Add :ui:discovery module (#7037)

app/build.gradle

@@ -90,6 +90,7 @@ dependencies {
     implementation project(':storage:preferences')
     implementation project(':ui:app-start-intent')
     implementation project(':ui:common')
+    implementation project(':ui:discovery')
     implementation project(':ui:echo')
     implementation project(':ui:episodes')
     implementation project(':ui:glide')

app/src/main/AndroidManifest.xml

@@ -305,6 +305,10 @@
                 <data android:mimeType="text/plain"/>
             </intent-filter>
 
+            <intent-filter>
+                <category android:name="android.intent.category.DEFAULT" />
+                <action android:name="de.danoeh.antennapod.intents.ONLINE_FEEDVIEW" />
+            </intent-filter>
         </activity>
 
         <activity android:name=".activity.SelectSubscriptionActivity"

app/src/main/java/de/danoeh/antennapod/activity/MainActivity.java

@@ -63,6 +63,7 @@ import de.danoeh.antennapod.storage.importexport.AutomaticDatabaseExportWorker;
 import de.danoeh.antennapod.storage.preferences.UserPreferences;
 import de.danoeh.antennapod.ui.appstartintent.MainActivityStarter;
 import de.danoeh.antennapod.ui.common.ThemeUtils;
+import de.danoeh.antennapod.ui.discovery.DiscoveryFragment;
 import de.danoeh.antennapod.ui.home.HomeFragment;
 import de.danoeh.antennapod.view.LockableBottomSheetBehavior;
 import org.apache.commons.lang3.ArrayUtils;
@@ -87,7 +88,6 @@ public class MainActivity extends CastEnabledActivity {
 
     public static final String EXTRA_FEED_ID = "fragment_feed_id";
     public static final String EXTRA_REFRESH_ON_START = "refresh_on_start";
-    public static final String EXTRA_STARTED_FROM_SEARCH = "started_from_search";
     public static final String EXTRA_ADD_TO_BACK_STACK = "add_to_back_stack";
     public static final String KEY_GENERATED_VIEW_ID = "generated_view_id";
 
@@ -347,7 +347,7 @@ public class MainActivity extends CastEnabledActivity {
         return recycledViewPool;
     }
 
-    public void loadFragment(String tag, Bundle args) {
+    public Fragment createFragmentInstance(String tag, Bundle args) {
         Log.d(TAG, "loadFragment(tag: " + tag + ", args: " + args + ")");
         Fragment fragment;
         switch (tag) {
@@ -375,19 +375,24 @@ public class MainActivity extends CastEnabledActivity {
             case SubscriptionFragment.TAG:
                 fragment = new SubscriptionFragment();
                 break;
+            case DiscoveryFragment.TAG:
+                fragment = new DiscoveryFragment();
+                break;
             default:
                 // default to home screen
                 fragment = new HomeFragment();
-                tag = HomeFragment.TAG;
                 args = null;
                 break;
         }
-
         if (args != null) {
             fragment.setArguments(args);
         }
+        return fragment;
+    }
+
+    public void loadFragment(String tag, Bundle args) {
         NavDrawerFragment.saveLastNavFragment(this, tag);
-        loadFragment(fragment);
+        loadFragment(createFragmentInstance(tag, args));
     }
 
     public void loadFeedFragmentById(long feedId, Bundle args) {
@@ -399,7 +404,7 @@ public class MainActivity extends CastEnabledActivity {
         loadFragment(fragment);
     }
 
