Add fast scroller to more stuff as well as fixed some bugs with it

10 files changed, 173 insertions, 204 deletions

diff --git a/app/src/main/java/github/daneren2005/dsub/adapter/AlbumListAdapter.java b/app/src/main/java/github/daneren2005/dsub/adapter/AlbumListAdapter.java
deleted file mode 100644
index 47f82259..00000000
--- a/app/src/main/java/github/daneren2005/dsub/adapter/AlbumListAdapter.java
+++ /dev/null
@@ -1,165 +0,0 @@
-/*
- This file is part of Subsonic.
-
- Subsonic is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Subsonic is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Subsonic.  If not, see <http://www.gnu.org/licenses/>.
-
- Copyright 2010 (C) Sindre Mehus
- */
-package github.daneren2005.dsub.adapter;
-
-import android.content.Context;
-import android.util.Log;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.ArrayAdapter;
-import android.widget.SectionIndexer;
-
-import com.commonsware.cwac.endless.EndlessAdapter;
-import github.daneren2005.dsub.R;
-import github.daneren2005.dsub.domain.MusicDirectory;
-import github.daneren2005.dsub.domain.ServerInfo;
-import github.daneren2005.dsub.service.MusicService;
-import github.daneren2005.dsub.service.MusicServiceFactory;
-
-import java.util.ArrayList;
-import java.util.LinkedHashSet;
-import java.util.List;
-import java.util.Set;
-
-public class AlbumListAdapter extends EndlessAdapter implements SectionIndexer {
-	private static final String TAG = AlbumListAdapter.class.getSimpleName();
-	Context context;
-	ArrayAdapter<MusicDirectory.Entry> adapter;
-	String type;
-	String extra;
-	int size;
-	int offset;
-	List<MusicDirectory.Entry> entries;
-
-	private boolean shouldIndex = false;
-	private Object[] sections;
-	private Integer[] positions;
-	
-	public AlbumListAdapter(Context context, ArrayAdapter<MusicDirectory.Entry> adapter, String type, String extra, int size) {
-		super(adapter);
-		this.context = context;
-		this.adapter = adapter;
-		this.type = type;
-		this.extra = extra;
-		this.size = size;
-		this.offset = size;
-
-		if("alphabeticalByName".equals(this.type)) {
-			shouldIndex = true;
-			recreateIndexes();
-		}
-	}
-	
-	@Override
-	protected boolean cacheInBackground() throws Exception {
-		MusicService service = MusicServiceFactory.getMusicService(context);
-		MusicDirectory result;
-		if(("genres".equals(type) && ServerInfo.checkServerVersion(context, "1.10.0")) || "years".equals(type)) {
-			result = service.getAlbumList(type, extra, size, offset, false, context, null);
-		} else if("genres".equals(type) || "genres-songs".equals(type)) {
-			result = service.getSongsByGenre(extra, size, offset, context, null);
-		} else {
-			result = service.getAlbumList(type, size, offset, shouldIndex, context, null);
-		}
-		entries = result.getChildren();
-		return entries.size() > 0;
-	}
-
-	@Override
-	protected void appendCachedData() {
-		for(MusicDirectory.Entry entry: entries) {
-			adapter.add(entry);
-		}
-		offset += entries.size();
-		recreateIndexes();
-	}
-	
-	@Override
-	protected View getPendingView(ViewGroup parent) {
-		View progress = LayoutInflater.from(context).inflate(R.layout.tab_progress, null);
-		progress.setVisibility(View.VISIBLE);
-		return progress;
-	}
-
-	private void recreateIndexes() {
-		try {
-			if (!shouldIndex) {
-				return;
-			}
-
-			Set<String> sectionSet = new LinkedHashSet<String>(30);
-			List<Integer> positionList = new ArrayList<Integer>(30);
