Don't cast class to MainActivity to show message (#7771)

We can do that using an event.
This commit fixes one of the most prominent crashes on Google Play
where we cast the OnlineFeedViewActivity to MainActivity.

app/src/androidTest/java/de/test/antennapod/ui/FeedSettingsTest.java

@@ -7,6 +7,7 @@ import androidx.test.platform.app.InstrumentationRegistry;
 import de.danoeh.antennapod.R;
 import de.danoeh.antennapod.activity.MainActivity;
 import de.danoeh.antennapod.model.feed.Feed;
+import de.danoeh.antennapod.ui.appstartintent.MainActivityStarter;
 import de.test.antennapod.EspressoTestUtils;
 import org.junit.After;
 import org.junit.Before;
@@ -44,7 +45,7 @@ public class FeedSettingsTest {
         uiTestUtils.addLocalFeedData(false);
         feed = uiTestUtils.hostedFeeds.get(0);
         Intent intent = new Intent(InstrumentationRegistry.getInstrumentation().getTargetContext(), MainActivity.class);
-        intent.putExtra(MainActivity.EXTRA_FEED_ID, feed.getId());
+        intent.putExtra(MainActivityStarter.EXTRA_FEED_ID, feed.getId());
         activityRule.launchActivity(intent);
     }
 

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

@@ -1,6 +1,5 @@
 package de.danoeh.antennapod.activity;
 
-import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.res.Configuration;
@@ -97,7 +96,6 @@ public class MainActivity extends CastEnabledActivity {
     public static final String PREF_NAME = "MainActivityPrefs";
     public static final String PREF_IS_FIRST_LAUNCH = "prefMainActivityIsFirstLaunch";
 
-    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 KEY_GENERATED_VIEW_ID = "generated_view_id";
 
@@ -112,14 +110,6 @@ public class MainActivity extends CastEnabledActivity {
     private int lastTheme = 0;
     private Insets systemBarInsets = Insets.NONE;
 
-    @NonNull
-    public static Intent getIntentToOpenFeed(@NonNull Context context, long feedId) {
-        Intent intent = new Intent(context.getApplicationContext(), MainActivity.class);
-        intent.putExtra(MainActivity.EXTRA_FEED_ID, feedId);
-        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
-        return intent;
-    }
-
     @Override
     public void onCreate(Bundle savedInstanceState) {
         lastTheme = ThemeSwitcher.getNoTitleTheme(this);
@@ -651,8 +641,17 @@ public class MainActivity extends CastEnabledActivity {
     @Subscribe(threadMode = ThreadMode.MAIN)
     public void onEventMainThread(MessageEvent event) {
         Log.d(TAG, "onEvent(" + event + ")");
+        Snackbar snackbar;
+        if (getBottomSheet().getState() == BottomSheetBehavior.STATE_COLLAPSED) {
+            snackbar = Snackbar.make(findViewById(R.id.main_content_view), event.message, Snackbar.LENGTH_LONG);
+            if (findViewById(R.id.audioplayerFragment).getVisibility() == View.VISIBLE) {
+                snackbar.setAnchorView(findViewById(R.id.audioplayerFragment));
+            }
+        } else {
+            snackbar = Snackbar.make(findViewById(android.R.id.content), event.message, Snackbar.LENGTH_LONG);
+        }
+        snackbar.show();
 
-        Snackbar snackbar = showSnackbarAbovePlayer(event.message, Snackbar.LENGTH_LONG);
         if (event.action != null) {
             snackbar.setAction(event.actionText, v -> event.action.accept(this));
         }
@@ -661,8 +660,8 @@ public class MainActivity extends CastEnabledActivity {
     private void handleNavIntent() {
         Log.d(TAG, "handleNavIntent()");
         Intent intent = getIntent();
-        if (intent.hasExtra(EXTRA_FEED_ID)) {
+        if (intent.hasExtra(MainActivityStarter.EXTRA_FEED_ID)) {
-            long feedId = intent.getLongExtra(EXTRA_FEED_ID, 0);
+            long feedId = intent.getLongExtra(MainActivityStarter.EXTRA_FEED_ID, 0);
             Bundle args = intent.getBundleExtra(MainActivityStarter.EXTRA_FRAGMENT_ARGS);
             if (feedId > 0) {
                 if (intent.getBooleanExtra(MainActivityStarter.EXTRA_CLEAR_BACK_STACK, false)) {
@@ -710,24 +709,6 @@ public class MainActivity extends CastEnabledActivity {
         handleNavIntent();
     }
 
-    public Snackbar showSnackbarAbovePlayer(CharSequence text, int duration) {
-        Snackbar s;
-        if (getBottomSheet().getState() == BottomSheetBehavior.STATE_COLLAPSED) {
-            s = Snackbar.make(findViewById(R.id.main_content_view), text, duration);
-            if (findViewById(R.id.audioplayerFragment).getVisibility() == View.VISIBLE) {
-                s.setAnchorView(findViewById(R.id.audioplayerFragment));
-            }
-        } else {
-            s = Snackbar.make(findViewById(android.R.id.content), text, duration);
-        }
-        s.show();
-        return s;
-    }
-
-    public Snackbar showSnackbarAbovePlayer(int text, int duration) {
-        return showSnackbarAbovePlayer(getResources().getText(text), duration);
-    }
-
     /**
      * Handles the deep link incoming via App Actions.
      * Performs an in-app search or opens the relevant feature of the app
@@ -771,8 +752,7 @@ public class MainActivity extends CastEnabledActivity {
                         loadFragment(SubscriptionFragment.TAG, null);
                         break;
                     default:
-                        showSnackbarAbovePlayer(getString(R.string.app_action_not_found, feature),
+                        EventBus.getDefault().post(new MessageEvent(getString(R.string.app_action_not_found, feature)));
-                                Snackbar.LENGTH_LONG);
                         return;
                 }
                 break;

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

@@ -1,7 +1,5 @@
 package de.danoeh.antennapod.activity;
 
-import static de.danoeh.antennapod.activity.MainActivity.EXTRA_FEED_ID;
-
 import android.content.Intent;
 import android.graphics.Bitmap;
 import android.os.Bundle;
@@ -26,6 +24,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.ui.appstartintent.MainActivityStarter;
 import de.danoeh.antennapod.ui.common.ThemeSwitcher;
 import de.danoeh.antennapod.storage.database.DBReader;
 import de.danoeh.antennapod.storage.database.NavDrawerData;
@@ -93,7 +92,7 @@ public class SelectSubscriptionActivity extends AppCompatActivity {
         Intent intent = new Intent(this, MainActivity.class);
         intent.setAction(Intent.ACTION_MAIN);
         intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
-        intent.putExtra(EXTRA_FEED_ID, feed.getId());
+        intent.putExtra(MainActivityStarter.EXTRA_FEED_ID, feed.getId());
         String id = "subscription-" + feed.getId();
         IconCompat icon;
 

app/src/main/java/de/danoeh/antennapod/ui/episodeslist/EpisodesListFragment.java

@@ -21,8 +21,8 @@ import androidx.recyclerview.widget.SimpleItemAnimator;
 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
 
 import com.google.android.material.appbar.MaterialToolbar;
-import com.google.android.material.snackbar.Snackbar;
 