-    private void loadFragment(Fragment fragment) {
+    public void loadFragment(Fragment fragment) {
         FragmentManager fragmentManager = getSupportFragmentManager();
         // clear back stack
         for (int i = 0; i < fragmentManager.getBackStackEntryCount(); i++) {
@@ -591,9 +596,8 @@ public class MainActivity extends CastEnabledActivity {
             long feedId = intent.getLongExtra(EXTRA_FEED_ID, 0);
             Bundle args = intent.getBundleExtra(MainActivityStarter.EXTRA_FRAGMENT_ARGS);
             if (feedId > 0) {
-                boolean startedFromSearch = intent.getBooleanExtra(EXTRA_STARTED_FROM_SEARCH, false);
                 boolean addToBackStack = intent.getBooleanExtra(EXTRA_ADD_TO_BACK_STACK, false);
-                if (startedFromSearch || addToBackStack) {
+                if (addToBackStack) {
                     loadChildFragment(FeedItemlistFragment.newInstance(feedId));
                 } else {
                     loadFeedFragmentById(feedId, args);
@@ -604,7 +608,12 @@ public class MainActivity extends CastEnabledActivity {
             String tag = intent.getStringExtra(MainActivityStarter.EXTRA_FRAGMENT_TAG);
             Bundle args = intent.getBundleExtra(MainActivityStarter.EXTRA_FRAGMENT_ARGS);
             if (tag != null) {
-                loadFragment(tag, args);
+                Fragment fragment = createFragmentInstance(tag, args);
+                if (intent.getBooleanExtra(MainActivityStarter.EXTRA_ADD_TO_BACK_STACK, false)) {
+                    loadChildFragment(fragment);
+                } else {
+                    loadFragment(fragment);
+                }
             }
             sheetBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
         } else if (intent.getBooleanExtra(MainActivityStarter.EXTRA_OPEN_PLAYER, false)) {

app/src/main/java/de/danoeh/antennapod/activity/OnlineFeedViewActivity.java

@@ -12,7 +12,6 @@ import android.text.SpannableString;
 import android.text.TextUtils;
 import android.text.style.ForegroundColorSpan;
 import android.util.Log;
-import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.AdapterView;
@@ -23,13 +22,13 @@ import androidx.annotation.Nullable;
 import androidx.annotation.UiThread;
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import androidx.appcompat.app.AppCompatActivity;
-import androidx.core.app.NavUtils;
 import com.bumptech.glide.Glide;
 import com.bumptech.glide.request.RequestOptions;
 import com.google.android.material.snackbar.Snackbar;
 
 import de.danoeh.antennapod.R;
 import de.danoeh.antennapod.adapter.FeedItemlistDescriptionAdapter;
+import de.danoeh.antennapod.ui.appstartintent.MainActivityStarter;
 import de.danoeh.antennapod.ui.common.ThemeSwitcher;
 import de.danoeh.antennapod.core.service.download.DownloadRequestCreator;
 import de.danoeh.antennapod.net.discovery.FeedUrlNotFoundException;
@@ -85,6 +84,10 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 
+import static de.danoeh.antennapod.ui.appstartintent.OnlineFeedviewActivityStarter.ARG_FEEDURL;
+import static de.danoeh.antennapod.ui.appstartintent.OnlineFeedviewActivityStarter.ARG_STARTED_FROM_SEARCH;
+import static de.danoeh.antennapod.ui.appstartintent.OnlineFeedviewActivityStarter.ARG_WAS_MANUAL_URL;
+
 /**
  * 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
@@ -95,8 +98,6 @@ import java.util.Map;
  */
 public class OnlineFeedViewActivity extends AppCompatActivity {
 
-    public static final String ARG_FEEDURL = "arg.feedurl";
-    public static final String ARG_WAS_MANUAL_URL = "manual_url";
     private static final int RESULT_ERROR = 2;
     private static final String TAG = "OnlineFeedViewActivity";
     private static final String PREFS = "OnlineFeedViewActivityPreferences";
@@ -236,20 +237,6 @@ public class OnlineFeedViewActivity extends AppCompatActivity {
         overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out);
     }
 
