| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.example.android.mediabrowserservice; |
| |
| import android.app.PendingIntent; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.graphics.Bitmap; |
| import android.media.MediaDescription; |
| import android.media.MediaMetadata; |
| import android.media.browse.MediaBrowser.MediaItem; |
| import android.media.session.MediaSession; |
| import android.media.session.PlaybackState; |
| import android.net.Uri; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.os.Message; |
| import android.os.SystemClock; |
| import android.service.media.MediaBrowserService; |
| import android.text.TextUtils; |
| |
| import com.example.android.mediabrowserservice.model.MusicProvider; |
| import com.example.android.mediabrowserservice.utils.CarHelper; |
| import com.example.android.mediabrowserservice.utils.LogHelper; |
| import com.example.android.mediabrowserservice.utils.MediaIDHelper; |
| import com.example.android.mediabrowserservice.utils.QueueHelper; |
| |
| import java.lang.ref.WeakReference; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import static com.example.android.mediabrowserservice.utils.MediaIDHelper.MEDIA_ID_MUSICS_BY_GENRE; |
| import static com.example.android.mediabrowserservice.utils.MediaIDHelper.MEDIA_ID_ROOT; |
| import static com.example.android.mediabrowserservice.utils.MediaIDHelper.createBrowseCategoryMediaID; |
| |
| /** |
| * This class provides a MediaBrowser through a service. It exposes the media library to a browsing |
| * client, through the onGetRoot and onLoadChildren methods. It also creates a MediaSession and |
| * exposes it through its MediaSession.Token, which allows the client to create a MediaController |
| * that connects to and send control commands to the MediaSession remotely. This is useful for |
| * user interfaces that need to interact with your media session, like Android Auto. You can |
| * (should) also use the same service from your app's UI, which gives a seamless playback |
| * experience to the user. |
| * |
| * To implement a MediaBrowserService, you need to: |
| * |
| * <ul> |
| * |
| * <li> Extend {@link android.service.media.MediaBrowserService}, implementing the media browsing |
| * related methods {@link android.service.media.MediaBrowserService#onGetRoot} and |
| * {@link android.service.media.MediaBrowserService#onLoadChildren}; |
| * <li> In onCreate, start a new {@link android.media.session.MediaSession} and notify its parent |
| * with the session's token {@link android.service.media.MediaBrowserService#setSessionToken}; |
| * |
| * <li> Set a callback on the |
| * {@link android.media.session.MediaSession#setCallback(android.media.session.MediaSession.Callback)}. |
| * The callback will receive all the user's actions, like play, pause, etc; |
| * |
| * <li> Handle all the actual music playing using any method your app prefers (for example, |
| * {@link android.media.MediaPlayer}) |
| * |
| * <li> Update playbackState, "now playing" metadata and queue, using MediaSession proper methods |
| * {@link android.media.session.MediaSession#setPlaybackState(android.media.session.PlaybackState)} |
| * {@link android.media.session.MediaSession#setMetadata(android.media.MediaMetadata)} and |
| * {@link android.media.session.MediaSession#setQueue(java.util.List)}) |
| * |
| * <li> Declare and export the service in AndroidManifest with an intent receiver for the action |
| * android.media.browse.MediaBrowserService |
| * |
| * </ul> |