-			for (int i = 0; i < adapter.getCount(); i++) {
-				MusicDirectory.Entry entry = adapter.getItem(i);
-				String index;
-				if (entry.getAlbum() != null) {
-					index = entry.getAlbum().substring(0, 1);
-					if (!Character.isLetter(index.charAt(0))) {
-						index = "#";
-					}
-				} else {
-					index = "*";
-				}
-
-				if (!sectionSet.contains(index)) {
-					sectionSet.add(index);
-					positionList.add(i);
-				}
-			}
-			sections = sectionSet.toArray(new Object[sectionSet.size()]);
-			positions = positionList.toArray(new Integer[positionList.size()]);
-		} catch(Exception e) {
-			Log.e(TAG, "Error while recreating indexes");
-		}
-	}
-
-	@Override
-	public Object[] getSections() {
-		if(sections != null) {
-			return sections;
-		} else {
-			return new Object[0];
-		}
-	}
-
-	@Override
-	public int getPositionForSection(int section) {
-		if(sections != null) {
-			section = Math.min(section, positions.length - 1);
-			return positions[section];
-		} else {
-			return 0;
-		}
-	}
-
-	@Override
-	public int getSectionForPosition(int pos) {
-		if(sections != null) {
-			for (int i = 0; i < sections.length - 1; i++) {
-				if (pos < positions[i + 1]) {
-					return i;
-				}
-			}
-			return sections.length - 1;
-		} else {
-			return 0;
-		}
-	}
-}
diff --git a/app/src/main/java/github/daneren2005/dsub/adapter/AlphabeticalAlbumAdapter.java b/app/src/main/java/github/daneren2005/dsub/adapter/AlphabeticalAlbumAdapter.java
new file mode 100644
index 00000000..ccb3df4e
--- /dev/null
+++ b/app/src/main/java/github/daneren2005/dsub/adapter/AlphabeticalAlbumAdapter.java
@@ -0,0 +1,44 @@
+/*
+  This file is part of Subsonic.
+	Subsonic is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+	Subsonic is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU General Public License for more details.
+	You should have received a copy of the GNU General Public License
+	along with Subsonic. If not, see <http://www.gnu.org/licenses/>.
+	Copyright 2015 (C) Scott Jackson
+*/
+
+package github.daneren2005.dsub.adapter;
+
+import android.content.Context;
+
+import java.util.List;
+
+import github.daneren2005.dsub.domain.MusicDirectory;
+import github.daneren2005.dsub.util.ImageLoader;
+import github.daneren2005.dsub.view.FastScroller;
+
+public class AlphabeticalAlbumAdapter extends EntryInfiniteGridAdapter implements FastScroller.BubbleTextGetter {
+	public AlphabeticalAlbumAdapter(Context context, List<MusicDirectory.Entry> entries, ImageLoader imageLoader, boolean largeCell) {
+		super(context, entries, imageLoader, largeCell);
+	}
+
+	@Override
+	public String getTextToShowInBubble(int position) {
+		// Make sure that we are not trying to get an item for the loading placeholder
+		if(position >= sections.get(0).size()) {
+			if(sections.get(0).size() > 0) {
+				return getTextToShowInBubble(position - 1);
+			} else {
+				return "*";
+			}
+		} else {
+			return getNameIndex(getItemForPosition(position).getAlbum());
+		}
+	}
+}
diff --git a/app/src/main/java/github/daneren2005/dsub/adapter/ArtistAdapter.java b/app/src/main/java/github/daneren2005/dsub/adapter/ArtistAdapter.java
index 9116e587..2eea0e74 100644
--- a/app/src/main/java/github/daneren2005/dsub/adapter/ArtistAdapter.java
+++ b/app/src/main/java/github/daneren2005/dsub/adapter/ArtistAdapter.java
@@ -125,13 +125,7 @@ public class ArtistAdapter extends SectionAdapter<Artist> implements FastScrolle
 