-    @Override
-    public boolean onOptionsItemSelected(MenuItem item) {
-        if (item.getItemId() == android.R.id.home) {
-            Intent destIntent = new Intent(this, MainActivity.class);
-            if (NavUtils.shouldUpRecreateTask(this, destIntent)) {
-                startActivity(destIntent);
-            } else {
-                NavUtils.navigateUpFromSameTask(this);
-            }
-            return true;
-        }
-        return super.onOptionsItemSelected(item);
-    }
-
     private void lookupUrlAndDownload(String url) {
         download = PodcastSearcherRegistry.lookupUrl(url)
                 .subscribeOn(Schedulers.io())
@@ -521,13 +508,14 @@ public class OnlineFeedViewActivity extends AppCompatActivity {
     }
 
     private void openFeed() {
-        // feed.getId() is always 0, we have to retrieve the id from the feed list from
+        // feed.getId() is always 0, we have to retrieve the id from the feed list from the database
-        // the database
+        MainActivityStarter mainActivityStarter = new MainActivityStarter(this);
-        Intent intent = MainActivity.getIntentToOpenFeed(this, getFeedId());
+        mainActivityStarter.withOpenFeed(getFeedId());
-        intent.putExtra(MainActivity.EXTRA_STARTED_FROM_SEARCH,
+        if (getIntent().getBooleanExtra(ARG_STARTED_FROM_SEARCH, false)) {
-                getIntent().getBooleanExtra(MainActivity.EXTRA_STARTED_FROM_SEARCH, false));
+            mainActivityStarter.withAddToBackStack();
+        }
         finish();
-        startActivity(intent);
+        startActivity(mainActivityStarter.getIntent());
     }
 
     private void handleUpdatedFeedStatus() {

app/src/main/java/de/danoeh/antennapod/fragment/AddFeedFragment.java

@@ -25,7 +25,6 @@ import com.google.android.material.snackbar.Snackbar;
 
 import de.danoeh.antennapod.R;
 import de.danoeh.antennapod.activity.MainActivity;
-import de.danoeh.antennapod.activity.OnlineFeedViewActivity;
 import de.danoeh.antennapod.activity.OpmlImportActivity;
 import de.danoeh.antennapod.core.util.download.FeedUpdateManager;
 import de.danoeh.antennapod.model.feed.Feed;
@@ -38,6 +37,8 @@ import de.danoeh.antennapod.net.discovery.FyydPodcastSearcher;
 import de.danoeh.antennapod.net.discovery.GpodnetPodcastSearcher;
 import de.danoeh.antennapod.net.discovery.ItunesPodcastSearcher;
 import de.danoeh.antennapod.net.discovery.PodcastIndexPodcastSearcher;
+import de.danoeh.antennapod.ui.appstartintent.OnlineFeedviewActivityStarter;
+import de.danoeh.antennapod.ui.discovery.OnlineSearchFragment;
 import io.reactivex.Observable;
 import io.reactivex.android.schedulers.AndroidSchedulers;
 import io.reactivex.schedulers.Schedulers;
@@ -145,10 +146,7 @@ public class AddFeedFragment extends Fragment {
     }
 
     private void addUrl(String url) {
-        Intent intent = new Intent(getActivity(), OnlineFeedViewActivity.class);
+        startActivity(new OnlineFeedviewActivityStarter(getContext(), url).withManualUrl().getIntent());
-        intent.putExtra(OnlineFeedViewActivity.ARG_FEEDURL, url);
-        intent.putExtra(OnlineFeedViewActivity.ARG_WAS_MANUAL_URL, true);
-        startActivity(intent);
     }
 
     private void performSearch() {

app/src/main/java/de/danoeh/antennapod/fragment/SearchFragment.java

@@ -2,7 +2,6 @@ package de.danoeh.antennapod.fragment;
 
 
 import android.content.Context;
-import android.content.Intent;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Looper;
@@ -29,7 +28,6 @@ import com.leinardi.android.speeddial.SpeedDialView;
 