| * |
| * To make your app compatible with Android Auto, you also need to: |
| * |
| * <ul> |
| * |
| * <li> Declare a meta-data tag in AndroidManifest.xml linking to a xml resource |
| * with a <automotiveApp> root element. For a media app, this must include |
| * an <uses name="media"/> element as a child. |
| * For example, in AndroidManifest.xml: |
| * <meta-data android:name="com.google.android.gms.car.application" |
| * android:resource="@xml/automotive_app_desc"/> |
| * And in res/values/automotive_app_desc.xml: |
| * <automotiveApp> |
| * <uses name="media"/> |
| * </automotiveApp> |
| * |
| * </ul> |
| |
| * @see <a href="README.md">README.md</a> for more details. |
| * |
| */ |
| |
| public class MusicService extends MediaBrowserService implements Playback.Callback { |
| |
| // The action of the incoming Intent indicating that it contains a command |
| // to be executed (see {@link #onStartCommand}) |
| public static final String ACTION_CMD = "com.example.android.mediabrowserservice.ACTION_CMD"; |
| // The key in the extras of the incoming Intent indicating the command that |
| // should be executed (see {@link #onStartCommand}) |
| public static final String CMD_NAME = "CMD_NAME"; |
| // A value of a CMD_NAME key in the extras of the incoming Intent that |
| // indicates that the music playback should be paused (see {@link #onStartCommand}) |
| public static final String CMD_PAUSE = "CMD_PAUSE"; |
| |
| private static final String TAG = LogHelper.makeLogTag(MusicService.class); |
| // Action to thumbs up a media item |
| private static final String CUSTOM_ACTION_THUMBS_UP = |
| "com.example.android.mediabrowserservice.THUMBS_UP"; |
| // Delay stopSelf by using a handler. |
| private static final int STOP_DELAY = 30000; |
| |
| // Music catalog manager |
| private MusicProvider mMusicProvider; |
| private MediaSession mSession; |
| // "Now playing" queue: |
| private List<MediaSession.QueueItem> mPlayingQueue; |
| private int mCurrentIndexOnQueue; |
| private MediaNotificationManager mMediaNotificationManager; |
| // Indicates whether the service was started. |
| private boolean mServiceStarted; |
| private DelayedStopHandler mDelayedStopHandler = new DelayedStopHandler(this); |
| private Playback mPlayback; |
| private PackageValidator mPackageValidator; |
| |
| /* |
| * (non-Javadoc) |
| * @see android.app.Service#onCreate() |
| */ |
| @Override |
| public void onCreate() { |
| super.onCreate(); |
| LogHelper.d(TAG, "onCreate"); |
| |
| mPlayingQueue = new ArrayList<>(); |
| mMusicProvider = new MusicProvider(); |
| mPackageValidator = new PackageValidator(this); |
| |
| // Start a new MediaSession |
| mSession = new MediaSession(this, "MusicService"); |
| setSessionToken(mSession.getSessionToken()); |
| mSession.setCallback(new MediaSessionCallback()); |
| mSession.setFlags(MediaSession.FLAG_HANDLES_MEDIA_BUTTONS | |
| MediaSession.FLAG_HANDLES_TRANSPORT_CONTROLS); |
| |
| mPlayback = new Playback(this, mMusicProvider); |
| mPlayback.setState(PlaybackState.STATE_NONE); |
| mPlayback.setCallback(this); |
| mPlayback.start(); |
| |
| Context context = getApplicationContext(); |
| Intent intent = new Intent(context, MusicPlayerActivity.class); |
| PendingIntent pi = PendingIntent.getActivity(context, 99 /*request code*/, |
| intent, PendingIntent.FLAG_UPDATE_CURRENT); |
| mSession.setSessionActivity(pi); |
| |
| Bundle extras = new Bundle(); |
| CarHelper.setSlotReservationFlags(extras, true, true, true); |