+import de.danoeh.antennapod.event.MessageEvent;
 import de.danoeh.antennapod.ui.screen.SearchFragment;
 import de.danoeh.antennapod.net.download.serviceinterface.FeedUpdateManager;
 import de.danoeh.antennapod.ui.view.FloatingSelectMenu;
@@ -211,8 +211,7 @@ public abstract class EpisodesListFragment extends Fragment
         floatingSelectMenu.inflate(R.menu.episodes_apply_action_speeddial);
         floatingSelectMenu.setOnMenuItemClickListener(menuItem -> {
             if (listAdapter.getSelectedCount() == 0) {
-                ((MainActivity) getActivity()).showSnackbarAbovePlayer(R.string.no_items_selected_message,
+                EventBus.getDefault().post(new MessageEvent(getString(R.string.no_items_selected_message)));
-                        Snackbar.LENGTH_SHORT);
                 return false;
             }
             int confirmationString = 0;
@@ -241,8 +240,7 @@ public abstract class EpisodesListFragment extends Fragment
     }
 
     private void performMultiSelectAction(int actionItemId) {
-        EpisodeMultiSelectActionHandler handler =
+        EpisodeMultiSelectActionHandler handler = new EpisodeMultiSelectActionHandler(getActivity(), actionItemId);
-                new EpisodeMultiSelectActionHandler(((MainActivity) getActivity()), actionItemId);
         Completable.fromAction(
                 () -> {
                     handler.handleAction(listAdapter.getSelectedItems());

app/src/main/java/de/danoeh/antennapod/ui/episodeslist/FeedItemMenuHandler.java

@@ -11,13 +11,12 @@ import androidx.annotation.NonNull;
 import androidx.fragment.app.Fragment;
 
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
-import com.google.android.material.snackbar.Snackbar;
 
 import java.util.Arrays;
 import java.util.List;
 
 import de.danoeh.antennapod.R;
-import de.danoeh.antennapod.activity.MainActivity;
+import de.danoeh.antennapod.event.MessageEvent;
 import de.danoeh.antennapod.model.feed.Feed;
 import de.danoeh.antennapod.net.sync.serviceinterface.SynchronizationQueue;
 import de.danoeh.antennapod.storage.preferences.PlaybackPreferences;
@@ -34,6 +33,7 @@ import de.danoeh.antennapod.net.sync.serviceinterface.EpisodeAction;
 import de.danoeh.antennapod.storage.preferences.UserPreferences;
 import de.danoeh.antennapod.ui.appstartintent.MediaButtonStarter;
 import de.danoeh.antennapod.ui.view.LocalDeleteModal;
+import org.greenrobot.eventbus.EventBus;
 
 /**
  * Handles interactions with the FeedItemMenu.
@@ -301,19 +301,15 @@ public class FeedItemMenuHandler {
                 break;
         }
 
-        int duration = Snackbar.LENGTH_LONG;
-
         if (showSnackbar) {
-            ((MainActivity) fragment.getActivity()).showSnackbarAbovePlayer(
+            EventBus.getDefault().post(new MessageEvent(fragment.getString(playStateStringRes),
-                    playStateStringRes, duration)
+                    context -> {
-                    .setAction(fragment.getString(R.string.undo), v -> {
                         DBWriter.markItemPlayed(item.getPlayState(), item.getId());
                         // don't forget to cancel the thing that's going to remove the media
                         h.removeCallbacks(r);
-                    });
+                    }, fragment.getString(R.string.undo)));
         }
-
+        h.postDelayed(r, 2000);
-        h.postDelayed(r, (int) Math.ceil(duration * 1.05f));
     }
 
     public static void removeNewFlagWithUndo(@NonNull Fragment fragment, FeedItem item) {

app/src/main/java/de/danoeh/antennapod/ui/episodeslist/HorizontalItemViewHolder.java

@@ -1,5 +1,6 @@
 package de.danoeh.antennapod.ui.episodeslist;
 
+import android.app.Activity;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -9,7 +10,6 @@ import android.widget.TextView;
 import androidx.cardview.widget.CardView;
 import androidx.recyclerview.widget.RecyclerView;
 import de.danoeh.antennapod.R;
-import de.danoeh.antennapod.activity.MainActivity;
 import de.danoeh.antennapod.ui.CoverLoader;
 import de.danoeh.antennapod.actionbutton.ItemActionButton;
 import de.danoeh.antennapod.ui.common.DateFormatter;
@@ -33,10 +33,10 @@ public class HorizontalItemViewHolder extends RecyclerView.ViewHolder {
     private final CircularProgressBar circularProgressBar;
     private final View progressBarReplacementSpacer;
 
-    private final MainActivity activity;
+    private final Activity activity;
     private FeedItem item;
 
-    public HorizontalItemViewHolder(MainActivity activity, ViewGroup parent) {
+    public HorizontalItemViewHolder(Activity activity, ViewGroup parent) {
         super(LayoutInflater.from(activity).inflate(R.layout.horizontal_itemlist_item, parent, false));
         this.activity = activity;
 

app/src/main/java/de/danoeh/antennapod/ui/screen/AddFeedFragment.java

@@ -23,11 +23,11 @@ import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import androidx.core.widget.NestedScrollView;
 import androidx.documentfile.provider.DocumentFile;
 import androidx.fragment.app.Fragment;
-import com.google.android.material.snackbar.Snackbar;
 
 import de.danoeh.antennapod.R;
 import de.danoeh.antennapod.activity.MainActivity;
 import de.danoeh.antennapod.activity.OpmlImportActivity;
+import de.danoeh.antennapod.event.MessageEvent;
 import de.danoeh.antennapod.model.feed.Feed;
 import de.danoeh.antennapod.net.download.serviceinterface.FeedUpdateManager;
 import de.danoeh.antennapod.storage.database.FeedDatabaseWriter;
@@ -45,6 +45,7 @@ import de.danoeh.antennapod.ui.view.LiftOnScrollListener;
 import io.reactivex.Observable;
 import io.reactivex.android.schedulers.AndroidSchedulers;
 import io.reactivex.schedulers.Schedulers;
+import org.greenrobot.eventbus.EventBus;
 
 import java.util.Collections;
 