 import de.danoeh.antennapod.R;
 import de.danoeh.antennapod.activity.MainActivity;
-import de.danoeh.antennapod.activity.OnlineFeedViewActivity;
 import de.danoeh.antennapod.adapter.EpisodeItemListAdapter;
 import de.danoeh.antennapod.adapter.HorizontalFeedListAdapter;
 import de.danoeh.antennapod.core.menuhandler.MenuItemUtils;
@@ -46,6 +44,8 @@ import de.danoeh.antennapod.core.util.FeedItemUtil;
 import de.danoeh.antennapod.menuhandler.FeedItemMenuHandler;
 import de.danoeh.antennapod.net.discovery.CombinedSearcher;
 import de.danoeh.antennapod.storage.database.DBReader;
+import de.danoeh.antennapod.ui.appstartintent.OnlineFeedviewActivityStarter;
+import de.danoeh.antennapod.ui.discovery.OnlineSearchFragment;
 import de.danoeh.antennapod.view.EmptyViewHandler;
 import de.danoeh.antennapod.view.EpisodeItemListRecyclerView;
 import de.danoeh.antennapod.view.LiftOnScrollListener;
@@ -425,9 +425,7 @@ public class SearchFragment extends Fragment implements EpisodeItemListAdapter.O
         in.hideSoftInputFromWindow(searchView.getWindowToken(), 0);
         String query = searchView.getQuery().toString();
         if (query.matches("http[s]?://.*")) {
-            Intent intent = new Intent(getActivity(), OnlineFeedViewActivity.class);
+            startActivity(new OnlineFeedviewActivityStarter(getContext(), query).getIntent());
-            intent.putExtra(OnlineFeedViewActivity.ARG_FEEDURL, query);
-            startActivity(intent);
             return;
         }
         ((MainActivity) getActivity()).loadChildFragment(

app/src/main/res/layout/addfeed.xml

@@ -85,7 +85,7 @@
                 android:id="@+id/quickFeedDiscovery"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:name="de.danoeh.antennapod.fragment.QuickFeedDiscoveryFragment" />
+                android:name="de.danoeh.antennapod.ui.discovery.QuickFeedDiscoveryFragment" />
 
             <TextView
                 android:layout_width="match_parent"

settings.gradle

@@ -39,6 +39,7 @@ include ':storage:preferences'
 
 include ':ui:app-start-intent'
 include ':ui:common'
+include ':ui:discovery'
 include ':ui:echo'
 include ':ui:episodes'
 include ':ui:glide'

ui/app-start-intent/src/main/java/de/danoeh/antennapod/ui/appstartintent/OnlineFeedviewActivityStarter.java

@@ -0,0 +1,32 @@
+package de.danoeh.antennapod.ui.appstartintent;
+
+import android.content.Context;
+import android.content.Intent;
+
+public class OnlineFeedviewActivityStarter {
+    public static final String INTENT = "de.danoeh.antennapod.intents.ONLINE_FEEDVIEW";
+    public static final String ARG_FEEDURL = "arg.feedurl";
+    public static final String ARG_WAS_MANUAL_URL = "manual_url";
+    public static final String ARG_STARTED_FROM_SEARCH = "started_from_search";
+    private final Intent intent;
+
+    public OnlineFeedviewActivityStarter(Context context, String feedUrl) {
+        intent = new Intent(INTENT);
+        intent.setPackage(context.getPackageName());
+        intent.putExtra(ARG_FEEDURL, feedUrl);
+    }
+
+    public OnlineFeedviewActivityStarter withStartedFromSearch() {
+        intent.putExtra(ARG_STARTED_FROM_SEARCH, true);
+        return this;
+    }
+
+    public OnlineFeedviewActivityStarter withManualUrl() {
+        intent.putExtra(ARG_WAS_MANUAL_URL, true);
+        return this;
+    }
+
+    public Intent getIntent() {
+        return intent;
+    }
+}

ui/discovery/README.md

@@ -0,0 +1,3 @@
+# :ui:discovery
+
+This module provides the screens to discover new podcasts.