| mSession.setExtras(extras); |
| |
| updatePlaybackState(null); |
| |
| mMediaNotificationManager = new MediaNotificationManager(this); |
| } |
| |
| /** |
| * (non-Javadoc) |
| * @see android.app.Service#onStartCommand(android.content.Intent, int, int) |
| */ |
| @Override |
| public int onStartCommand(Intent startIntent, int flags, int startId) { |
| if (startIntent != null) { |
| String action = startIntent.getAction(); |
| String command = startIntent.getStringExtra(CMD_NAME); |
| if (ACTION_CMD.equals(action)) { |
| if (CMD_PAUSE.equals(command)) { |
| if (mPlayback != null && mPlayback.isPlaying()) { |
| handlePauseRequest(); |
| } |
| } |
| } |
| } |
| return START_STICKY; |
| } |
| |
| /** |
| * (non-Javadoc) |
| * @see android.app.Service#onDestroy() |
| */ |
| @Override |
| public void onDestroy() { |
| LogHelper.d(TAG, "onDestroy"); |
| // Service is being killed, so make sure we release our resources |
| handleStopRequest(null); |
| |
| mDelayedStopHandler.removeCallbacksAndMessages(null); |
| // Always release the MediaSession to clean up resources |
| // and notify associated MediaController(s). |
| mSession.release(); |
| } |
| |
| @Override |
| public BrowserRoot onGetRoot(String clientPackageName, int clientUid, Bundle rootHints) { |
| LogHelper.d(TAG, "OnGetRoot: clientPackageName=" + clientPackageName, |
| "; clientUid=" + clientUid + " ; rootHints=", rootHints); |
| // To ensure you are not allowing any arbitrary app to browse your app's contents, you |
| // need to check the origin: |
| if (!mPackageValidator.isCallerAllowed(this, clientPackageName, clientUid)) { |
| // If the request comes from an untrusted package, return null. No further calls will |
| // be made to other media browsing methods. |
| LogHelper.w(TAG, "OnGetRoot: IGNORING request from untrusted package " |
| + clientPackageName); |
| return null; |
| } |
| //noinspection StatementWithEmptyBody |
| if (CarHelper.isValidCarPackage(clientPackageName)) { |
| // Optional: if your app needs to adapt ads, music library or anything else that |
| // needs to run differently when connected to the car, this is where you should handle |
| // it. |
| } |
| return new BrowserRoot(MEDIA_ID_ROOT, null); |
| } |
| |
| @Override |
| public void onLoadChildren(final String parentMediaId, final Result<List<MediaItem>> result) { |
| if (!mMusicProvider.isInitialized()) { |
| // Use result.detach to allow calling result.sendResult from another thread: |
| result.detach(); |
| |
| mMusicProvider.retrieveMediaAsync(new MusicProvider.Callback() { |
| @Override |
| public void onMusicCatalogReady(boolean success) { |
| if (success) { |
| loadChildrenImpl(parentMediaId, result); |
| } else { |
| updatePlaybackState(getString(R.string.error_no_metadata)); |
| result.sendResult(Collections.<MediaItem>emptyList()); |
| } |
| } |
| }); |
| |
| } else { |
| // If our music catalog is already loaded/cached, load them into result immediately |
| loadChildrenImpl(parentMediaId, result); |
| } |
| } |
| |
| /** |
| * Actual implementation of onLoadChildren that assumes that MusicProvider is already |
| * initialized. |
| */ |
| private void loadChildrenImpl(final String parentMediaId, |
| final Result<List<MediaItem>> result) { |
| LogHelper.d(TAG, "OnLoadChildren: parentMediaId=", parentMediaId); |
| |
| List<MediaItem> mediaItems = new ArrayList<>(); |
| |
| if (MEDIA_ID_ROOT.equals(parentMediaId)) { |
| LogHelper.d(TAG, "OnLoadChildren.ROOT"); |
| mediaItems.add(new MediaItem( |