 	@Override
 	public String getTextToShowInBubble(int position) {
-		Artist artist = getItemForPosition(position);
-
-		if(artist == null) {
-			return "";
-		} else {
-			return artist.getName().substring(0, 1);
-		}
+		return getNameIndex(getItemForPosition(position).getName(), true);
 	}
 
 	public interface OnMusicFolderChanged {
diff --git a/app/src/main/java/github/daneren2005/dsub/adapter/GenreAdapter.java b/app/src/main/java/github/daneren2005/dsub/adapter/GenreAdapter.java
index 7e6954f9..70aa5fe3 100644
--- a/app/src/main/java/github/daneren2005/dsub/adapter/GenreAdapter.java
+++ b/app/src/main/java/github/daneren2005/dsub/adapter/GenreAdapter.java
@@ -18,12 +18,13 @@ package github.daneren2005.dsub.adapter;
 import android.content.Context;
 import android.view.ViewGroup;
 import github.daneren2005.dsub.domain.Genre;
+import github.daneren2005.dsub.view.FastScroller;
 import github.daneren2005.dsub.view.GenreView;
 import github.daneren2005.dsub.view.UpdateView;
 
 import java.util.List;
 
-public class GenreAdapter extends SectionAdapter<Genre>{
+public class GenreAdapter extends SectionAdapter<Genre> implements FastScroller.BubbleTextGetter{
 	public static int VIEW_TYPE_GENRE = 1;
 
 	public GenreAdapter(Context context, List<Genre> genres, OnItemClickedListener listener) {
@@ -45,4 +46,9 @@ public class GenreAdapter extends SectionAdapter<Genre>{
 	public int getItemViewType(Genre item) {
 		return VIEW_TYPE_GENRE;
 	}
+
+	@Override
+	public String getTextToShowInBubble(int position) {
+		return getNameIndex(getItemForPosition(position).getName());
+	}
 }
diff --git a/app/src/main/java/github/daneren2005/dsub/adapter/PlaylistAdapter.java b/app/src/main/java/github/daneren2005/dsub/adapter/PlaylistAdapter.java
index d7a9e8d7..7f7aacff 100644
--- a/app/src/main/java/github/daneren2005/dsub/adapter/PlaylistAdapter.java
+++ b/app/src/main/java/github/daneren2005/dsub/adapter/PlaylistAdapter.java
@@ -62,12 +62,6 @@ public class PlaylistAdapter extends SectionAdapter<Playlist> implements FastScr
 
 	@Override
 	public String getTextToShowInBubble(int position) {
-		Playlist playlist = getItemForPosition(position);
-
-		if(playlist == null) {
-			return "";
-		} else {
-			return playlist.getName().substring(0, 1);
-		}
+		return getNameIndex(getItemForPosition(position).getName());
 	}
 }
diff --git a/app/src/main/java/github/daneren2005/dsub/adapter/PodcastChannelAdapter.java b/app/src/main/java/github/daneren2005/dsub/adapter/PodcastChannelAdapter.java
index c1b132c7..f3eed393 100644
--- a/app/src/main/java/github/daneren2005/dsub/adapter/PodcastChannelAdapter.java
+++ b/app/src/main/java/github/daneren2005/dsub/adapter/PodcastChannelAdapter.java
@@ -48,12 +48,6 @@ public class PodcastChannelAdapter extends SectionAdapter<PodcastChannel> implem
 
     @Override
     public String getTextToShowInBubble(int position) {
-        PodcastChannel podcast = getItemForPosition(position);
-
-        if(podcast == null) {
-            return "";
-        } else {
-            return podcast.getName().substring(0, 1);
-        }
+        return getNameIndex(getItemForPosition(position).getName());
     }
 }
diff --git a/app/src/main/java/github/daneren2005/dsub/adapter/SectionAdapter.java b/app/src/main/java/github/daneren2005/dsub/adapter/SectionAdapter.java
index eec1dedb..53cc5e99 100644
--- a/app/src/main/java/github/daneren2005/dsub/adapter/SectionAdapter.java
+++ b/app/src/main/java/github/daneren2005/dsub/adapter/SectionAdapter.java
@@ -16,6 +16,7 @@
 package github.daneren2005.dsub.adapter;
 
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.content.res.Resources;
 import android.os.Build;
 import android.support.v7.widget.PopupMenu;
@@ -39,7 +40,9 @@ import java.util.List;
 
 import github.daneren2005.dsub.R;
 import github.daneren2005.dsub.activity.SubsonicFragmentActivity;
+import github.daneren2005.dsub.util.Constants;
 import github.daneren2005.dsub.util.MenuUtil;
+import github.daneren2005.dsub.util.Util;
 import github.daneren2005.dsub.view.BasicHeaderView;
 import github.daneren2005.dsub.view.UpdateView;
 import github.daneren2005.dsub.view.UpdateView.UpdateViewHolder;
@@ -47,6 +50,7 @@ import github.daneren2005.dsub.view.UpdateView.UpdateViewHolder;
 public abstract class SectionAdapter<T> extends RecyclerView.Adapter<UpdateViewHolder<T>> {
 	private static String TAG = SectionAdapter.class.getSimpleName();
 	public static int VIEW_TYPE_HEADER = 0;
+	public static String[] ignoredArticles;
 
 	protected Context context;
 	protected List<String> headers;
@@ -461,6 +465,38 @@ public abstract class SectionAdapter<T> extends RecyclerView.Adapter<UpdateViewH
 		}
 	}
 
