Fixed flashing refresh button

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

@@ -62,7 +62,7 @@ public class AllEpisodesFragment extends EpisodesListFragment {
     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
         super.onCreateOptionsMenu(menu, inflater);
         menu.findItem(R.id.filter_items).setVisible(true);
-        menu.findItem(R.id.mark_all_read_item).setVisible(!episodes.isEmpty());
+        menu.findItem(R.id.mark_all_read_item).setVisible(true);
     }
 
     @Override

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

@@ -4,6 +4,7 @@ import android.content.Context;
 import android.content.SharedPreferences;
 import android.content.res.Resources;
 import android.os.Bundle;
+import androidx.annotation.NonNull;
 import com.google.android.material.tabs.TabLayout;
 import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentManager;
@@ -47,7 +48,7 @@ public class EpisodesFragment extends Fragment {
 
         View rootView = inflater.inflate(R.layout.pager_fragment, container, false);
         viewPager = rootView.findViewById(R.id.viewpager);
-        viewPager.setAdapter(new EpisodesPagerAdapter(getChildFragmentManager(), getResources()));
+        viewPager.setAdapter(new EpisodesPagerAdapter());
 
         // Give the TabLayout the ViewPager
         tabLayout = rootView.findViewById(R.id.sliding_tabs);
@@ -76,23 +77,23 @@ public class EpisodesFragment extends Fragment {
         viewPager.setCurrentItem(lastPosition);
     }
 
-    public static class EpisodesPagerAdapter extends FragmentPagerAdapter {
+    public class EpisodesPagerAdapter extends FragmentPagerAdapter {
 
-        private final Resources resources;
-        private final EpisodesListFragment[] fragments = {
-                new NewEpisodesFragment(),
-                new AllEpisodesFragment(),
-                new FavoriteEpisodesFragment()
-        };
-
-        public EpisodesPagerAdapter(FragmentManager fm, Resources resources) {
-            super(fm);
-            this.resources = resources;
+        public EpisodesPagerAdapter() {
+            super(getChildFragmentManager());
         }
 
         @Override
+        @NonNull
         public Fragment getItem(int position) {
-            return fragments[position];
+            switch (position) {
+                case 0:
+                    return new NewEpisodesFragment();
+                case 1:
+                    return new AllEpisodesFragment();
+                default:
+                    return new FavoriteEpisodesFragment();
+            }
         }
 
         @Override
@@ -104,23 +105,14 @@ public class EpisodesFragment extends Fragment {
         public CharSequence getPageTitle(int position) {
             switch (position) {
                 case POS_ALL_EPISODES:
-                    return resources.getString(R.string.all_episodes_short_label);
+                    return getString(R.string.all_episodes_short_label);
                 case POS_NEW_EPISODES:
-                    return resources.getString(R.string.new_episodes_label);
+                    return getString(R.string.new_episodes_label);
                 case POS_FAV_EPISODES:
-                    return resources.getString(R.string.favorite_episodes_label);
+                    return getString(R.string.favorite_episodes_label);
                 default:
                     return super.getPageTitle(position);
             }
         }
-
-        @Override
-        public void setPrimaryItem(ViewGroup container, int position, Object object) {
-            super.setPrimaryItem(container, position, object);
-            for (int i = 0; i < TOTAL_COUNT; i++) {
-                // Invalidating the OptionsMenu is only allowed for the currently active fragment
-                fragments[i].isMenuInvalidationAllowed = (i == position);
-            }
-        }
     }
 }

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

@@ -81,9 +81,8 @@ public abstract class EpisodesListFragment extends Fragment {
     @NonNull
     List<FeedItem> episodes = new ArrayList<>();
 
-    private boolean isUpdatingFeeds;
-    boolean isMenuInvalidationAllowed = false;
-
+    private volatile boolean isUpdatingFeeds;
+    private boolean isMenuVisible = true;
     protected Disposable disposable;
     private LinearLayoutManager layoutManager;
     protected TextView txtvInformation;
@@ -156,6 +155,12 @@ public abstract class EpisodesListFragment extends Fragment {
     private final MenuItemUtils.UpdateRefreshMenuItemChecker updateRefreshMenuItemChecker =
             () -> DownloadService.isRunning && DownloadRequester.getInstance().isDownloadingFeeds();
 
+    @Override
+    public void setMenuVisibility(final boolean visible) {
+        super.setMenuVisibility(visible);
+        isMenuVisible = visible;
+    }
+
     @Override
     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
         if (!isAdded()) {
@@ -346,7 +351,9 @@ public abstract class EpisodesListFragment extends Fragment {
         }
 
         restoreScrollPosition();
-        requireActivity().invalidateOptionsMenu();
+        if (isMenuVisible && isUpdatingFeeds != updateRefreshMenuItemChecker.isRefreshing()) {
+            requireActivity().invalidateOptionsMenu();
+        }
     }
 
     /**
@@ -400,8 +407,7 @@ public abstract class EpisodesListFragment extends Fragment {
     public void onEventMainThread(DownloadEvent event) {
         Log.d(TAG, "onEventMainThread() called with: " + "event = [" + event + "]");
         DownloaderUpdate update = event.update;
-        List<Downloader> downloaderList = update.downloaders;
-        if (isMenuInvalidationAllowed && event.hasChangedFeedUpdateStatus(isUpdatingFeeds)) {
+        if (isMenuVisible && event.hasChangedFeedUpdateStatus(isUpdatingFeeds)) {
             requireActivity().invalidateOptionsMenu();
         }
         if (update.mediaIds.length > 0) {
@@ -416,7 +422,7 @@ public abstract class EpisodesListFragment extends Fragment {
 
     private void updateUi() {
         loadItems();
-        if (isUpdatingFeeds != updateRefreshMenuItemChecker.isRefreshing()) {
+        if (isMenuVisible && isUpdatingFeeds != updateRefreshMenuItemChecker.isRefreshing()) {
             requireActivity().invalidateOptionsMenu();
         }
     }

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

@@ -40,7 +40,7 @@ public class NewEpisodesFragment extends EpisodesListFragment {
     @Override
     public void onPrepareOptionsMenu(Menu menu) {
         super.onPrepareOptionsMenu(menu);
-        menu.findItem(R.id.remove_all_new_flags_item).setVisible(!episodes.isEmpty());
+        menu.findItem(R.id.remove_all_new_flags_item).setVisible(true);
     }
 
     @NonNull