| new MediaDescription.Builder() |
| .setMediaId(MEDIA_ID_MUSICS_BY_GENRE) |
| .setTitle(getString(R.string.browse_genres)) |
| .setIconUri(Uri.parse("android.resource://" + |
| "com.example.android.mediabrowserservice/drawable/ic_by_genre")) |
| .setSubtitle(getString(R.string.browse_genre_subtitle)) |
| .build(), MediaItem.FLAG_BROWSABLE |
| )); |
| |
| } else if (MEDIA_ID_MUSICS_BY_GENRE.equals(parentMediaId)) { |
| LogHelper.d(TAG, "OnLoadChildren.GENRES"); |
| for (String genre : mMusicProvider.getGenres()) { |
| MediaItem item = new 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(), 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(); |
| MediaItem bItem = new 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); |
| } |
| |
| private final class MediaSessionCallback extends MediaSession.Callback { |
| @Override |
| public void onPlay() { |
| LogHelper.d(TAG, "play"); |
| |
| if (mPlayingQueue == null || mPlayingQueue.isEmpty()) { |
| mPlayingQueue = QueueHelper.getRandomQueue(mMusicProvider); |
| mSession.setQueue(mPlayingQueue); |
| mSession.setQueueTitle(getString(R.string.random_queue_title)); |
| // start playing from the beginning of the queue |
| mCurrentIndexOnQueue = 0; |
| } |
| |
| if (mPlayingQueue != null && !mPlayingQueue.isEmpty()) { |
| handlePlayRequest(); |
| } |
| } |
| |
| @Override |
| public void onSkipToQueueItem(long queueId) { |
| LogHelper.d(TAG, "OnSkipToQueueItem:" + queueId); |
| |
| if (mPlayingQueue != null && !mPlayingQueue.isEmpty()) { |
| // set the current index on queue from the music Id: |
| mCurrentIndexOnQueue = QueueHelper.getMusicIndexOnQueue(mPlayingQueue, queueId); |
| // play the music |
| handlePlayRequest(); |
| } |
| } |
| |
| @Override |
| public void onSeekTo(long position) { |
| LogHelper.d(TAG, "onSeekTo:", position); |
| mPlayback.seekTo((int) position); |
| } |
| |
| @Override |
| public void onPlayFromMediaId(String mediaId, Bundle extras) { |
| LogHelper.d(TAG, "playFromMediaId mediaId:", mediaId, " extras=", extras); |
| |
| // The mediaId used here is not the unique musicId. This one comes from the |
| // MediaBrowser, and is actually a "hierarchy-aware mediaID": a concatenation of |
| // the hierarchy in MediaBrowser and the actual unique musicID. This is necessary |
| // so we can build the correct playing queue, based on where the track was |
| // selected from. |
| mPlayingQueue = QueueHelper.getPlayingQueue(mediaId, mMusicProvider); |
| mSession.setQueue(mPlayingQueue); |
| String queueTitle = getString(R.string.browse_musics_by_genre_subtitle, |
| MediaIDHelper.extractBrowseCategoryValueFromMediaID(mediaId)); |
| mSession.setQueueTitle(queueTitle); |
| |
| if (mPlayingQueue != null && !mPlayingQueue.isEmpty()) { |
| // set the current index on queue from the media Id: |
| mCurrentIndexOnQueue = QueueHelper.getMusicIndexOnQueue(mPlayingQueue, mediaId); |
| |
| if (mCurrentIndexOnQueue < 0) { |
| LogHelper.e(TAG, "playFromMediaId: media ID ", mediaId, |
| " could not be found on queue. Ignoring."); |
| } else { |
| // play the music |
| handlePlayRequest(); |
| } |
| } |
| } |
| |
| @Override |
| public void onPause() { |
| LogHelper.d(TAG, "pause. current state=" + mPlayback.getState()); |
| handlePauseRequest(); |
| } |
| |
| @Override |
| public void onStop() { |
| LogHelper.d(TAG, "stop. current state=" + mPlayback.getState()); |
| handleStopRequest(null); |
| } |
| |
| @Override |
| public void onSkipToNext() { |
| LogHelper.d(TAG, "skipToNext"); |
