Automatically update the data list in every view when the media store has changed.

app/src/main/java/com/kabouzeid/gramophone/adapter/song/ArtistSongAdapter.java

@@ -44,18 +44,23 @@ public class ArtistSongAdapter extends ArrayAdapter<Song> implements MaterialCab
     @NonNull
     private final AppCompatActivity activity;
 
-    public ArtistSongAdapter(@NonNull AppCompatActivity activity, @NonNull ArrayList<Song> songs, @Nullable CabHolder cabHolder) {
+    public ArtistSongAdapter(@NonNull AppCompatActivity activity, @NonNull ArrayList<Song> dataSet, @Nullable CabHolder cabHolder) {
-        super(activity, R.layout.item_list, songs);
+        super(activity, R.layout.item_list, dataSet);
         this.activity = activity;
         this.cabHolder = cabHolder;
+        this.dataSet = dataSet;
         checked = new ArrayList<>();
-        dataSet = songs;
     }
 
     public ArrayList<Song> getDataSet() {
         return dataSet;
     }
 
+    public void swapDataSet(ArrayList<Song> dataSet) {
+        this.dataSet = dataSet;
+        notifyDataSetChanged();
+    }
+
     @Nullable
     @Override
     public View getView(final int position, @Nullable View convertView, ViewGroup parent) {

app/src/main/java/com/kabouzeid/gramophone/ui/activities/AlbumDetailActivity.java

@@ -10,6 +10,7 @@ import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.support.v4.util.Pair;
 import android.support.v7.widget.GridLayoutManager;
+import android.support.v7.widget.RecyclerView;
 import android.support.v7.widget.Toolbar;
 import android.transition.Transition;
 import android.view.Menu;
@@ -35,6 +36,7 @@ import com.kabouzeid.gramophone.loader.AlbumSongLoader;
 import com.kabouzeid.gramophone.misc.SmallObservableScrollViewCallbacks;
 import com.kabouzeid.gramophone.misc.SmallTransitionListener;
 import com.kabouzeid.gramophone.model.Album;
+import com.kabouzeid.gramophone.model.Song;
 import com.kabouzeid.gramophone.ui.activities.base.AbsSlidingMusicPanelActivity;
 import com.kabouzeid.gramophone.ui.activities.tageditor.AbsTagEditorActivity;
 import com.kabouzeid.gramophone.ui.activities.tageditor.AlbumTagEditorActivity;
@@ -50,6 +52,8 @@ import com.nostra13.universalimageloader.core.assist.FailReason;
 import com.nostra13.universalimageloader.core.listener.SimpleImageLoadingListener;
 import com.nostra13.universalimageloader.core.process.BitmapProcessor;
 
+import java.util.ArrayList;
+
 import butterknife.Bind;
 import butterknife.ButterKnife;
 
@@ -187,7 +191,7 @@ public class AlbumDetailActivity extends AbsSlidingMusicPanelActivity implements
 
     private void setUpViews() {
         albumTitleView.setText(album.title);
-        setUpListView();
+        setUpRecyclerViewView();
         setUpSongsAdapter();
         setUpAlbumArtAndApplyPalette();
     }
@@ -267,7 +271,7 @@ public class AlbumDetailActivity extends AbsSlidingMusicPanelActivity implements
         return toolbarColor;
     }
 
-    private void setUpListView() {
+    private void setUpRecyclerViewView() {
         recyclerView.setScrollViewCallbacks(observableScrollViewCallbacks);
         recyclerView.setPadding(0, albumArtViewHeight + titleViewHeight, 0, bottomOffset);
         final View contentView = getWindow().getDecorView().findViewById(android.R.id.content);
@@ -290,9 +294,24 @@ public class AlbumDetailActivity extends AbsSlidingMusicPanelActivity implements
     }
 
     private void setUpSongsAdapter() {
-        adapter = new AlbumSongAdapter(this, AlbumSongLoader.getAlbumSongList(this, album.id), R.layout.item_list, this);
+        adapter = new AlbumSongAdapter(this, loadSongDataSet(), R.layout.item_list, this);
         recyclerView.setLayoutManager(new GridLayoutManager(this, 1));
         recyclerView.setAdapter(adapter);
+        adapter.registerAdapterDataObserver(new RecyclerView.AdapterDataObserver() {
+            @Override
+            public void onChanged() {
+                super.onChanged();
+                if (adapter.getItemCount() == 0) finish();
+            }
+        });
+    }
+
+    private void reloadDataSet() {
+        adapter.swapDataSet(loadSongDataSet());
+    }
+
+    private ArrayList<Song> loadSongDataSet() {
+        return AlbumSongLoader.getAlbumSongList(this, album.id);
     }
 
     @Override
@@ -395,4 +414,10 @@ public class AlbumDetailActivity extends AbsSlidingMusicPanelActivity implements
             super.onBackPressed();
         }
     }
+
+    @Override
+    public void onMediaStoreChanged() {
+        super.onMediaStoreChanged();
+        reloadDataSet();
+    }
 }

app/src/main/java/com/kabouzeid/gramophone/ui/activities/ArtistDetailActivity.java