@@ -103,8 +104,7 @@ public class AddFeedFragment extends Fragment {
                 chooseOpmlImportPathLauncher.launch("*/*");
             } catch (ActivityNotFoundException e) {
                 e.printStackTrace();
-                ((MainActivity) getActivity())
+                EventBus.getDefault().post(new MessageEvent(getString(R.string.unable_to_start_system_file_manager)));
-                        .showSnackbarAbovePlayer(R.string.unable_to_start_system_file_manager, Snackbar.LENGTH_LONG);
             }
         });
 
@@ -113,8 +113,7 @@ public class AddFeedFragment extends Fragment {
                 addLocalFolderLauncher.launch(null);
             } catch (ActivityNotFoundException e) {
                 e.printStackTrace();
-                ((MainActivity) getActivity())
+                EventBus.getDefault().post(new MessageEvent(getString(R.string.unable_to_start_system_file_manager)));
-                        .showSnackbarAbovePlayer(R.string.unable_to_start_system_file_manager, Snackbar.LENGTH_LONG);
             }
         });
         viewBinding.searchButton.setOnClickListener(view -> performSearch());
@@ -188,8 +187,7 @@ public class AddFeedFragment extends Fragment {
                             ((MainActivity) getActivity()).loadChildFragment(fragment);
                         }, error -> {
                             Log.e(TAG, Log.getStackTraceString(error));
-                            ((MainActivity) getActivity())
+                            EventBus.getDefault().post(new MessageEvent(error.getLocalizedMessage()));
-                                    .showSnackbarAbovePlayer(error.getLocalizedMessage(), Snackbar.LENGTH_LONG);
                         });
     }
 

app/src/main/java/de/danoeh/antennapod/ui/screen/InboxFragment.java

@@ -8,12 +8,11 @@ import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.CheckBox;
-import android.widget.Toast;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import de.danoeh.antennapod.R;
-import de.danoeh.antennapod.activity.MainActivity;
+import de.danoeh.antennapod.event.MessageEvent;
 import de.danoeh.antennapod.storage.database.DBReader;
 import de.danoeh.antennapod.storage.database.DBWriter;
 import de.danoeh.antennapod.ui.screen.feed.ItemSortDialog;
@@ -106,7 +105,7 @@ public class InboxFragment extends EpisodesListFragment {
 
     private void removeAllFromInbox() {
         DBWriter.removeAllNewFlags();
-        ((MainActivity) getActivity()).showSnackbarAbovePlayer(R.string.removed_all_inbox_msg, Toast.LENGTH_SHORT);
+        EventBus.getDefault().post(new MessageEvent(getString(R.string.removed_all_inbox_msg)));
     }
 
     private void showRemoveAllDialog() {

app/src/main/java/de/danoeh/antennapod/ui/screen/SearchFragment.java

@@ -22,10 +22,10 @@ import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 
 import com.google.android.material.chip.Chip;
-import com.google.android.material.snackbar.Snackbar;
 
 import de.danoeh.antennapod.R;
 import de.danoeh.antennapod.activity.MainActivity;
+import de.danoeh.antennapod.event.MessageEvent;
 import de.danoeh.antennapod.ui.episodeslist.EpisodeItemListAdapter;
 import de.danoeh.antennapod.ui.screen.subscriptions.HorizontalFeedListAdapter;
 import de.danoeh.antennapod.ui.MenuItemUtils;
@@ -224,11 +224,10 @@ public class SearchFragment extends Fragment implements EpisodeItemListAdapter.O
         floatingSelectMenu.inflate(R.menu.episodes_apply_action_speeddial);
         floatingSelectMenu.setOnMenuItemClickListener(menuItem -> {
             if (adapter.getSelectedCount() == 0) {
-                ((MainActivity) getActivity())
+                EventBus.getDefault().post(new MessageEvent(getString(R.string.no_items_selected_message)));
-                        .showSnackbarAbovePlayer(R.string.no_items_selected_message, Snackbar.LENGTH_SHORT);
                 return false;
             }
-            new EpisodeMultiSelectActionHandler((MainActivity) getActivity(), menuItem.getItemId())
+            new EpisodeMultiSelectActionHandler(getActivity(), menuItem.getItemId())
                     .handleAction(adapter.getSelectedItems());
             adapter.endSelectMode();
             return true;

app/src/main/java/de/danoeh/antennapod/ui/screen/download/CompletedDownloadsFragment.java

@@ -12,13 +12,14 @@ import android.widget.ProgressBar;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
 
 import com.google.android.material.appbar.MaterialToolbar;
-import com.google.android.material.snackbar.Snackbar;
 import de.danoeh.antennapod.R;
 import de.danoeh.antennapod.activity.MainActivity;
 import de.danoeh.antennapod.event.FeedUpdateRunningEvent;
+import de.danoeh.antennapod.event.MessageEvent;
 import de.danoeh.antennapod.ui.common.ConfirmationDialog;
 import de.danoeh.antennapod.ui.episodeslist.EpisodeItemListAdapter;
 import de.danoeh.antennapod.actionbutton.DeleteActionButton;
@@ -107,7 +108,7 @@ public class CompletedDownloadsFragment extends Fragment
 
         recyclerView = root.findViewById(R.id.recyclerView);
         recyclerView.setRecycledViewPool(((MainActivity) getActivity()).getRecycledViewPool());
-        adapter = new CompletedDownloadsListAdapter((MainActivity) getActivity());
+        adapter = new CompletedDownloadsListAdapter(getActivity());
         adapter.setOnSelectModeListener(this);
         recyclerView.setAdapter(adapter);
         recyclerView.addOnScrollListener(new LiftOnScrollListener(root.findViewById(R.id.appbar)));
@@ -121,8 +122,7 @@ public class CompletedDownloadsFragment extends Fragment
         floatingSelectMenu.inflate(R.menu.episodes_apply_action_speeddial);
         floatingSelectMenu.setOnMenuItemClickListener(menuItem -> {
             if (adapter.getSelectedCount() == 0) {
-                ((MainActivity) getActivity()).showSnackbarAbovePlayer(R.string.no_items_selected_message,
+                EventBus.getDefault().post(new MessageEvent(getString(R.string.no_items_selected_message)));
-                        Snackbar.LENGTH_SHORT);
                 return false;
             }
             new EpisodeMultiSelectActionHandler(getActivity(), menuItem.getItemId())
@@ -363,7 +363,7 @@ public class CompletedDownloadsFragment extends Fragment
 
     private class CompletedDownloadsListAdapter extends EpisodeItemListAdapter {
 
-        public CompletedDownloadsListAdapter(MainActivity mainActivity) {
+        public CompletedDownloadsListAdapter(FragmentActivity mainActivity) {
             super(mainActivity);
         }
 

app/src/main/java/de/danoeh/antennapod/ui/screen/download/DownloadLogAdapter.java