| mCurrentIndexOnQueue++; |
| if (mPlayingQueue != null && mCurrentIndexOnQueue >= mPlayingQueue.size()) { |
| // This sample's behavior: skipping to next when in last song returns to the |
| // first song. |
| mCurrentIndexOnQueue = 0; |
| } |
| if (QueueHelper.isIndexPlayable(mCurrentIndexOnQueue, mPlayingQueue)) { |
| handlePlayRequest(); |
| } else { |
| LogHelper.e(TAG, "skipToNext: cannot skip to next. next Index=" + |
| mCurrentIndexOnQueue + " queue length=" + |
| (mPlayingQueue == null ? "null" : mPlayingQueue.size())); |
| handleStopRequest("Cannot skip"); |
| } |
| } |
| |
| @Override |
| public void onSkipToPrevious() { |
| LogHelper.d(TAG, "skipToPrevious"); |
| mCurrentIndexOnQueue--; |
| if (mPlayingQueue != null && mCurrentIndexOnQueue < 0) { |
| // This sample's behavior: skipping to previous when in first song restarts the |
| // first song. |
| mCurrentIndexOnQueue = 0; |
| } |
| if (QueueHelper.isIndexPlayable(mCurrentIndexOnQueue, mPlayingQueue)) { |
| handlePlayRequest(); |
| } else { |
| LogHelper.e(TAG, "skipToPrevious: cannot skip to previous. previous Index=" + |
| mCurrentIndexOnQueue + " queue length=" + |
| (mPlayingQueue == null ? "null" : mPlayingQueue.size())); |
| handleStopRequest("Cannot skip"); |
| } |
| } |
| |
| @Override |
| public void onCustomAction(String action, Bundle extras) { |
| if (CUSTOM_ACTION_THUMBS_UP.equals(action)) { |
| LogHelper.i(TAG, "onCustomAction: favorite for current track"); |
| MediaMetadata track = getCurrentPlayingMusic(); |
| if (track != null) { |
| String musicId = track.getString(MediaMetadata.METADATA_KEY_MEDIA_ID); |
| mMusicProvider.setFavorite(musicId, !mMusicProvider.isFavorite(musicId)); |
| } |
| // playback state needs to be updated because the "Favorite" icon on the |
| // custom action will change to reflect the new favorite state. |
| updatePlaybackState(null); |
| } else { |
| LogHelper.e(TAG, "Unsupported action: ", action); |
| } |
| } |
| |
| @Override |
| public void onPlayFromSearch(String query, Bundle extras) { |
| LogHelper.d(TAG, "playFromSearch query=", query); |
| |
| if (TextUtils.isEmpty(query)) { |
| // A generic search like "Play music" sends an empty query |
| // and it's expected that we start playing something. What will be played depends |
| // on the app: favorite playlist, "I'm feeling lucky", most recent, etc. |
| mPlayingQueue = QueueHelper.getRandomQueue(mMusicProvider); |
| } else { |
| mPlayingQueue = QueueHelper.getPlayingQueueFromSearch(query, mMusicProvider); |
| } |
| |
| LogHelper.d(TAG, "playFromSearch playqueue.length=" + mPlayingQueue.size()); |
| mSession.setQueue(mPlayingQueue); |
| |
| if (mPlayingQueue != null && !mPlayingQueue.isEmpty()) { |
| // immediately start playing from the beginning of the search results |
| mCurrentIndexOnQueue = 0; |
| |
| handlePlayRequest(); |
| } else { |
| // if nothing was found, we need to warn the user and stop playing |
| handleStopRequest(getString(R.string.no_search_results)); |
| } |
| } |
| } |
| |
| /** |
| * Handle a request to play music |
| */ |
| private void handlePlayRequest() { |
| LogHelper.d(TAG, "handlePlayRequest: mState=" + mPlayback.getState()); |
| |
| mDelayedStopHandler.removeCallbacksAndMessages(null); |
| if (!mServiceStarted) { |
| LogHelper.v(TAG, "Starting service"); |
| // The MusicService needs to keep running even after the calling MediaBrowser |
| // is disconnected. Call startService(Intent) and then stopSelf(..) when we no longer |