@@ -43,7 +43,9 @@ import com.kabouzeid.gramophone.loader.ArtistLoader;
 import com.kabouzeid.gramophone.loader.ArtistSongLoader;
 import com.kabouzeid.gramophone.misc.SmallObservableScrollViewCallbacks;
 import com.kabouzeid.gramophone.misc.SmallTransitionListener;
+import com.kabouzeid.gramophone.model.Album;
 import com.kabouzeid.gramophone.model.Artist;
+import com.kabouzeid.gramophone.model.Song;
 import com.kabouzeid.gramophone.ui.activities.base.AbsSlidingMusicPanelActivity;
 import com.kabouzeid.gramophone.util.ColorUtil;
 import com.kabouzeid.gramophone.util.MusicUtil;
@@ -58,6 +60,8 @@ import com.nostra13.universalimageloader.core.assist.FailReason;
 import com.nostra13.universalimageloader.core.listener.SimpleImageLoadingListener;
 import com.nostra13.universalimageloader.core.process.BitmapProcessor;
 
+import java.util.ArrayList;
+
 import butterknife.Bind;
 import butterknife.ButterKnife;
 import retrofit.Callback;
@@ -226,7 +230,7 @@ public class ArtistDetailActivity extends AbsSlidingMusicPanelActivity implement
         songListView.setPadding(0, artistImageViewHeight + titleViewHeight, 0, bottomOffset);
         songListView.addHeaderView(songListHeader);
 
-        songAdapter = new ArtistSongAdapter(this, ArtistSongLoader.getArtistSongList(this, artist.id), this);
+        songAdapter = new ArtistSongAdapter(this, loadSongDataSet(), this);
         songListView.setAdapter(songAdapter);
 
         final View contentView = getWindow().getDecorView().findViewById(android.R.id.content);
@@ -241,8 +245,28 @@ public class ArtistDetailActivity extends AbsSlidingMusicPanelActivity implement
 
     private void setUpAlbumRecyclerView() {
         albumRecyclerView.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false));
-        albumAdapter = new HorizontalAlbumAdapter(this, ArtistAlbumLoader.getArtistAlbumList(this, artist.id), this);
+        albumAdapter = new HorizontalAlbumAdapter(this, loadAlbumDataSet(), this);
         albumRecyclerView.setAdapter(albumAdapter);
+        albumAdapter.registerAdapterDataObserver(new RecyclerView.AdapterDataObserver() {
+            @Override
+            public void onChanged() {
+                super.onChanged();
+                if (albumAdapter.getItemCount() == 0) finish();
+            }
+        });
+    }
+
+    private void reloadDataSets() {
+        songAdapter.swapDataSet(loadSongDataSet());
+        albumAdapter.swapDataSet(loadAlbumDataSet());
+    }
+
+    private ArrayList<Song> loadSongDataSet() {
+        return ArtistSongLoader.getArtistSongList(this, artist.id);
+    }
+
+    private ArrayList<Album> loadAlbumDataSet() {
+        return ArtistAlbumLoader.getArtistAlbumList(this, artist.id);
     }
 
     private void loadBiography() {
@@ -496,4 +520,10 @@ public class ArtistDetailActivity extends AbsSlidingMusicPanelActivity implement
             super.onBackPressed();
         }
     }
+
+    @Override
+    public void onMediaStoreChanged() {
+        super.onMediaStoreChanged();
+        reloadDataSets();
+    }
 }

app/src/main/java/com/kabouzeid/gramophone/ui/activities/PlaylistDetailActivity.java

@@ -21,6 +21,7 @@ import com.kabouzeid.gramophone.interfaces.CabHolder;
 import com.kabouzeid.gramophone.loader.PlaylistSongLoader;
 import com.kabouzeid.gramophone.misc.DragSortRecycler;
 import com.kabouzeid.gramophone.model.Playlist;
+import com.kabouzeid.gramophone.model.PlaylistSong;
 import com.kabouzeid.gramophone.model.Song;
 import com.kabouzeid.gramophone.model.smartplaylist.AbsSmartPlaylist;
 import com.kabouzeid.gramophone.ui.activities.base.AbsSlidingMusicPanelActivity;
@@ -28,6 +29,9 @@ import com.kabouzeid.gramophone.util.NavigationUtil;
 import com.kabouzeid.gramophone.util.PlaylistsUtil;
 import com.kabouzeid.gramophone.util.PreferenceUtil;
 
+import java.util.ArrayList;
+import java.util.List;
+
 import butterknife.Bind;
 import butterknife.ButterKnife;
 