ui/discovery/build.gradle

@@ -0,0 +1,26 @@
+plugins {
+    id("com.android.library")
+}
+apply from: "../../common.gradle"
+apply from: "../../playFlavor.gradle"
+
+android {
+    namespace "de.danoeh.antennapod.ui.discovery"
+}
+
+dependencies {
+    implementation project(":event")
+    implementation project(":model")
+    implementation project(':net:discovery')
+    implementation project(':storage:database')
+    implementation project(':ui:app-start-intent')
+    implementation project(':ui:common')
+
+    annotationProcessor "androidx.annotation:annotation:$annotationVersion"
+    implementation "androidx.appcompat:appcompat:$appcompatVersion"
+    implementation "com.google.android.material:material:$googleMaterialVersion"
+    implementation "io.reactivex.rxjava2:rxandroid:$rxAndroidVersion"
+    implementation "io.reactivex.rxjava2:rxjava:$rxJavaVersion"
+    implementation "com.github.bumptech.glide:glide:$glideVersion"
+    implementation "org.greenrobot:eventbus:$eventbusVersion"
+}

ui/discovery/src/main/java/de/danoeh/antennapod/ui/discovery/DiscoveryFragment.java

@@ -1,7 +1,6 @@
-package de.danoeh.antennapod.fragment;
+package de.danoeh.antennapod.ui.discovery;
 
 import android.content.Context;
-import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.util.Log;
@@ -21,14 +20,12 @@ import com.google.android.material.appbar.MaterialToolbar;
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import com.google.android.material.textfield.MaterialAutoCompleteTextView;
 import com.google.android.material.textfield.TextInputLayout;
-import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.net.discovery.BuildConfig;
-import de.danoeh.antennapod.activity.OnlineFeedViewActivity;
-import de.danoeh.antennapod.adapter.itunes.ItunesAdapter;
-import de.danoeh.antennapod.core.BuildConfig;
 import de.danoeh.antennapod.storage.database.DBReader;
 import de.danoeh.antennapod.event.DiscoveryDefaultUpdateEvent;
 import de.danoeh.antennapod.net.discovery.ItunesTopListLoader;
 import de.danoeh.antennapod.net.discovery.PodcastSearchResult;
+import de.danoeh.antennapod.ui.appstartintent.OnlineFeedviewActivityStarter;
 import io.reactivex.Observable;
 import io.reactivex.android.schedulers.AndroidSchedulers;
 import io.reactivex.disposables.Disposable;
@@ -47,15 +44,14 @@ import java.util.Map;
  * Searches iTunes store for top podcasts and displays results in a list.
  */
 public class DiscoveryFragment extends Fragment implements Toolbar.OnMenuItemClickListener {
-
+    public static final String TAG = "DiscoveryFragment";
-    private static final String TAG = "ItunesSearchFragment";
     private static final int NUM_OF_TOP_PODCASTS = 25;
     private SharedPreferences prefs;
 
     /**
      * Adapter responsible with the search results.
      */
-    private ItunesAdapter adapter;
+    private OnlineSearchAdapter adapter;
     private GridView gridView;
     private ProgressBar progressBar;
     private TextView txtvError;
@@ -110,9 +106,9 @@ public class DiscoveryFragment extends Fragment implements Toolbar.OnMenuItemCli
     @Override
     public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
         // Inflate the layout for this fragment
-        View root = inflater.inflate(R.layout.fragment_itunes_search, container, false);
+        View root = inflater.inflate(R.layout.fragment_online_search, container, false);
         gridView = root.findViewById(R.id.gridView);
-        adapter = new ItunesAdapter(getActivity(), new ArrayList<>());
+        adapter = new OnlineSearchAdapter(getActivity(), new ArrayList<>());
         gridView.setAdapter(adapter);
 
         toolbar = root.findViewById(R.id.toolbar);
@@ -128,9 +124,7 @@ public class DiscoveryFragment extends Fragment implements Toolbar.OnMenuItemCli
             if (podcast.feedUrl == null) {
                 return;
             }
-            Intent intent = new Intent(getActivity(), OnlineFeedViewActivity.class);
+            startActivity(new OnlineFeedviewActivityStarter(getContext(), podcast.feedUrl).getIntent());
-            intent.putExtra(OnlineFeedViewActivity.ARG_FEEDURL, podcast.feedUrl);
-            startActivity(intent);
         });
 
         progressBar = root.findViewById(R.id.progressBar);

ui/discovery/src/main/java/de/danoeh/antennapod/ui/discovery/FeedDiscoverAdapter.java