| // need to play media. |
| startService(new Intent(getApplicationContext(), MusicService.class)); |
| mServiceStarted = true; |
| } |
| |
| if (!mSession.isActive()) { |
| mSession.setActive(true); |
| } |
| |
| if (QueueHelper.isIndexPlayable(mCurrentIndexOnQueue, mPlayingQueue)) { |
| updateMetadata(); |
| mPlayback.play(mPlayingQueue.get(mCurrentIndexOnQueue)); |
| } |
| } |
| |
| /** |
| * Handle a request to pause music |
| */ |
| private void handlePauseRequest() { |
| LogHelper.d(TAG, "handlePauseRequest: mState=" + mPlayback.getState()); |
| mPlayback.pause(); |
| // reset the delayed stop handler. |
| mDelayedStopHandler.removeCallbacksAndMessages(null); |
| mDelayedStopHandler.sendEmptyMessageDelayed(0, STOP_DELAY); |
| } |
| |
| /** |
| * Handle a request to stop music |
| */ |
| private void handleStopRequest(String withError) { |
| LogHelper.d(TAG, "handleStopRequest: mState=" + mPlayback.getState() + " error=", withError); |
| mPlayback.stop(true); |
| // reset the delayed stop handler. |
| mDelayedStopHandler.removeCallbacksAndMessages(null); |
| mDelayedStopHandler.sendEmptyMessageDelayed(0, STOP_DELAY); |
| |
| updatePlaybackState(withError); |
| |
| // service is no longer necessary. Will be started again if needed. |
| stopSelf(); |
| mServiceStarted = false; |
| } |
| |
| private void updateMetadata() { |
| if (!QueueHelper.isIndexPlayable(mCurrentIndexOnQueue, mPlayingQueue)) { |
| LogHelper.e(TAG, "Can't retrieve current metadata."); |
| updatePlaybackState(getResources().getString(R.string.error_no_metadata)); |
| return; |
| } |
| MediaSession.QueueItem queueItem = mPlayingQueue.get(mCurrentIndexOnQueue); |
| String musicId = MediaIDHelper.extractMusicIDFromMediaID( |
| queueItem.getDescription().getMediaId()); |
| MediaMetadata track = mMusicProvider.getMusic(musicId); |
| final String trackId = track.getString(MediaMetadata.METADATA_KEY_MEDIA_ID); |
| if (!musicId.equals(trackId)) { |
| IllegalStateException e = new IllegalStateException("track ID should match musicId."); |
| LogHelper.e(TAG, "track ID should match musicId.", |
| " musicId=", musicId, " trackId=", trackId, |
| " mediaId from queueItem=", queueItem.getDescription().getMediaId(), |
| " title from queueItem=", queueItem.getDescription().getTitle(), |
| " mediaId from track=", track.getDescription().getMediaId(), |
| " title from track=", track.getDescription().getTitle(), |
| " source.hashcode from track=", track.getString( |
| MusicProvider.CUSTOM_METADATA_TRACK_SOURCE).hashCode(), |
| e); |
| throw e; |
| } |
| LogHelper.d(TAG, "Updating metadata for MusicID= " + musicId); |
| mSession.setMetadata(track); |
| |
| // Set the proper album artwork on the media session, so it can be shown in the |
| // locked screen and in other places. |
| if (track.getDescription().getIconBitmap() == null && |
| track.getDescription().getIconUri() != null) { |
| String albumUri = track.getDescription().getIconUri().toString(); |
| AlbumArtCache.getInstance().fetch(albumUri, new AlbumArtCache.FetchListener() { |
| @Override |
| public void onFetched(String artUrl, Bitmap bitmap, Bitmap icon) { |
| MediaSession.QueueItem queueItem = mPlayingQueue.get(mCurrentIndexOnQueue); |
| MediaMetadata track = mMusicProvider.getMusic(trackId); |
| track = new MediaMetadata.Builder(track) |
| |
| // set high resolution bitmap in METADATA_KEY_ALBUM_ART. This is used, for |
| // example, on the lockscreen background when the media session is active. |