@@ -6,16 +6,16 @@ import android.util.Log;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.BaseAdapter;
-import android.widget.Toast;
 import de.danoeh.antennapod.R;
-import de.danoeh.antennapod.activity.MainActivity;
 import de.danoeh.antennapod.actionbutton.DownloadActionButton;
+import de.danoeh.antennapod.event.MessageEvent;
 import de.danoeh.antennapod.net.download.serviceinterface.FeedUpdateManager;
 import de.danoeh.antennapod.storage.database.DBReader;
 import de.danoeh.antennapod.model.download.DownloadError;
 import de.danoeh.antennapod.model.download.DownloadResult;
 import de.danoeh.antennapod.model.feed.Feed;
 import de.danoeh.antennapod.model.feed.FeedMedia;
+import org.greenrobot.eventbus.EventBus;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -114,8 +114,8 @@ public class DownloadLogAdapter extends BaseAdapter {
                             return;
                         }
                         new DownloadActionButton(media.getItem()).onClick(context);
-                        ((MainActivity) context).showSnackbarAbovePlayer(
+                        EventBus.getDefault().post(new MessageEvent(
-                                R.string.status_downloading_label, Toast.LENGTH_SHORT);
+                                context.getResources().getString(R.string.status_downloading_label)));
                     });
                 }
             }

app/src/main/java/de/danoeh/antennapod/ui/screen/episode/ItemFragment.java

@@ -20,7 +20,6 @@ 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 com.google.android.material.snackbar.Snackbar;
 import com.skydoves.balloon.ArrowOrientation;
 import com.skydoves.balloon.ArrowOrientationRules;
 import com.skydoves.balloon.Balloon;
@@ -38,6 +37,7 @@ import de.danoeh.antennapod.actionbutton.PlayLocalActionButton;
 import de.danoeh.antennapod.actionbutton.StreamActionButton;
 import de.danoeh.antennapod.actionbutton.VisitWebsiteActionButton;
 import de.danoeh.antennapod.event.EpisodeDownloadEvent;
+import de.danoeh.antennapod.event.MessageEvent;
 import de.danoeh.antennapod.model.feed.Feed;
 import de.danoeh.antennapod.playback.service.PlaybackStatus;
 import de.danoeh.antennapod.event.FeedItemEvent;
@@ -151,8 +151,7 @@ public class ItemFragment extends Fragment {
                     && Objects.equals(item.getMedia().getIdentifier(), controller.getMedia().getIdentifier())) {
                 controller.seekTo(time);
             } else {
-                ((MainActivity) getActivity()).showSnackbarAbovePlayer(R.string.play_this_to_seek_position_message,
+                EventBus.getDefault().post(new MessageEvent(getString(R.string.play_this_to_seek_position_message)));
-                        Snackbar.LENGTH_LONG);
             }
         });
         registerForContextMenu(webvDescription);
@@ -218,8 +217,7 @@ public class ItemFragment extends Fragment {
             UserPreferences.setStreamOverDownload(offerStreaming);
             // Update all visible lists to reflect new streaming action button
             EventBus.getDefault().post(new UnreadItemsUpdateEvent());
-            ((MainActivity) getActivity()).showSnackbarAbovePlayer(
+            EventBus.getDefault().post(new MessageEvent(getString(R.string.on_demand_config_setting_changed)));
-                    R.string.on_demand_config_setting_changed, Snackbar.LENGTH_SHORT);
             balloon.dismiss();
         });
         negativeButton.setOnClickListener(v1 -> {

app/src/main/java/de/danoeh/antennapod/ui/screen/episode/ItemPagerFragment.java

@@ -1,6 +1,5 @@
 package de.danoeh.antennapod.ui.screen.episode;
 
-import android.content.Intent;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.MenuItem;
@@ -16,13 +15,13 @@ import androidx.viewpager2.widget.ViewPager2;
 
 import de.danoeh.antennapod.event.UnreadItemsUpdateEvent;
 import de.danoeh.antennapod.model.feed.Feed;
+import de.danoeh.antennapod.ui.appstartintent.MainActivityStarter;
 import de.danoeh.antennapod.ui.appstartintent.OnlineFeedviewActivityStarter;
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
 import org.greenrobot.eventbus.ThreadMode;
 
 import de.danoeh.antennapod.R;
-import de.danoeh.antennapod.activity.MainActivity;
 import de.danoeh.antennapod.event.FeedItemEvent;
 import de.danoeh.antennapod.model.feed.FeedItem;
 import de.danoeh.antennapod.storage.database.DBReader;
@@ -183,8 +182,7 @@ public class ItemPagerFragment extends Fragment implements MaterialToolbar.OnMen
             return;
         }
         if (item.getFeed().getState() == Feed.STATE_SUBSCRIBED) {
-            Intent intent = MainActivity.getIntentToOpenFeed(getContext(), item.getFeedId());
+            new MainActivityStarter(getContext()).withOpenFeed(item.getFeedId()).withClearTop().start();
-            startActivity(intent);
         } else {
             startActivity(new OnlineFeedviewActivityStarter(getContext(), item.getFeed().getDownloadUrl()).getIntent());
         }

app/src/main/java/de/danoeh/antennapod/ui/screen/feed/FeedInfoFragment.java

@@ -15,7 +15,6 @@ import android.view.LayoutInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.Toast;
 import androidx.activity.result.ActivityResultLauncher;
 import androidx.activity.result.contract.ActivityResultContracts;
 import androidx.annotation.NonNull;
@@ -26,10 +25,10 @@ import com.bumptech.glide.Glide;
 import com.bumptech.glide.request.RequestOptions;
 import com.google.android.material.appbar.MaterialToolbar;
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
-import com.google.android.material.snackbar.Snackbar;
 import de.danoeh.antennapod.R;
 import de.danoeh.antennapod.activity.MainActivity;
 import de.danoeh.antennapod.databinding.FeedinfoBinding;
+import de.danoeh.antennapod.event.MessageEvent;
 import de.danoeh.antennapod.storage.database.DBWriter;
 import de.danoeh.antennapod.ui.TransitionEffect;
 import de.danoeh.antennapod.storage.database.DBReader;
@@ -52,6 +51,7 @@ import io.reactivex.android.schedulers.AndroidSchedulers;
 import io.reactivex.disposables.Disposable;
 import io.reactivex.schedulers.Schedulers;
 import org.apache.commons.lang3.StringUtils;
+import org.greenrobot.eventbus.EventBus;
 
