public static List<MediaSession.QueueItem> getPlayingQueue( String mediaId, MusicProvider musicProvider) { // extract the browsing hierarchy from the media ID: String[] hierarchy = MediaIDHelper.getHierarchy(mediaId); if (hierarchy.length != 2) { LogHelper.e(TAG, "Could not build a playing queue for this mediaId: ", mediaId); return null; } String categoryType = hierarchy[0]; String categoryValue = hierarchy[1]; LogHelper.d(TAG, "Creating playing queue for ", categoryType, ", ", categoryValue); Iterable<MediaMetadata> tracks = null; // This sample only supports genre and by_search category types. if (categoryType.equals(MEDIA_ID_MUSICS_BY_GENRE)) { tracks = musicProvider.getMusicsByGenre(categoryValue); } else if (categoryType.equals(MEDIA_ID_MUSICS_BY_SEARCH)) { tracks = musicProvider.searchMusicBySongTitle(categoryValue); } if (tracks == null) { LogHelper.e(TAG, "Unrecognized category type: ", categoryType, " for media ", mediaId); return null; } return convertToQueue(tracks, hierarchy[0], hierarchy[1]); }
/** * Actual implementation of onLoadChildren that assumes that MusicProvider is already initialized. */ private void loadChildrenImpl( final String parentMediaId, final Result<List<MediaBrowser.MediaItem>> result) { LogHelper.d(TAG, "OnLoadChildren: parentMediaId=", parentMediaId); List<MediaBrowser.MediaItem> mediaItems = new ArrayList<>(); if (MEDIA_ID_ROOT.equals(parentMediaId)) { LogHelper.d(TAG, "OnLoadChildren.ROOT"); mediaItems.add( new MediaBrowser.MediaItem( new MediaDescription.Builder() .setMediaId(MEDIA_ID_MUSICS_BY_GENRE) .setTitle(getString(R.string.browse_genres)) .setIconUri( Uri.parse( "android.resource://" + "com.example.android.uamp/drawable/ic_by_genre")) .setSubtitle(getString(R.string.browse_genre_subtitle)) .build(), MediaBrowser.MediaItem.FLAG_BROWSABLE)); } else if (MEDIA_ID_MUSICS_BY_GENRE.equals(parentMediaId)) { LogHelper.d(TAG, "OnLoadChildren.GENRES"); for (String genre : mMusicProvider.getGenres()) { MediaBrowser.MediaItem item = new MediaBrowser.MediaItem( new MediaDescription.Builder() .setMediaId(createBrowseCategoryMediaID(MEDIA_ID_MUSICS_BY_GENRE, genre)) .setTitle(genre) .setSubtitle(getString(R.string.browse_musics_by_genre_subtitle, genre)) .build(), MediaBrowser.MediaItem.FLAG_BROWSABLE); mediaItems.add(item); } } else if (parentMediaId.startsWith(MEDIA_ID_MUSICS_BY_GENRE)) { String genre = MediaIDHelper.getHierarchy(parentMediaId)[1]; LogHelper.d(TAG, "OnLoadChildren.SONGS_BY_GENRE genre=", genre); for (MediaMetadata track : mMusicProvider.getMusicsByGenre(genre)) { // Since mediaMetadata fields are immutable, we need to create a copy, so we // can set a hierarchy-aware mediaID. We will need to know the media hierarchy // when we get a onPlayFromMusicID call, so we can create the proper queue based // on where the music was selected from (by artist, by genre, random, etc) String hierarchyAwareMediaID = MediaIDHelper.createMediaID( track.getDescription().getMediaId(), MEDIA_ID_MUSICS_BY_GENRE, genre); MediaMetadata trackCopy = new MediaMetadata.Builder(track) .putString(MediaMetadata.METADATA_KEY_MEDIA_ID, hierarchyAwareMediaID) .build(); MediaBrowser.MediaItem bItem = new MediaBrowser.MediaItem(trackCopy.getDescription(), MediaItem.FLAG_PLAYABLE); mediaItems.add(bItem); } } else { LogHelper.w(TAG, "Skipping unmatched parentMediaId: ", parentMediaId); } LogHelper.d(TAG, "OnLoadChildren sending ", mediaItems.size(), " results for ", parentMediaId); result.sendResult(mediaItems); }
/** * Create a random queue. * * @param musicProvider the provider used for fetching music. * @return list containing {@link MediaSession.QueueItem}'s */ public static List<MediaSession.QueueItem> getRandomQueue(MusicProvider musicProvider) { List<MediaMetadata> result = new ArrayList<>(); for (String genre : musicProvider.getGenres()) { Iterable<MediaMetadata> tracks = musicProvider.getMusicsByGenre(genre); for (MediaMetadata track : tracks) { if (ThreadLocalRandom.current().nextBoolean()) { result.add(track); } } } LogHelper.d(TAG, "getRandomQueue: result.size=", result.size()); Collections.shuffle(result); return convertToQueue(result, MEDIA_ID_MUSICS_BY_SEARCH, "random"); }
public static List<MediaSession.QueueItem> getPlayingQueueFromSearch( String query, Bundle queryParams, MusicProvider musicProvider) { LogHelper.d( TAG, "Creating playing queue for musics from search: ", query, " params=", queryParams); VoiceSearchParams params = new VoiceSearchParams(query, queryParams); LogHelper.d(TAG, "VoiceSearchParams: ", params); if (params.isAny) { // If isAny is true, we will play anything. This is app-dependent, and can be, // for example, favorite playlists, "I'm feeling lucky", most recent, etc. return getRandomQueue(musicProvider); } Iterable<MediaMetadata> result = null; if (params.isAlbumFocus) { result = musicProvider.searchMusicByAlbum(params.album); } else if (params.isGenreFocus) { result = musicProvider.getMusicsByGenre(params.genre); } else if (params.isArtistFocus) { result = musicProvider.searchMusicByArtist(params.artist); } else if (params.isSongFocus) { result = musicProvider.searchMusicBySongTitle(params.song); } // If there was no results using media focus parameter, we do an unstructured query. // This is useful when the user is searching for something that looks like an artist // to Google, for example, but is not. For example, a user searching for Madonna on // a PodCast application wouldn't get results if we only looked at the // Artist (podcast author). Then, we can instead do an unstructured search. if (params.isUnstructured || result == null || !result.iterator().hasNext()) { // To keep it simple for this example, we do unstructured searches on the // song title only. A real world application could search on other fields as well. result = musicProvider.searchMusicBySongTitle(query); } return convertToQueue(result, MEDIA_ID_MUSICS_BY_SEARCH, query); }