@@ -1,5 +1,6 @@
-package de.danoeh.antennapod.adapter;
+package de.danoeh.antennapod.ui.discovery;
 
+import android.content.Context;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.BaseAdapter;
@@ -8,21 +9,18 @@ import com.bumptech.glide.Glide;
 import com.bumptech.glide.load.resource.bitmap.FitCenter;
 import com.bumptech.glide.load.resource.bitmap.RoundedCorners;
 import com.bumptech.glide.request.RequestOptions;
-import de.danoeh.antennapod.R;
-import de.danoeh.antennapod.activity.MainActivity;
 import de.danoeh.antennapod.net.discovery.PodcastSearchResult;
 
-import java.lang.ref.WeakReference;
 import java.util.ArrayList;
 import java.util.List;
 
 public class FeedDiscoverAdapter extends BaseAdapter {
 
-    private final WeakReference<MainActivity> mainActivityRef;
     private final List<PodcastSearchResult> data = new ArrayList<>();
+    private final Context context;
 
-    public FeedDiscoverAdapter(MainActivity mainActivity) {
+    public FeedDiscoverAdapter(Context context) {
-        this.mainActivityRef = new WeakReference<>(mainActivity);
+        this.context = context;
     }
 
     public void updateData(List<PodcastSearchResult> newData) {
@@ -51,7 +49,7 @@ public class FeedDiscoverAdapter extends BaseAdapter {
         Holder holder;
 
         if (convertView == null) {
-            convertView = View.inflate(mainActivityRef.get(), R.layout.quick_feed_discovery_item, null);
+            convertView = View.inflate(context, R.layout.quick_feed_discovery_item, null);
             holder = new Holder();
             holder.imageView = convertView.findViewById(R.id.discovery_cover);
             convertView.setTag(holder);
@@ -63,12 +61,12 @@ public class FeedDiscoverAdapter extends BaseAdapter {
         final PodcastSearchResult podcast = getItem(position);
         holder.imageView.setContentDescription(podcast.title);
 
-        Glide.with(mainActivityRef.get())
+        Glide.with(context)
                 .load(podcast.imageUrl)
                 .apply(new RequestOptions()
                         .placeholder(R.color.light_gray)
                         .transform(new FitCenter(), new RoundedCorners((int)
-                                (8 * mainActivityRef.get().getResources().getDisplayMetrics().density)))
+                                (8 * context.getResources().getDisplayMetrics().density)))
                         .dontAnimate())
                 .into(holder.imageView);
 

ui/discovery/src/main/java/de/danoeh/antennapod/ui/discovery/OnlineSearchAdapter.java

@@ -1,4 +1,4 @@
-package de.danoeh.antennapod.adapter.itunes;
+package de.danoeh.antennapod.ui.discovery;
 
 import android.content.Context;
 import android.widget.ArrayAdapter;
@@ -17,11 +17,9 @@ import com.bumptech.glide.request.RequestOptions;
 
 import java.util.List;
 
-import de.danoeh.antennapod.R;
-import de.danoeh.antennapod.activity.MainActivity;
 import de.danoeh.antennapod.net.discovery.PodcastSearchResult;
 
-public class ItunesAdapter extends ArrayAdapter<PodcastSearchResult> {
+public class OnlineSearchAdapter extends ArrayAdapter<PodcastSearchResult> {
     /**
      * Related Context
      */
@@ -38,7 +36,7 @@ public class ItunesAdapter extends ArrayAdapter<PodcastSearchResult> {
      * @param context Related context
      * @param objects Search result
      */
-    public ItunesAdapter(Context context, List<PodcastSearchResult> objects) {
+    public OnlineSearchAdapter(Context context, List<PodcastSearchResult> objects) {
         super(context, 0, objects);
         this.data = objects;
         this.context = context;
@@ -57,9 +55,8 @@ public class ItunesAdapter extends ArrayAdapter<PodcastSearchResult> {
         View view;
 