 import java.util.ArrayList;
 import java.util.Iterator;
@@ -87,11 +87,8 @@ public class FeedInfoFragment extends Fragment implements MaterialToolbar.OnMenu
                 android.content.ClipboardManager cm = (android.content.ClipboardManager) getContext()
                         .getSystemService(Context.CLIPBOARD_SERVICE);
                 cm.setPrimaryClip(clipData);
-                if (Build.VERSION.SDK_INT <= 32 && getActivity() instanceof MainActivity) {
+                if (Build.VERSION.SDK_INT <= 32) {
-                    ((MainActivity) getActivity()).showSnackbarAbovePlayer(R.string.copied_to_clipboard,
+                    EventBus.getDefault().post(new MessageEvent(getString(R.string.copied_to_clipboard)));
-                            Snackbar.LENGTH_SHORT);
-                } else if (Build.VERSION.SDK_INT <= 32) {
-                    Snackbar.make(getView(), R.string.copied_to_clipboard, Snackbar.LENGTH_SHORT).show();
                 }
             }
         }
@@ -285,8 +282,7 @@ public class FeedInfoFragment extends Fragment implements MaterialToolbar.OnMenu
     @Override
     public boolean onMenuItemClick(MenuItem item) {
         if (feed == null) {
-            ((MainActivity) getActivity()).showSnackbarAbovePlayer(
+            EventBus.getDefault().post(new MessageEvent(getString(R.string.please_wait_for_data)));
-                    R.string.please_wait_for_data, Toast.LENGTH_LONG);
             return false;
         }
         if (item.getItemId() == R.id.visit_website_item) {
@@ -346,10 +342,8 @@ public class FeedInfoFragment extends Fragment implements MaterialToolbar.OnMenu
                 .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(
-                        () -> ((MainActivity) getActivity())
+                        () -> EventBus.getDefault().post(new MessageEvent(getString(android.R.string.ok))),
-                                .showSnackbarAbovePlayer(android.R.string.ok, Snackbar.LENGTH_SHORT),
+                        error -> EventBus.getDefault().post(new MessageEvent(error.getLocalizedMessage())));
-                        error -> ((MainActivity) getActivity())
-                                .showSnackbarAbovePlayer(error.getLocalizedMessage(), Snackbar.LENGTH_LONG));
     }
 
     private static class AddLocalFolder extends ActivityResultContracts.OpenDocumentTree {

app/src/main/java/de/danoeh/antennapod/ui/screen/feed/FeedItemlistFragment.java

@@ -11,7 +11,6 @@ import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.AdapterView;
-import android.widget.Toast;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.core.util.Pair;
@@ -21,7 +20,6 @@ import androidx.recyclerview.widget.RecyclerView;
 import com.bumptech.glide.Glide;
 import com.bumptech.glide.request.RequestOptions;
 import com.google.android.material.appbar.MaterialToolbar;
-import com.google.android.material.snackbar.Snackbar;
 import de.danoeh.antennapod.R;
 import de.danoeh.antennapod.activity.MainActivity;
 import de.danoeh.antennapod.databinding.FeedItemListFragmentBinding;
@@ -31,6 +29,7 @@ import de.danoeh.antennapod.event.FeedEvent;
 import de.danoeh.antennapod.event.FeedItemEvent;
 import de.danoeh.antennapod.event.FeedListUpdateEvent;
 import de.danoeh.antennapod.event.FeedUpdateRunningEvent;
+import de.danoeh.antennapod.event.MessageEvent;
 import de.danoeh.antennapod.event.PlayerStatusEvent;
 import de.danoeh.antennapod.event.QueueEvent;
 import de.danoeh.antennapod.event.UnreadItemsUpdateEvent;
@@ -198,8 +197,7 @@ public class FeedItemlistFragment extends Fragment implements AdapterView.OnItem
         viewBinding.floatingSelectMenu.inflate(R.menu.episodes_apply_action_speeddial);
         viewBinding.floatingSelectMenu.setOnMenuItemClickListener(menuItem -> {
             if (adapter.getSelectedCount() == 0) {
-                ((MainActivity) getActivity()).showSnackbarAbovePlayer(R.string.no_items_selected_message,
+                EventBus.getDefault().post(new MessageEvent(getString(R.string.no_items_selected_message)));
-                        Snackbar.LENGTH_SHORT);
                 return false;
             }
             EpisodeMultiSelectActionHandler handler
@@ -333,8 +331,8 @@ public class FeedItemlistFragment extends Fragment implements AdapterView.OnItem
             return true;
         }
 
-        Runnable showRemovedAllSnackbar = () -> ((MainActivity) getActivity())
+        Runnable showRemovedAllSnackbar = () -> EventBus.getDefault().post(
-                .showSnackbarAbovePlayer(R.string.removed_all_inbox_msg, Toast.LENGTH_SHORT);
+                new MessageEvent(getString(R.string.removed_all_inbox_msg)));
         return FeedMenuHandler.onMenuItemClicked(this, item.getItemId(), feed, showRemovedAllSnackbar);
     }
 

app/src/main/java/de/danoeh/antennapod/ui/screen/onlinefeedview/OnlineFeedViewActivity.java

@@ -19,9 +19,11 @@ import androidx.annotation.Nullable;
 import androidx.annotation.UiThread;
 import androidx.appcompat.app.AppCompatActivity;
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
+import com.google.android.material.snackbar.Snackbar;
 import de.danoeh.antennapod.R;
 import de.danoeh.antennapod.databinding.EditTextDialogBinding;
 import de.danoeh.antennapod.databinding.OnlinefeedviewActivityBinding;
+import de.danoeh.antennapod.event.MessageEvent;
 import de.danoeh.antennapod.model.download.DownloadError;
 import de.danoeh.antennapod.model.download.DownloadRequest;
 import de.danoeh.antennapod.model.download.DownloadResult;
@@ -51,6 +53,9 @@ import io.reactivex.Observable;
 import io.reactivex.android.schedulers.AndroidSchedulers;
 import io.reactivex.disposables.Disposable;
 import io.reactivex.schedulers.Schedulers;
+import org.greenrobot.eventbus.EventBus;
+import org.greenrobot.eventbus.Subscribe;
+import org.greenrobot.eventbus.ThreadMode;
 
 import java.io.File;
 import java.io.IOException;
@@ -128,6 +133,7 @@ public class OnlineFeedViewActivity extends AppCompatActivity {
     protected void onStart() {
         super.onStart();
         isPaused = false;
+        EventBus.getDefault().register(this);
     }
 