+	public String getNameIndex(String name) {
+		return getNameIndex(name, false);
+	}
+	public String getNameIndex(String name, boolean removeIgnoredArticles) {
+		if(name == null) {
+			return "*";
+		}
+
+		if(removeIgnoredArticles) {
+			if (ignoredArticles == null) {
+				SharedPreferences prefs = Util.getPreferences(context);
+				String ignoredArticlesString = prefs.getString(Constants.CACHE_KEY_IGNORE, "The El La Los Las Le Les");
+				ignoredArticles = ignoredArticlesString.split(" ");
+			}
+
+			name = name.toLowerCase();
+			for (String article : ignoredArticles) {
+				int index = name.indexOf(article.toLowerCase() + " ");
+				if (index == 0) {
+					name = name.substring(article.length() + 1);
+				}
+			}
+		}
+
+		String index = name.substring(0, 1).toUpperCase();
+		if (!Character.isLetter(index.charAt(0))) {
+			index = "#";
+		}
+
+		return index;
+	}
+
 	public interface OnItemClickedListener<T> {
 		void onItemClicked(T item);
 		void onCreateContextMenu(Menu menu, MenuInflater menuInflater, UpdateView<T> updateView, T item);
diff --git a/app/src/main/java/github/daneren2005/dsub/adapter/TopRatedAlbumAdapter.java b/app/src/main/java/github/daneren2005/dsub/adapter/TopRatedAlbumAdapter.java
new file mode 100644
index 00000000..876e5907
--- /dev/null
+++ b/app/src/main/java/github/daneren2005/dsub/adapter/TopRatedAlbumAdapter.java
@@ -0,0 +1,44 @@
+/*
+  This file is part of Subsonic.
+	Subsonic is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+	Subsonic is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU General Public License for more details.
+	You should have received a copy of the GNU General Public License
+	along with Subsonic. If not, see <http://www.gnu.org/licenses/>.
+	Copyright 2015 (C) Scott Jackson
+*/
+
+package github.daneren2005.dsub.adapter;
+
+import android.content.Context;
+
+import java.util.List;
+
+import github.daneren2005.dsub.domain.MusicDirectory;
+import github.daneren2005.dsub.util.ImageLoader;
+import github.daneren2005.dsub.view.FastScroller;
+
+public class TopRatedAlbumAdapter extends EntryInfiniteGridAdapter implements FastScroller.BubbleTextGetter {
+	public TopRatedAlbumAdapter(Context context, List<MusicDirectory.Entry> entries, ImageLoader imageLoader, boolean largeCell) {
+		super(context, entries, imageLoader, largeCell);
+	}
+
+	@Override
+	public String getTextToShowInBubble(int position) {
+		// Make sure that we are not trying to get an item for the loading placeholder
+		if(position >= sections.get(0).size()) {
+			if(sections.get(0).size() > 0) {
+				return getTextToShowInBubble(position - 1);
+			} else {
+				return "*";
+			}
+		} else {
+			return Integer.toString(getItemForPosition(position).getRating());
+		}
+	}
+}
diff --git a/app/src/main/java/github/daneren2005/dsub/fragments/SelectDirectoryFragment.java b/app/src/main/java/github/daneren2005/dsub/fragments/SelectDirectoryFragment.java
index a5c4ca2c..6fbf49bc 100644
--- a/app/src/main/java/github/daneren2005/dsub/fragments/SelectDirectoryFragment.java
+++ b/app/src/main/java/github/daneren2005/dsub/fragments/SelectDirectoryFragment.java
@@ -30,9 +30,11 @@ import android.widget.RatingBar;
 import android.widget.RelativeLayout;
 import android.widget.TextView;
 import github.daneren2005.dsub.R;
+import github.daneren2005.dsub.adapter.AlphabeticalAlbumAdapter;
 import github.daneren2005.dsub.adapter.EntryInfiniteGridAdapter;
 import github.daneren2005.dsub.adapter.EntryGridAdapter;
 import github.daneren2005.dsub.adapter.SectionAdapter;
+import github.daneren2005.dsub.adapter.TopRatedAlbumAdapter;
 import github.daneren2005.dsub.domain.ArtistInfo;
 import github.daneren2005.dsub.domain.MusicDirectory;
 import github.daneren2005.dsub.domain.ServerInfo;
@@ -57,6 +59,7 @@ import github.daneren2005.dsub.util.SilentBackgroundTask;
 import github.daneren2005.dsub.util.TabBackgroundTask;
 import github.daneren2005.dsub.util.UserUtil;
 import github.daneren2005.dsub.util.Util;
+import github.daneren2005.dsub.view.FastScroller;
 import github.daneren2005.dsub.view.GridSpacingDecoration;
 import github.daneren2005.dsub.view.MyLeadingMarginSpan2;
 import github.daneren2005.dsub.view.UpdateView;
@@ -72,6 +75,7 @@ public class SelectDirectoryFragment extends SubsonicFragment implements Section
 	private static final String TAG = SelectDirectoryFragment.class.getSimpleName();
 
