Added error activity if no external storage is available

res/layout/storage_error.xml

@@ -0,0 +1,24 @@
+<?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/imageView1"
+        android:layout_width="30dp"
+        android:layout_height="30dp"
+        android:layout_centerHorizontal="true"
+        android:layout_centerVertical="true"
+        android:layout_margin="16dp"
+        android:src="@android:drawable/stat_notify_sdcard_usb" />
+
+    <TextView
+        android:id="@+id/textView1"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_below="@+id/imageView1"
+        android:layout_centerHorizontal="true"
+        android:layout_margin="8dp"
+        android:text="@string/external_storage_error_msg" />
+
+</RelativeLayout>

res/values/strings.xml

@@ -93,5 +93,6 @@
     <string name="pref_mobileUpdate_sum">Allow updates over the mobile data connection</string>
     <string name="download_report_title">All downloads completed</string>
     <string name="refresh_label">Refresh</string>
+    <string name="external_storage_error_msg">No external storage is available. Please make sure that external storage is mounted so that the app can work properly.</string>
 
 </resources>

src/de/podfetcher/PodcastApp.java

@@ -13,6 +13,7 @@ import android.util.Log;
 import de.podfetcher.asynctask.FeedImageLoader;
 import de.podfetcher.feed.FeedManager;
 import de.podfetcher.receiver.FeedUpdateReceiver;
+import de.podfetcher.util.StorageUtils;
 
 public class PodcastApp extends Application implements
 		SharedPreferences.OnSharedPreferenceChangeListener {
@@ -39,8 +40,10 @@ public class PodcastApp extends Application implements
 		SharedPreferences prefs = PreferenceManager
 				.getDefaultSharedPreferences(this);
 		prefs.registerOnSharedPreferenceChangeListener(this);
-		FeedManager manager = FeedManager.getInstance();
+		if (StorageUtils.storageAvailable()) {
-		manager.loadDBData(getApplicationContext());
+			FeedManager manager = FeedManager.getInstance();
+			manager.loadDBData(getApplicationContext());
+		}
 	}
 
 	@Override
@@ -63,9 +66,8 @@ public class PodcastApp extends Application implements
 			alarmManager.cancel(updateIntent);
 			if (hours != 0) {
 				long newIntervall = TimeUnit.HOURS.toMillis(hours);
-				alarmManager.setRepeating(
+				alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,
-						AlarmManager.RTC_WAKEUP, newIntervall,
+						newIntervall, newIntervall, updateIntent);
-						newIntervall, updateIntent);
 				Log.d(TAG, "Changed alarm to new intervall");
 			} else {
 				Log.d(TAG, "Automatic update was deactivated");

src/de/podfetcher/activity/AddFeedActivity.java

@@ -20,6 +20,7 @@ import de.podfetcher.feed.FeedManager;
 import de.podfetcher.storage.DownloadRequester;
 import de.podfetcher.util.ConnectionTester;
 import de.podfetcher.util.DownloadError;
+import de.podfetcher.util.StorageUtils;
 import de.podfetcher.util.URLChecker;
 import de.podfetcher.service.DownloadService;
 
@@ -52,6 +53,7 @@ public class AddFeedActivity extends SherlockActivity {
 	@Override
 	protected void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
+		StorageUtils.checkStorageAvailability(this);
 		setContentView(R.layout.addfeed);
 
 		requester = DownloadRequester.getInstance();
@@ -96,6 +98,13 @@ public class AddFeedActivity extends SherlockActivity {
 		});
 	}
 
+	@Override
+	protected void onResume() {
+		super.onResume();
+		StorageUtils.checkStorageAvailability(this);
+
+	}
+
 	@Override
 	protected void onStop() {
 		super.onStop();

src/de/podfetcher/activity/FeedItemlistActivity.java

@@ -1,6 +1,5 @@
 package de.podfetcher.activity;
 
-
 import android.graphics.drawable.BitmapDrawable;
 import android.os.Bundle;
 import android.support.v4.app.FragmentManager;
@@ -21,6 +20,7 @@ import de.podfetcher.feed.FeedManager;
 import de.podfetcher.fragment.ItemlistFragment;
 import de.podfetcher.fragment.FeedlistFragment;
 import de.podfetcher.util.FeedMenuHandler;
+import de.podfetcher.util.StorageUtils;
 