         //Handle view holder stuff
-        if(convertView == null) {
+        if (convertView == null) {
-            view = ((MainActivity) context).getLayoutInflater()
+            view = View.inflate(context, R.layout.online_search_listitem, null);
-                    .inflate(R.layout.itunes_podcast_listitem, parent, false);
             viewHolder = new PodcastViewHolder(view);
             view.setTag(viewHolder);
         } else {
@@ -116,7 +113,7 @@ public class ItunesAdapter extends ArrayAdapter<PodcastSearchResult> {
          * Constructor
          * @param view GridView cell
          */
-        PodcastViewHolder(View view){
+        PodcastViewHolder(View view) {
             coverView = view.findViewById(R.id.imgvCover);
             titleView = view.findViewById(R.id.txtvTitle);
             authorView = view.findViewById(R.id.txtvAuthor);

ui/discovery/src/main/java/de/danoeh/antennapod/ui/discovery/OnlineSearchFragment.java

@@ -1,7 +1,6 @@
-package de.danoeh.antennapod.fragment;
+package de.danoeh.antennapod.ui.discovery;
 
 import android.content.Context;
-import android.content.Intent;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.LayoutInflater;
@@ -23,13 +22,10 @@ import com.google.android.material.appbar.MaterialToolbar;
 import java.util.ArrayList;
 import java.util.List;
 
-import de.danoeh.antennapod.R;
-import de.danoeh.antennapod.activity.MainActivity;
-import de.danoeh.antennapod.activity.OnlineFeedViewActivity;
-import de.danoeh.antennapod.adapter.itunes.ItunesAdapter;
 import de.danoeh.antennapod.net.discovery.PodcastSearchResult;
 import de.danoeh.antennapod.net.discovery.PodcastSearcher;
 import de.danoeh.antennapod.net.discovery.PodcastSearcherRegistry;
+import de.danoeh.antennapod.ui.appstartintent.OnlineFeedviewActivityStarter;
 import io.reactivex.disposables.Disposable;
 
 public class OnlineSearchFragment extends Fragment {
@@ -41,7 +37,7 @@ public class OnlineSearchFragment extends Fragment {
     /**
      * Adapter responsible with the search results
      */
-    private ItunesAdapter adapter;
+    private OnlineSearchAdapter adapter;
     private PodcastSearcher searchProvider;
     private GridView gridView;
     private ProgressBar progressBar;
@@ -93,18 +89,16 @@ public class OnlineSearchFragment extends Fragment {
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
         // Inflate the layout for this fragment
-        View root = inflater.inflate(R.layout.fragment_itunes_search, container, false);
+        View root = inflater.inflate(R.layout.fragment_online_search, container, false);
         gridView = root.findViewById(R.id.gridView);
-        adapter = new ItunesAdapter(getActivity(), new ArrayList<>());
+        adapter = new OnlineSearchAdapter(getActivity(), new ArrayList<>());
         gridView.setAdapter(adapter);
 
         //Show information about the podcast when the list item is clicked
         gridView.setOnItemClickListener((parent, view1, position, id) -> {
             PodcastSearchResult podcast = searchResults.get(position);
-            Intent intent = new Intent(getActivity(), OnlineFeedViewActivity.class);
+            startActivity(new OnlineFeedviewActivityStarter(getContext(), podcast.feedUrl)
-            intent.putExtra(OnlineFeedViewActivity.ARG_FEEDURL, podcast.feedUrl);
+                    .withStartedFromSearch().getIntent());
-            intent.putExtra(MainActivity.EXTRA_STARTED_FROM_SEARCH, true);
-            startActivity(intent);
         });
         progressBar = root.findViewById(R.id.progressBar);
         txtvError = root.findViewById(R.id.txtvError);

ui/discovery/src/main/java/de/danoeh/antennapod/ui/discovery/QuickFeedDiscoveryFragment.java

@@ -1,6 +1,5 @@
-package de.danoeh.antennapod.fragment;
+package de.danoeh.antennapod.ui.discovery;
 