 	private RecyclerView recyclerView;
+	private FastScroller fastScroller;
 	private EntryGridAdapter entryGridAdapter;
 	private Boolean licenseValid;
 	private List<Entry> albums;
@@ -113,7 +117,7 @@ public class SelectDirectoryFragment extends SubsonicFragment implements Section
 			restoredInstance = true;
 		}
 	}
-	
+
 	@Override
 	public void onSaveInstanceState(Bundle outState) {
 		super.onSaveInstanceState(outState);
@@ -161,7 +165,7 @@ public class SelectDirectoryFragment extends SubsonicFragment implements Section
 			}
 		}
 
-		rootView = inflater.inflate(R.layout.select_album, container, false);
+		rootView = inflater.inflate(R.layout.abstract_recycler_fragment, container, false);
 
 		refreshLayout = (SwipeRefreshLayout) rootView.findViewById(R.id.refresh_layout);
 		refreshLayout.setOnRefreshListener(this);
@@ -170,8 +174,9 @@ public class SelectDirectoryFragment extends SubsonicFragment implements Section
 			largeAlbums = true;
 		}
 
-		recyclerView = (RecyclerView) rootView.findViewById(R.id.select_album_entries);
+		recyclerView = (RecyclerView) rootView.findViewById(R.id.fragment_recycler);
 		recyclerView.setHasFixedSize(true);
+		fastScroller = (FastScroller) rootView.findViewById(R.id.fragment_fast_scroller);
 		setupScrollList(recyclerView);
 
 		if(largeAlbums) {
@@ -258,7 +263,7 @@ public class SelectDirectoryFragment extends SubsonicFragment implements Section
 				}
 				else {
 					menuInflater.inflate(R.menu.select_podcast_episode, menu);
-					
+
 					if(!UserUtil.canPodcast()) {
 						menu.removeItem(R.id.menu_download_all);
 					}
@@ -403,7 +408,7 @@ public class SelectDirectoryFragment extends SubsonicFragment implements Section
 		if(refreshListing) {
 			refresh = true;
 		}
-		
+
 		if(currentTask != null) {
 			currentTask.cancel();
 		}
@@ -459,7 +464,7 @@ public class SelectDirectoryFragment extends SubsonicFragment implements Section
 
 				return dir;
 			}
-			
+
 			@Override
 			protected void done(Pair<MusicDirectory, Boolean> result) {
 				SelectDirectoryFragment.this.name = result.getFirst().getName();
@@ -468,7 +473,7 @@ public class SelectDirectoryFragment extends SubsonicFragment implements Section
 			}
 		}.execute();
 	}
-	
+
 	private void getRecursiveMusicDirectory(final String id, final String name, final boolean refresh) {
 		setTitle(name);
 
@@ -486,7 +491,7 @@ public class SelectDirectoryFragment extends SubsonicFragment implements Section
 				root.replaceChildren(songs);
 				return root;
 			}
-			
+
 			private void getSongsRecursively(MusicDirectory parent, List<Entry> songs) throws Exception {
 				songs.addAll(parent.getChildren(false, true));
 				for (Entry dir : parent.getChildren(true, false)) {
@@ -501,7 +506,7 @@ public class SelectDirectoryFragment extends SubsonicFragment implements Section
 					getSongsRecursively(musicDirectory, songs);
 				}
 			}
-			
+
 			@Override
 			protected void done(Pair<MusicDirectory, Boolean> result) {
 				SelectDirectoryFragment.this.name = result.getFirst().getName();
@@ -521,7 +526,7 @@ public class SelectDirectoryFragment extends SubsonicFragment implements Section
 			}
 		}.execute();
 	}
-	
+
 	private void getPodcast(final String podcastId, final String podcastName, final boolean refresh) {
 		setTitle(podcastName);
 
@@ -602,7 +607,7 @@ public class SelectDirectoryFragment extends SubsonicFragment implements Section
 		public LoadTask(boolean refresh) {
 			super(SelectDirectoryFragment.this);
 			this.refresh = refresh;
-			
+
 			currentTask = this;
 		}
 