     @Override
@@ -140,6 +146,7 @@ public class OnlineFeedViewActivity extends AppCompatActivity {
         if (dialog != null && dialog.isShowing()) {
             dialog.dismiss();
         }
+        EventBus.getDefault().unregister(this);
     }
 
     @Override
@@ -468,6 +475,16 @@ public class OnlineFeedViewActivity extends AppCompatActivity {
         return true;
     }
 
+    @Subscribe(threadMode = ThreadMode.MAIN)
+    public void onEventMainThread(MessageEvent event) {
+        Log.d(TAG, "onEvent(" + event + ")");
+        Snackbar snackbar = Snackbar.make(findViewById(android.R.id.content), event.message, Snackbar.LENGTH_LONG);
+        snackbar.show();
+        if (event.action != null) {
+            snackbar.setAction(event.actionText, v -> event.action.accept(this));
+        }
+    }
+
     private class FeedViewAuthenticationDialog extends AuthenticationDialog {
 
         private final String feedUrl;

app/src/main/java/de/danoeh/antennapod/ui/screen/playback/audio/AudioPlayerFragment.java

@@ -1,6 +1,5 @@
 package de.danoeh.antennapod.ui.screen.playback.audio;
 
-import android.content.Intent;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.KeyEvent;
@@ -26,6 +25,7 @@ import com.google.android.material.bottomsheet.BottomSheetBehavior;
 
 import de.danoeh.antennapod.model.feed.Feed;
 import de.danoeh.antennapod.playback.service.PlaybackController;
+import de.danoeh.antennapod.ui.appstartintent.MainActivityStarter;
 import de.danoeh.antennapod.ui.appstartintent.MediaButtonStarter;
 import de.danoeh.antennapod.ui.appstartintent.OnlineFeedviewActivityStarter;
 import de.danoeh.antennapod.ui.chapters.ChapterUtils;
@@ -515,8 +515,7 @@ public class AudioPlayerFragment extends Fragment implements
             return;
         }
         if (feed.getState() == Feed.STATE_SUBSCRIBED) {
-            Intent intent = MainActivity.getIntentToOpenFeed(getContext(), feed.getId());
+            new MainActivityStarter(getContext()).withOpenFeed(feed.getId()).withClearTop().start();
-            startActivity(intent);
         } else {
             startActivity(new OnlineFeedviewActivityStarter(getContext(), feed.getDownloadUrl()).getIntent());
         }

app/src/main/java/de/danoeh/antennapod/ui/screen/playback/audio/CoverFragment.java

@@ -6,7 +6,6 @@ import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
 import android.content.ClipData;
 import android.content.ClipboardManager;
-import android.content.Intent;
 import android.content.res.Configuration;
 import android.graphics.ColorFilter;
 import android.graphics.drawable.Drawable;
@@ -29,10 +28,10 @@ import com.bumptech.glide.RequestBuilder;
 import com.bumptech.glide.load.resource.bitmap.FitCenter;
 import com.bumptech.glide.load.resource.bitmap.RoundedCorners;
 import com.bumptech.glide.request.RequestOptions;
-import com.google.android.material.snackbar.Snackbar;
 import de.danoeh.antennapod.R;
-import de.danoeh.antennapod.activity.MainActivity;
+import de.danoeh.antennapod.event.MessageEvent;
 import de.danoeh.antennapod.model.feed.Feed;
+import de.danoeh.antennapod.ui.appstartintent.MainActivityStarter;
 import de.danoeh.antennapod.ui.appstartintent.OnlineFeedviewActivityStarter;
 import de.danoeh.antennapod.ui.chapters.ChapterUtils;
 import de.danoeh.antennapod.ui.screen.chapter.ChaptersFragment;
@@ -169,8 +168,7 @@ public class CoverFragment extends Fragment {
             return;
         }
         if (feed.getState() == Feed.STATE_SUBSCRIBED) {
-            Intent intent = MainActivity.getIntentToOpenFeed(getContext(), feed.getId());
+            new MainActivityStarter(getContext()).withOpenFeed(feed.getId()).withClearTop().start();
-            startActivity(intent);
         } else {
             startActivity(new OnlineFeedviewActivityStarter(getContext(), feed.getDownloadUrl()).getIntent());
         }
@@ -349,8 +347,7 @@ public class CoverFragment extends Fragment {
             clipboardManager.setPrimaryClip(ClipData.newPlainText("AntennaPod", text));
         }
         if (Build.VERSION.SDK_INT <= 32) {
-            ((MainActivity) requireActivity()).showSnackbarAbovePlayer(
+            EventBus.getDefault().post(new MessageEvent(getString(R.string.copied_to_clipboard)));
-                    getResources().getString(R.string.copied_to_clipboard), Snackbar.LENGTH_SHORT);
         }
         return true;
     }

app/src/main/java/de/danoeh/antennapod/ui/screen/playback/video/VideoplayerActivity.java

@@ -634,8 +634,7 @@ public class VideoplayerActivity extends CastEnabledActivity implements SeekBar.
             PlaybackControlsDialog dialog = PlaybackControlsDialog.newInstance();
             dialog.show(getSupportFragmentManager(), "playback_controls");
         } else if (item.getItemId() == R.id.open_feed_item && feedItem != null) {
-            Intent intent = MainActivity.getIntentToOpenFeed(this, feedItem.getFeedId());
+            new MainActivityStarter(this).withOpenFeed(feedItem.getFeedId()).withClearTop().start();
-            startActivity(intent);
         } else if (item.getItemId() == R.id.visit_website_item) {
             IntentUtils.openInBrowser(VideoplayerActivity.this, getWebsiteLinkWithFallback(media));
         } else if (item.getItemId() == R.id.share_item && feedItem != null) {

app/src/main/java/de/danoeh/antennapod/ui/screen/queue/QueueFragment.java

@@ -27,8 +27,8 @@ import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
 
 import com.google.android.material.appbar.MaterialToolbar;
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
-import com.google.android.material.snackbar.Snackbar;
 