-import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.text.TextUtils;
@@ -16,15 +15,13 @@ import android.widget.GridView;
 import android.widget.LinearLayout;
 import android.widget.TextView;
 import androidx.fragment.app.Fragment;
-import de.danoeh.antennapod.BuildConfig;
+import de.danoeh.antennapod.net.discovery.BuildConfig;
-import de.danoeh.antennapod.R;
-import de.danoeh.antennapod.activity.MainActivity;
-import de.danoeh.antennapod.activity.OnlineFeedViewActivity;
-import de.danoeh.antennapod.adapter.FeedDiscoverAdapter;
 import de.danoeh.antennapod.storage.database.DBReader;
 import de.danoeh.antennapod.event.DiscoveryDefaultUpdateEvent;
 import de.danoeh.antennapod.net.discovery.ItunesTopListLoader;
 import de.danoeh.antennapod.net.discovery.PodcastSearchResult;
+import de.danoeh.antennapod.ui.appstartintent.MainActivityStarter;
+import de.danoeh.antennapod.ui.appstartintent.OnlineFeedviewActivityStarter;
 import io.reactivex.Observable;
 import io.reactivex.android.schedulers.AndroidSchedulers;
 import io.reactivex.disposables.Disposable;
@@ -57,8 +54,10 @@ public class QuickFeedDiscoveryFragment extends Fragment implements AdapterView.
         super.onCreateView(inflater, container, savedInstanceState);
         View root = inflater.inflate(R.layout.quick_feed_discovery, container, false);
         View discoverMore = root.findViewById(R.id.discover_more);
-        discoverMore.setOnClickListener(v ->
+        discoverMore.setOnClickListener(v -> startActivity(new MainActivityStarter(getContext())
-                ((MainActivity) getActivity()).loadChildFragment(new DiscoveryFragment()));
+                .withFragmentLoaded(DiscoveryFragment.TAG)
+                .withAddToBackStack()
+                .getIntent()));
 
         discoverGridLayout = root.findViewById(R.id.discover_grid);
         errorView = root.findViewById(R.id.discover_error);
@@ -66,7 +65,7 @@ public class QuickFeedDiscoveryFragment extends Fragment implements AdapterView.
         errorRetry = root.findViewById(R.id.discover_error_retry_btn);
         poweredByTextView = root.findViewById(R.id.discover_powered_by_itunes);
 
-        adapter = new FeedDiscoverAdapter((MainActivity) getActivity());
+        adapter = new FeedDiscoverAdapter(getActivity());
         discoverGridLayout.setAdapter(adapter);
         discoverGridLayout.setOnItemClickListener(this);
 
@@ -171,8 +170,6 @@ public class QuickFeedDiscoveryFragment extends Fragment implements AdapterView.
         if (TextUtils.isEmpty(podcast.feedUrl)) {
             return;
         }
-        Intent intent = new Intent(getActivity(), OnlineFeedViewActivity.class);
+        startActivity(new OnlineFeedviewActivityStarter(getContext(), podcast.feedUrl).getIntent());
-        intent.putExtra(OnlineFeedViewActivity.ARG_FEEDURL, podcast.feedUrl);
-        startActivity(intent);
     }
 }

ui/discovery/src/main/res/layout/fragment_online_search.xml

@@ -40,7 +40,7 @@
         android:paddingTop="@dimen/list_vertical_padding"
         android:stretchMode="columnWidth"
         android:verticalSpacing="8dp"
-        tools:listitem="@layout/itunes_podcast_listitem" />
+        tools:listitem="@layout/online_search_listitem" />
 
     <TextView
         android:id="@android:id/empty"

ui/discovery/src/main/res/layout/quick_feed_discovery.xml

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
@@ -46,8 +45,8 @@
             android:layout_marginTop="8dp"
             android:layout_centerInParent="true"
             android:layout_gravity="center_horizontal"
-            app:layout_columnWeight="1"
+            android:layout_columnWeight="1"
-            app:layout_rowWeight="1" />
+            android:layout_rowWeight="1" />
 
         <LinearLayout
             android:id="@+id/discover_error"