@@ -613,7 +618,7 @@ public class SelectDirectoryFragment extends SubsonicFragment implements Section
 		  MusicService musicService = MusicServiceFactory.getMusicService(context);
 			MusicDirectory dir = load(musicService);
 			licenseValid = musicService.isLicenseValid(context, this);
-			
+
 			albums = dir.getChildren(true, false);
 			entries = dir.getChildren();
 
@@ -641,7 +646,7 @@ public class SelectDirectoryFragment extends SubsonicFragment implements Section
 					Log.w(TAG, "Failed to get Artist Info even though it should be supported");
 				}
 			}
-			
+
 			return new Pair<MusicDirectory, Boolean>(dir, licenseValid);
 		}
 
@@ -671,7 +676,13 @@ public class SelectDirectoryFragment extends SubsonicFragment implements Section
 			entryGridAdapter = new EntryGridAdapter(context, entries, getImageLoader(), largeAlbums);
 			entryGridAdapter.setRemoveFromPlaylist(playlistId != null);
 		} else {
-			entryGridAdapter = new EntryInfiniteGridAdapter(context, entries, getImageLoader(), largeAlbums);
+			if("alphabeticalByName".equals(albumListType)) {
+				entryGridAdapter = new AlphabeticalAlbumAdapter(context, entries, getImageLoader(), largeAlbums);
+			} else if("highest".equals(albumListType)) {
+				entryGridAdapter = new TopRatedAlbumAdapter(context, entries, getImageLoader(), largeAlbums);
+			} else {
+				entryGridAdapter = new EntryInfiniteGridAdapter(context, entries, getImageLoader(), largeAlbums);
+			}
 
 			// Setup infinite loading based on scrolling
 			final EntryInfiniteGridAdapter infiniteGridAdapter = (EntryInfiniteGridAdapter) entryGridAdapter;
@@ -763,6 +774,9 @@ public class SelectDirectoryFragment extends SubsonicFragment implements Section
 		}
 
 		recyclerView.setAdapter(entryGridAdapter);
+		if(entryGridAdapter instanceof FastScroller.BubbleTextGetter) {
+			fastScroller.attachRecyclerView(recyclerView);
+		}
 		context.supportInvalidateOptionsMenu();
 
 		if(scrollToPosition != -1) {
diff --git a/app/src/main/java/github/daneren2005/dsub/view/FastScroller.java b/app/src/main/java/github/daneren2005/dsub/view/FastScroller.java
index ee7aef4b..1cc11c08 100644
--- a/app/src/main/java/github/daneren2005/dsub/view/FastScroller.java
+++ b/app/src/main/java/github/daneren2005/dsub/view/FastScroller.java
@@ -24,6 +24,7 @@ import android.support.annotation.NonNull;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
 import android.util.AttributeSet;
+import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.MotionEvent;
 import android.view.View;
@@ -35,6 +36,7 @@ import github.daneren2005.dsub.R;
 import static android.support.v7.widget.RecyclerView.OnScrollListener;
 
 public class FastScroller extends LinearLayout {
+	private static final String TAG = FastScroller.class.getSimpleName();
 	private static final int BUBBLE_ANIMATION_DURATION = 100;
 	private static final int TRACK_SNAP_RANGE = 5;
 
@@ -57,7 +59,7 @@ public class FastScroller extends LinearLayout {
 	}
 
 	public FastScroller(final Context context,final AttributeSet attrs) {
-		super(context,attrs);
+		super(context, attrs);
 		initialise(context);
 	}
 
@@ -134,8 +136,14 @@ public class FastScroller extends LinearLayout {
 				proportion = y/(float)height;
 			int targetPos = getValueInRange(0,itemCount-1,(int)(proportion*(float)itemCount));
 			((LinearLayoutManager)recyclerView.getLayoutManager()).scrollToPositionWithOffset(targetPos,0);
-			String bubbleText = ((BubbleTextGetter)recyclerView.getAdapter()).getTextToShowInBubble(targetPos);
-			bubble.setText(bubbleText);
+
+			try {
+				String bubbleText = ((BubbleTextGetter) recyclerView.getAdapter()).getTextToShowInBubble(targetPos);
+				bubble.setText(bubbleText);
+			} catch(Exception e) {
+				Log.e(TAG, "Item count: " + itemCount);
+				Log.e(TAG, "Error getting text for bubble", e);
+			}
 		}
 	}