 /** Displays a List of FeedItems */
 public class FeedItemlistActivity extends SherlockFragmentActivity {
@@ -35,30 +35,40 @@ public class FeedItemlistActivity extends SherlockFragmentActivity {
 	@Override
 	public void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
+		StorageUtils.checkStorageAvailability(this);
 		requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
 
 		getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 		setContentView(R.layout.feeditemlist_activity);
-		
+
 		manager = FeedManager.getInstance();
-		long feedId = getIntent().getLongExtra(FeedlistFragment.EXTRA_SELECTED_FEED, -1);
+		long feedId = getIntent().getLongExtra(
-		if(feedId == -1) Log.e(TAG, "Received invalid feed selection.");
+				FeedlistFragment.EXTRA_SELECTED_FEED, -1);
+		if (feedId == -1)
+			Log.e(TAG, "Received invalid feed selection.");
 
 		feed = manager.getFeed(feedId);
 		setTitle(feed.getTitle());
-		
+
 		FragmentManager fragmentManager = getSupportFragmentManager();
 		FragmentTransaction fT = fragmentManager.beginTransaction();
-	
+
 		filf = ItemlistFragment.newInstance(feed.getId());
 		fT.add(R.id.feeditemlistFragment, filf);
 		fT.commit();
-		
+
 	}
-	
+
+	@Override
+	protected void onResume() {
+		super.onResume();
+		StorageUtils.checkStorageAvailability(this);
+	}
+
 	@Override
 	public boolean onCreateOptionsMenu(Menu menu) {
-		return FeedMenuHandler.onCreateOptionsMenu(new MenuInflater(this), menu);
+		return FeedMenuHandler
+				.onCreateOptionsMenu(new MenuInflater(this), menu);
 	}
 
 	@Override
@@ -71,7 +81,7 @@ public class FeedItemlistActivity extends SherlockFragmentActivity {
 		if (FeedMenuHandler.onOptionsItemClicked(this, item, feed)) {
 			filf.getListAdapter().notifyDataSetChanged();
 		} else {
-			switch(item.getItemId()) {
+			switch (item.getItemId()) {
 			case R.id.remove_item:
 				FeedRemover remover = new FeedRemover(this) {
 					@Override
@@ -88,5 +98,5 @@ public class FeedItemlistActivity extends SherlockFragmentActivity {
 		}
 		return true;
 	}
-	
+
 }

src/de/podfetcher/activity/ItemviewActivity.java

@@ -24,6 +24,7 @@ import de.podfetcher.fragment.FeedlistFragment;
 import de.podfetcher.fragment.ItemDescriptionFragment;
 import de.podfetcher.fragment.ItemlistFragment;
 import de.podfetcher.util.FeedItemMenuHandler;
+import de.podfetcher.util.StorageUtils;
 
 /** Displays a single FeedItem and provides various actions */
 public class ItemviewActivity extends SherlockFragmentActivity {
@@ -39,12 +40,20 @@ public class ItemviewActivity extends SherlockFragmentActivity {
 	@Override
 	public void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
+		StorageUtils.checkStorageAvailability(this);
 		manager = FeedManager.getInstance();
 		requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
 		extractFeeditem();
 		populateUI();
 	}
 
+	@Override
+	protected void onResume() {
+		super.onResume();
+		StorageUtils.checkStorageAvailability(this);
+
+	}
+
 	@Override
 	public void onStop() {
 		super.onStop();
@@ -81,7 +90,8 @@ public class ItemviewActivity extends SherlockFragmentActivity {
 		FragmentManager fragmentManager = getSupportFragmentManager();
 		FragmentTransaction fragmentTransaction = fragmentManager
 				.beginTransaction();
-		ItemDescriptionFragment fragment = ItemDescriptionFragment.newInstance(item);
+		ItemDescriptionFragment fragment = ItemDescriptionFragment
+				.newInstance(item);
 		fragmentTransaction.add(R.id.description_fragment, fragment);
 		fragmentTransaction.commit();
 	}

src/de/podfetcher/activity/MediaplayerActivity.java

@@ -54,6 +54,7 @@ import de.podfetcher.service.PlayerStatus;
 import de.podfetcher.util.Converter;
 import de.podfetcher.util.DownloadError;
 import de.podfetcher.util.MediaPlayerError;
+import de.podfetcher.util.StorageUtils;
 
 public class MediaplayerActivity extends SherlockFragmentActivity implements
 		SurfaceHolder.Callback {
@@ -131,6 +132,7 @@ public class MediaplayerActivity extends SherlockFragmentActivity implements
 	protected void onResume() {
 		super.onResume();
 		Log.d(TAG, "Resuming Activity");
+		StorageUtils.checkStorageAvailability(this);
 		bindToService();
 
