdapter.java
@@ -425,6 +425,15 @@ public class PodDBAdapter {
         db.endTransaction();
     }
 
+    /**
+     * Updates the download URL of a Feed.
+     */
+    public void setFeedDownloadUrl(String original, String updated) {
+        ContentValues values = new ContentValues();
+        values.put(KEY_DOWNLOAD_URL, updated);
+        db.update(TABLE_NAME_FEEDS, values, KEY_DOWNLOAD_URL + "=?", new String[]{original});
+    }
+
     public void setFeedItemlist(List<FeedItem> items) {
         db.beginTransaction();
         for (FeedItem item : items) {
@@ -659,6 +668,10 @@ public class PodDBAdapter {
         return c;
     }
 
+    public final Cursor getFeedCursorDownloadUrls() {
+        return db.query(TABLE_NAME_FEEDS, new String[]{KEY_ID, KEY_DOWNLOAD_URL}, null, null, null, null, null);
+    }
+
     public final Cursor getExpiredFeedsCursor(long expirationTime) {
         Cursor c = db.query(TABLE_NAME_FEEDS, null, "?<?", new String[]{
                 KEY_LASTUPDATE, String.valueOf(System.currentTimeMillis() - expirationTime)}, null, null,
diff --git a/src/de/danoeh/antennapod/util/NetworkUtils.java b/src/de/danoeh/antennapod/util/NetworkUtils.java
index de7b854cc..278f7ad7a 100644
--- a/src/de/danoeh/antennapod/util/NetworkUtils.java
+++ b/src/de/danoeh/antennapod/util/NetworkUtils.java
@@ -60,4 +60,10 @@ public class NetworkUtils {
 			Log.d(TAG, "Network for auto-dl is not available");
 		return false;
 	}
+
+    public static boolean networkAvailable(Context context) {
+        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
+        NetworkInfo info = cm.getActiveNetworkInfo();
+        return info != null && info.isConnected();
+    }
 }
diff --git a/src/instrumentationTest/de/test/antennapod/gpodnet/GPodnetServiceTest.java b/src/instrumentationTest/de/test/antennapod/gpodnet/GPodnetServiceTest.java
new file mode 100644
index 000000000..a96fc7aab
--- /dev/null
+++ b/src/instrumentationTest/de/test/antennapod/gpodnet/GPodnetServiceTest.java
@@ -0,0 +1,114 @@
+package instrumentationTest.de.test.antennapod.gpodnet;
+
+import android.test.AndroidTestCase;
+import android.util.Log;
+import de.danoeh.antennapod.gpoddernet.GpodnetService;
+import de.danoeh.antennapod.gpoddernet.GpodnetServiceException;
+import de.danoeh.antennapod.gpoddernet.model.GpodnetDevice;
+import de.danoeh.antennapod.gpoddernet.model.GpodnetTag;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * Test class for GpodnetService
+ */
+public class GPodnetServiceTest extends AndroidTestCase {
+
+    private GpodnetService service;
+
+    private static final String USER = "";
+    private static final String PW = "";
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+        service = new GpodnetService();
+    }
+
+    @Override
+    protected void tearDown() throws Exception {
+        super.tearDown();
+    }
+
+    private void authenticate() throws GpodnetServiceException {
+        service.authenticate(USER, PW);
+    }
+
+    public void testUploadSubscription() throws GpodnetServiceException {
+        authenticate();
+        ArrayList<String> l = new ArrayList<String>();
+        l.add("http://bitsundso.de/feed");
+        service.uploadSubscriptions(USER, "radio", l);
+    }
+
+    public void testUploadSubscription2() throws GpodnetServiceException {
+        authenticate();
+        ArrayList<String> l = new ArrayList<String>();
+        l.add("http://bitsundso.de/feed");
+        l.add("http://gamesundso.de/feed");
+        service.uploadSubscriptions(USER, "radio", l);
+    }
+
+    public void testUploadChanges() throws GpodnetServiceException {
+        authenticate();
+        String[] URLS = {"http://bitsundso.de/feed", "http://gamesundso.de/feed", "http://cre.fm/feed/mp3/", "http://freakshow.fm/feed/m4a/"};
+        List<String> subscriptions = Arrays.asList(URLS[0], URLS[1]);
+        List<String> removed = Arrays.asList(URLS[0]);
+        List<String> added = Arrays.asList(URLS[2], URLS[3]);
+        service.uploadSubscriptions(USER, "radio", subscriptions);
+        service.uploadChanges(USER, "radio", added, removed);
+    }
+
+    public void testGetSubscriptionChanges() throws GpodnetServiceException {
+        authenticate();
+        service.getSubscriptionChanges(USER, "radio", 1362322610L);
+    }
+
+    public void testGetSubscriptionsOfUser()
+            throws GpodnetServiceException {
+        authenticate();
+        service.getSubscriptionsOfUser(USER);
+    }
+
+    public void testGetSubscriptionsOfDevice()
+            throws GpodnetServiceException {
+        authenticate();
+        service.getSubscriptionsOfDevice(USER, "radio");
+    }
+
+    public void testConfigureDevices() throws GpodnetServiceException {
+        authenticate();
+        service.configureDevice(USER, "foo", "This is an updated caption",
+                GpodnetDevice.DeviceType.LAPTOP);
+    }
+
+    public void testGetDevices() throws GpodnetServiceException {
+        authenticate();
+        service.getDevices(USER);
+    }
+
+    public void testGetSuggestions() throws GpodnetServiceException {
+        authenticate();
+        service.getSuggestions(10);
+    }
+
+    public void testTags() throws GpodnetServiceException {
+        service.getTopTags(20);
+    }
+
+    public void testPodcastForTags() throws GpodnetServiceException {
+        List<GpodnetTag> tags = service.getTopTags(20);
+        service.getPodcastsForTag(tags.get(1),
+                10);
+    }
+
+    public void testSearch() throws GpodnetServiceException {
+        service.searchPodcasts("linux", 64);
+    }
+
+    public void testToplist() throws GpodnetServiceException {
+        service.getPodcastToplist(10);
+    }
+}