+import de.danoeh.antennapod.event.MessageEvent;
 import de.danoeh.antennapod.event.playback.SpeedChangedEvent;
 import de.danoeh.antennapod.ui.screen.InboxFragment;
 import de.danoeh.antennapod.ui.screen.SearchFragment;
@@ -351,11 +351,11 @@ public class QueueFragment extends Fragment implements MaterialToolbar.OnMenuIte
         if (recyclerAdapter != null) {
             recyclerAdapter.updateDragDropEnabled();
         }
-        if (queue.size() == 0) {
+        if (queue.isEmpty()) {
             if (locked) {
-                ((MainActivity) getActivity()).showSnackbarAbovePlayer(R.string.queue_locked, Snackbar.LENGTH_SHORT);
+                EventBus.getDefault().post(new MessageEvent(getString(R.string.queue_locked)));
             } else {
-                ((MainActivity) getActivity()).showSnackbarAbovePlayer(R.string.queue_unlocked, Snackbar.LENGTH_SHORT);
+                EventBus.getDefault().post(new MessageEvent(getString(R.string.queue_unlocked)));
             }
         }
     }
@@ -477,8 +477,7 @@ public class QueueFragment extends Fragment implements MaterialToolbar.OnMenuIte
         floatingSelectMenu.inflate(R.menu.episodes_apply_action_speeddial);
         floatingSelectMenu.setOnMenuItemClickListener(menuItem -> {
             if (recyclerAdapter.getSelectedCount() == 0) {
-                ((MainActivity) getActivity()).showSnackbarAbovePlayer(R.string.no_items_selected_message,
+                EventBus.getDefault().post(new MessageEvent(getString(R.string.no_items_selected_message)));
-                        Snackbar.LENGTH_SHORT);
                 return false;
             }
             new EpisodeMultiSelectActionHandler(getActivity(), menuItem.getItemId())

app/src/main/java/de/danoeh/antennapod/ui/screen/queue/QueueRecyclerAdapter.java

@@ -7,8 +7,8 @@ import android.view.MenuInflater;
 import android.view.MotionEvent;
 import android.view.View;
 
+import androidx.fragment.app.FragmentActivity;
 import de.danoeh.antennapod.R;
-import de.danoeh.antennapod.activity.MainActivity;
 import de.danoeh.antennapod.ui.episodeslist.EpisodeItemListAdapter;
 import de.danoeh.antennapod.storage.preferences.UserPreferences;
 import de.danoeh.antennapod.ui.swipeactions.SwipeActions;
@@ -24,7 +24,7 @@ public class QueueRecyclerAdapter extends EpisodeItemListAdapter {
     private boolean dragDropEnabled;
 
 
-    public QueueRecyclerAdapter(MainActivity mainActivity, SwipeActions swipeActions) {
+    public QueueRecyclerAdapter(FragmentActivity mainActivity, SwipeActions swipeActions) {
         super(mainActivity);
         this.swipeActions = swipeActions;
         dragDropEnabled = ! (UserPreferences.isQueueKeepSorted() || UserPreferences.isQueueLocked());

app/src/main/java/de/danoeh/antennapod/ui/screen/subscriptions/FeedMultiSelectActionHandler.java

@@ -3,17 +3,16 @@ package de.danoeh.antennapod.ui.screen.subscriptions;
 import android.util.Log;
 
 import androidx.annotation.PluralsRes;
+import androidx.fragment.app.FragmentActivity;
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import androidx.core.util.Consumer;
 
-import com.google.android.material.snackbar.Snackbar;
-
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Locale;
 
 import de.danoeh.antennapod.R;
-import de.danoeh.antennapod.activity.MainActivity;
+import de.danoeh.antennapod.event.MessageEvent;
 import de.danoeh.antennapod.storage.database.DBWriter;
 import de.danoeh.antennapod.databinding.PlaybackSpeedFeedSettingDialogBinding;
 import de.danoeh.antennapod.ui.screen.feed.RemoveFeedDialog;
@@ -22,13 +21,14 @@ import de.danoeh.antennapod.model.feed.Feed;
 import de.danoeh.antennapod.model.feed.FeedPreferences;
 import de.danoeh.antennapod.ui.screen.preferences.PreferenceListDialog;
 import de.danoeh.antennapod.ui.screen.preferences.PreferenceSwitchDialog;
+import org.greenrobot.eventbus.EventBus;
 
 public class FeedMultiSelectActionHandler {
     private static final String TAG = "FeedSelectHandler";
-    private final MainActivity activity;
+    private final FragmentActivity activity;
     private final List<Feed> selectedItems;
 
-    public FeedMultiSelectActionHandler(MainActivity activity, List<Feed> selectedItems) {
+    public FeedMultiSelectActionHandler(FragmentActivity activity, List<Feed> selectedItems) {
         this.activity = activity;
         this.selectedItems = selectedItems;
     }
@@ -121,8 +121,8 @@ public class FeedMultiSelectActionHandler {
     }
 
     private void showMessage(@PluralsRes int msgId, int numItems) {
-        activity.showSnackbarAbovePlayer(activity.getResources()
+        EventBus.getDefault().post(new MessageEvent(activity.getResources()
-                .getQuantityString(msgId, numItems, numItems), Snackbar.LENGTH_LONG);
+                .getQuantityString(msgId, numItems, numItems)));
     }
 
     private void saveFeedPreferences(Consumer<FeedPreferences> preferencesConsumer) {

app/src/main/java/de/danoeh/antennapod/ui/screen/subscriptions/SubscriptionFragment.java

@@ -178,7 +178,7 @@ public class SubscriptionFragment extends Fragment
         floatingSelectMenu = root.findViewById(R.id.floatingSelectMenu);
         floatingSelectMenu.inflate(R.menu.nav_feed_action_speeddial);
         floatingSelectMenu.setOnMenuItemClickListener(menuItem -> {
-            new FeedMultiSelectActionHandler((MainActivity) getActivity(), subscriptionAdapter.getSelectedItems())
+            new FeedMultiSelectActionHandler(getActivity(), subscriptionAdapter.getSelectedItems())
                     .handleAction(menuItem.getItemId());
             return true;
         });

app/src/main/java/de/danoeh/antennapod/ui/screen/subscriptions/SubscriptionViewHolder.java

@@ -1,5 +1,6 @@
 package de.danoeh.antennapod.ui.screen.subscriptions;
 
+import android.app.Activity;
 import android.graphics.drawable.Drawable;
 import android.view.View;
 import android.widget.CheckBox;
@@ -11,7 +12,6 @@ import androidx.appcompat.content.res.AppCompatResources;
 import androidx.cardview.widget.CardView;
 import androidx.recyclerview.widget.RecyclerView;
 import de.danoeh.antennapod.R;
-import de.danoeh.antennapod.activity.MainActivity;
 import de.danoeh.antennapod.model.feed.Feed;
 import de.danoeh.antennapod.storage.database.NavDrawerData;
 import de.danoeh.antennapod.storage.preferences.UserPreferences;
@@ -30,9 +30,9 @@ public class SubscriptionViewHolder extends RecyclerView.ViewHolder {
     public final CheckBox selectCheckbox;
     public final CardView card;
     public final View errorIcon;
-    public final WeakReference<MainActivity> mainActivityRef;
+    public final WeakReference<Activity> mainActivityRef;
 