 	}
@@ -170,6 +172,7 @@ public class MediaplayerActivity extends SherlockFragmentActivity implements
 	protected void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
 		Log.d(TAG, "Creating Activity");
+		StorageUtils.checkStorageAvailability(this);
 
 		orientation = getResources().getConfiguration().orientation;
 		manager = FeedManager.getInstance();

src/de/podfetcher/activity/PodfetcherActivity.java

@@ -34,6 +34,7 @@ import de.podfetcher.fragment.QueueFragment;
 import de.podfetcher.fragment.UnreadItemlistFragment;
 import de.podfetcher.service.DownloadService;
 import de.podfetcher.storage.DownloadRequester;
+import de.podfetcher.util.StorageUtils;
 
 public class PodfetcherActivity extends SherlockFragmentActivity {
 	private static final String TAG = "PodfetcherActivity";
@@ -46,6 +47,7 @@ public class PodfetcherActivity extends SherlockFragmentActivity {
 	@Override
 	public void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
+		StorageUtils.checkStorageAvailability(this);
 		manager = FeedManager.getInstance();
 		requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
 		setContentView(R.layout.main);
@@ -69,6 +71,7 @@ public class PodfetcherActivity extends SherlockFragmentActivity {
 	@Override
 	protected void onResume() {
 		super.onResume();
+		StorageUtils.checkStorageAvailability(this);
 		updateProgressBarVisibility();
 		IntentFilter filter = new IntentFilter();
 		filter.addAction(DownloadService.ACTION_DOWNLOAD_HANDLED);

src/de/podfetcher/activity/StorageErrorActivity.java

@@ -0,0 +1,51 @@
+package de.podfetcher.activity;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.os.Bundle;
+import android.util.Log;
+
+import com.actionbarsherlock.app.SherlockActivity;
+
+import de.podfetcher.R;
+
+public class StorageErrorActivity extends SherlockActivity {
+	private static final String TAG = "StorageErrorActivity";
+	
+	@Override
+	protected void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.storage_error);
+	}
+
+	@Override
+	protected void onPause() {
+		super.onPause();
+		unregisterReceiver(mediaUpdate);
+	}
+
+	@Override
+	protected void onResume() {
+		super.onResume();
+		registerReceiver(mediaUpdate, new IntentFilter(Intent.ACTION_MEDIA_MOUNTED));
+	}
+	
+	private BroadcastReceiver mediaUpdate = new BroadcastReceiver() {
+
+		@Override
+		public void onReceive(Context context, Intent intent) {
+			if (intent.getAction().equals(Intent.ACTION_MEDIA_MOUNTED)) {
+				if (intent.getBooleanExtra("read-only", true)) {
+					Log.d(TAG, "Media was mounted; Finishing activity");
+					finish();
+				} else {
+					Log.d(TAG, "Media seemed to have been mounted read only");
+				}
+			}
+		}
+		
+	};
+	
+}

src/de/podfetcher/util/StorageUtils.java

@@ -0,0 +1,28 @@
+package de.podfetcher.util;
+
+import de.podfetcher.activity.StorageErrorActivity;
+import android.app.Activity;
+import android.content.Intent;
+import android.os.Environment;
+
+/** Utility functions for handling storage errors */
+public class StorageUtils {
+	public static boolean storageAvailable() {
+		String state = Environment.getExternalStorageState();
+		return state.equals(Environment.MEDIA_MOUNTED);
+	}
+	
+	/**Checks if external storage is available. If external storage isn't
+	 * available, the current activity is finsished an an error activity is launched.
+	 * @param activity the activity which would be finished if no storage is available
+	 * @return true if external storage is available
+	 */
+	public static boolean checkStorageAvailability(Activity activity) {
+		boolean storageAvailable = storageAvailable();
+		if (!storageAvailable) {
+			activity.finish();
+			activity.startActivity(new Intent(activity, StorageErrorActivity.class));
+		}
+		return storageAvailable;
+	}
+}