@@ -71,9 +75,9 @@ public class PlaylistDetailActivity extends AbsSlidingMusicPanelActivity impleme
     private void setUpRecyclerView() {
         recyclerView.setLayoutManager(new GridLayoutManager(this, 1));
         if (playlist instanceof AbsSmartPlaylist) {
-            adapter = new SmartPlaylistSongAdapter(this, ((AbsSmartPlaylist) playlist).getSongs(this), R.layout.item_list, this);
+            adapter = new SmartPlaylistSongAdapter(this, loadSmartPlaylistDataSet(), R.layout.item_list, this);
         } else {
-            adapter = new PlaylistSongAdapter(this, PlaylistSongLoader.getPlaylistSongList(this, playlist.id), R.layout.item_list, this);
+            adapter = new PlaylistSongAdapter(this, loadPlaylistDataSet(), R.layout.item_list, this);
 
             DragSortRecycler dragSortRecycler = new DragSortRecycler();
             dragSortRecycler.setViewHandleId(R.id.image);
@@ -96,6 +100,31 @@ public class PlaylistDetailActivity extends AbsSlidingMusicPanelActivity impleme
             recyclerView.setItemAnimator(null);
         }
         recyclerView.setAdapter(adapter);
+
+        adapter.registerAdapterDataObserver(new RecyclerView.AdapterDataObserver() {
+            @Override
+            public void onChanged() {
+                super.onChanged();
+                checkIsEmpty();
+            }
+        });
+    }
+
+    private void reloadDataSet() {
+        if (playlist instanceof AbsSmartPlaylist) {
+            adapter.swapDataSet(loadSmartPlaylistDataSet());
+        } else {
+            //noinspection unchecked
+            adapter.swapDataSet((ArrayList<Song>) (List) loadPlaylistDataSet());
+        }
+    }
+
+    private ArrayList<PlaylistSong> loadPlaylistDataSet() {
+        return PlaylistSongLoader.getPlaylistSongList(this, playlist.id);
+    }
+
+    private ArrayList<Song> loadSmartPlaylistDataSet() {
+        return ((AbsSmartPlaylist) playlist).getSongs(this);
     }
 
     private void setUpToolBar() {
@@ -170,6 +199,12 @@ public class PlaylistDetailActivity extends AbsSlidingMusicPanelActivity impleme
         }
     }
 
+    @Override
+    public void onMediaStoreChanged() {
+        super.onMediaStoreChanged();
+        reloadDataSet();
+    }
+
     private void checkIsEmpty() {
         empty.setVisibility(
                 adapter.getItemCount() == 0 ? View.VISIBLE : View.GONE

app/src/main/java/com/kabouzeid/gramophone/ui/activities/SearchActivity.java

@@ -21,13 +21,13 @@ import android.widget.TextView;
 
 import com.kabouzeid.gramophone.R;
 import com.kabouzeid.gramophone.adapter.SearchAdapter;
-import com.kabouzeid.gramophone.ui.activities.base.AbsBaseActivity;
+import com.kabouzeid.gramophone.ui.activities.base.AbsMusicStateActivity;
 import com.kabouzeid.gramophone.util.Util;
 
 import butterknife.Bind;
 import butterknife.ButterKnife;
 
-public class SearchActivity extends AbsBaseActivity {
+public class SearchActivity extends AbsMusicStateActivity {
 
     public static final String TAG = SearchActivity.class.getSimpleName();
     @Bind(R.id.recycler_view)
@@ -38,10 +38,11 @@ public class SearchActivity extends AbsBaseActivity {
     @Bind(android.R.id.empty)
     TextView empty;
 
-
     private SearchView searchView;
     private SearchAdapter searchAdapter;
 
+    private String searchQuery = "";
+
     @SuppressLint("NewApi")
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -138,9 +139,16 @@ public class SearchActivity extends AbsBaseActivity {
     }
 
     private void search(@NonNull String query) {
+        searchQuery = query;
         if (searchAdapter != null) {
             searchAdapter.search(query);
             empty.setVisibility(searchAdapter.getItemCount() < 1 ? View.VISIBLE : View.GONE);
         }
     }
+
+    @Override
+    public void onMediaStoreChanged() {
+        super.onMediaStoreChanged();
+        search(searchQuery);
+    }
 }

app/src/main/java/com/kabouzeid/gramophone/ui/fragments/mainactivityfragments/AbsMainActivityRecyclerViewFragment.java

@@ -59,7 +59,7 @@ public abstract class AbsMainActivityRecyclerViewFragment<A extends RecyclerView
 
         setUpRecyclerView();
 
-        showEmptyMessageIfEmpty();
+        checkIsEmpty();
     }
 
     private void setUpRecyclerView() {
@@ -73,7 +73,7 @@ public abstract class AbsMainActivityRecyclerViewFragment<A extends RecyclerView
             @Override
             public void onChanged() {
                 super.onChanged();
-                showEmptyMessageIfEmpty();
+                checkIsEmpty();
             }
         });
         recyclerView.setAdapter(adapter);
@@ -131,7 +131,7 @@ public abstract class AbsMainActivityRecyclerViewFragment<A extends RecyclerView
         recyclerView.setEnabled(false);
     }
 
-    private void showEmptyMessageIfEmpty() {
+    private void checkIsEmpty() {
         if (empty != null) {
             RecyclerView.Adapter adapter = getAdapter();
             if (adapter != null) {