-    public SubscriptionViewHolder(@NonNull View itemView, MainActivity mainActivity) {
+    public SubscriptionViewHolder(@NonNull View itemView, Activity mainActivity) {
         super(itemView);
         title = itemView.findViewById(R.id.titleLabel);
         coverImage = itemView.findViewById(R.id.coverImage);

app/src/main/java/de/danoeh/antennapod/ui/swipeactions/RemoveFromHistorySwipeAction.java

@@ -3,16 +3,14 @@ package de.danoeh.antennapod.ui.swipeactions;
 import android.content.Context;
 
 import androidx.fragment.app.Fragment;
-
-import com.google.android.material.snackbar.Snackbar;
-
 import java.util.Date;
 
 import de.danoeh.antennapod.R;
-import de.danoeh.antennapod.activity.MainActivity;
+import de.danoeh.antennapod.event.MessageEvent;
 import de.danoeh.antennapod.storage.database.DBWriter;
 import de.danoeh.antennapod.model.feed.FeedItem;
 import de.danoeh.antennapod.model.feed.FeedItemFilter;
+import org.greenrobot.eventbus.EventBus;
 
 public class RemoveFromHistorySwipeAction implements SwipeAction {
 
@@ -40,15 +38,11 @@ public class RemoveFromHistorySwipeAction implements SwipeAction {
 
     @Override
     public void performAction(FeedItem item, Fragment fragment, FeedItemFilter filter) {
-
         Date playbackCompletionDate = item.getMedia().getPlaybackCompletionDate();
-
         DBWriter.deleteFromPlaybackHistory(item);
-
+        EventBus.getDefault().post(new MessageEvent(fragment.getString(R.string.removed_history_label),
-        ((MainActivity) fragment.requireActivity())
+                context -> DBWriter.addItemToPlaybackHistory(item.getMedia(), playbackCompletionDate),
-                .showSnackbarAbovePlayer(R.string.removed_history_label, Snackbar.LENGTH_LONG)
+                fragment.getString(R.string.undo)));
-                .setAction(fragment.getString(R.string.undo),
-                        v -> DBWriter.addItemToPlaybackHistory(item.getMedia(), playbackCompletionDate));
     }
 
     @Override

app/src/main/java/de/danoeh/antennapod/ui/swipeactions/RemoveFromQueueSwipeAction.java

@@ -1,17 +1,14 @@
 package de.danoeh.antennapod.ui.swipeactions;
 
 import android.content.Context;
-
 import androidx.fragment.app.Fragment;
-
-import com.google.android.material.snackbar.Snackbar;
-
 import de.danoeh.antennapod.R;
-import de.danoeh.antennapod.activity.MainActivity;
+import de.danoeh.antennapod.event.MessageEvent;
 import de.danoeh.antennapod.storage.database.DBReader;
 import de.danoeh.antennapod.storage.database.DBWriter;
 import de.danoeh.antennapod.model.feed.FeedItem;
 import de.danoeh.antennapod.model.feed.FeedItemFilter;
+import org.greenrobot.eventbus.EventBus;
 
 public class RemoveFromQueueSwipeAction implements SwipeAction {
 
@@ -38,15 +35,12 @@ public class RemoveFromQueueSwipeAction implements SwipeAction {
     @Override
     public void performAction(FeedItem item, Fragment fragment, FeedItemFilter filter) {
         int position = DBReader.getQueueIDList().indexOf(item.getId());
-
         DBWriter.removeQueueItem(fragment.requireActivity(), true, item);
-
         if (willRemove(filter, item)) {
-            ((MainActivity) fragment.requireActivity()).showSnackbarAbovePlayer(
+            EventBus.getDefault().post(new MessageEvent(
                     fragment.getResources().getQuantityString(R.plurals.removed_from_queue_message, 1, 1),
-                    Snackbar.LENGTH_LONG)
+                    context -> DBWriter.addQueueItemAt(fragment.requireActivity(), item.getId(), position),
-                    .setAction(fragment.getString(R.string.undo), v ->
+                    fragment.getString(R.string.undo)));
-                            DBWriter.addQueueItemAt(fragment.requireActivity(), item.getId(), position));
         }
     }
 

app/src/main/java/de/danoeh/antennapod/ui/view/ShownotesWebView.java

@@ -23,13 +23,14 @@ import androidx.core.util.Consumer;
 import com.google.android.material.snackbar.Snackbar;
 
 import de.danoeh.antennapod.R;
-import de.danoeh.antennapod.activity.MainActivity;
+import de.danoeh.antennapod.event.MessageEvent;
 import de.danoeh.antennapod.ui.MenuItemUtils;
 import de.danoeh.antennapod.ui.common.Converter;
 import de.danoeh.antennapod.ui.common.IntentUtils;
 import de.danoeh.antennapod.net.common.NetworkUtils;
 import de.danoeh.antennapod.ui.share.ShareUtils;
 import de.danoeh.antennapod.ui.cleaner.ShownotesCleaner;
+import org.greenrobot.eventbus.EventBus;
 
 public class ShownotesWebView extends WebView implements View.OnLongClickListener {
     private static final String TAG = "ShownotesWebView";
@@ -104,10 +105,9 @@ public class ShownotesWebView extends WebView implements View.OnLongClickListene
             if (clipboardManager != null) {
                 clipboardManager.setPrimaryClip(ClipData.newPlainText("AntennaPod", r.getExtra()));
             }
-            if (Build.VERSION.SDK_INT <= 32 && this.getContext() instanceof MainActivity) {
+            if (Build.VERSION.SDK_INT <= 32) {
-                ((MainActivity) this.getContext()).showSnackbarAbovePlayer(
+                EventBus.getDefault().post(new MessageEvent(
-                        getResources().getString(R.string.copied_to_clipboard),
+                        getContext().getResources().getString(R.string.copied_to_clipboard)));
-                        Snackbar.LENGTH_SHORT);
             }
             return true;
         }

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

@@ -76,6 +76,11 @@ public class MainActivityStarter {
         return this;
     }
 
+    public MainActivityStarter withClearTop() {
+        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
+        return this;
+    }
+
     public MainActivityStarter withFragmentArgs(String name, boolean value) {
         if (fragmentArgs == null) {
             fragmentArgs = new Bundle();