| .putBitmap(MediaMetadata.METADATA_KEY_ALBUM_ART, bitmap) |
| |
| // set small version of the album art in the DISPLAY_ICON. This is used on |
| // the MediaDescription and thus it should be small to be serialized if |
| // necessary.. |
| .putBitmap(MediaMetadata.METADATA_KEY_DISPLAY_ICON, icon) |
| |
| .build(); |
| |
| mMusicProvider.updateMusic(trackId, track); |
| |
| // If we are still playing the same music |
| String currentPlayingId = MediaIDHelper.extractMusicIDFromMediaID( |
| queueItem.getDescription().getMediaId()); |
| if (trackId.equals(currentPlayingId)) { |
| mSession.setMetadata(track); |
| } |
| } |
| }); |
| } |
| } |
| |
| /** |
| * Update the current media player state, optionally showing an error message. |
| * |
| * @param error if not null, error message to present to the user. |
| */ |
| private void updatePlaybackState(String error) { |
| LogHelper.d(TAG, "updatePlaybackState, playback state=" + mPlayback.getState()); |
| long position = PlaybackState.PLAYBACK_POSITION_UNKNOWN; |
| if (mPlayback != null && mPlayback.isConnected()) { |
| position = mPlayback.getCurrentStreamPosition(); |
| } |
| |
| PlaybackState.Builder stateBuilder = new PlaybackState.Builder() |
| .setActions(getAvailableActions()); |
| |
| setCustomAction(stateBuilder); |
| int state = mPlayback.getState(); |
| |
| // If there is an error message, send it to the playback state: |
| if (error != null) { |
| // Error states are really only supposed to be used for errors that cause playback to |
| // stop unexpectedly and persist until the user takes action to fix it. |
| stateBuilder.setErrorMessage(error); |
| state = PlaybackState.STATE_ERROR; |
| } |
| stateBuilder.setState(state, position, 1.0f, SystemClock.elapsedRealtime()); |
| |
| // Set the activeQueueItemId if the current index is valid. |
| if (QueueHelper.isIndexPlayable(mCurrentIndexOnQueue, mPlayingQueue)) { |
| MediaSession.QueueItem item = mPlayingQueue.get(mCurrentIndexOnQueue); |
| stateBuilder.setActiveQueueItemId(item.getQueueId()); |
| } |
| |
| mSession.setPlaybackState(stateBuilder.build()); |
| |
| if (state == PlaybackState.STATE_PLAYING || state == PlaybackState.STATE_PAUSED) { |
| mMediaNotificationManager.startNotification(); |
| } |
| } |
| |
| private void setCustomAction(PlaybackState.Builder stateBuilder) { |
| MediaMetadata currentMusic = getCurrentPlayingMusic(); |
| if (currentMusic != null) { |
| // Set appropriate "Favorite" icon on Custom action: |
| String musicId = currentMusic.getString(MediaMetadata.METADATA_KEY_MEDIA_ID); |
| int favoriteIcon = R.drawable.ic_star_off; |
| if (mMusicProvider.isFavorite(musicId)) { |
| favoriteIcon = R.drawable.ic_star_on; |
| } |
| LogHelper.d(TAG, "updatePlaybackState, setting Favorite custom action of music ", |
| musicId, " current favorite=", mMusicProvider.isFavorite(musicId)); |
| stateBuilder.addCustomAction(CUSTOM_ACTION_THUMBS_UP, getString(R.string.favorite), |
| favoriteIcon); |
| } |
| } |
| |
| private long getAvailableActions() { |
| long actions = PlaybackState.ACTION_PLAY | PlaybackState.ACTION_PLAY_FROM_MEDIA_ID | |
| PlaybackState.ACTION_PLAY_FROM_SEARCH; |
| if (mPlayingQueue == null || mPlayingQueue.isEmpty()) { |
| return actions; |
| } |
| if (mPlayback.isPlaying()) { |
| actions |= PlaybackState.ACTION_PAUSE; |
| } |
| if (mCurrentIndexOnQueue > 0) { |
| actions |= PlaybackState.ACTION_SKIP_TO_PREVIOUS; |
| } |
| if (mCurrentIndexOnQueue < mPlayingQueue.size() - 1) { |
| actions |= PlaybackState.ACTION_SKIP_TO_NEXT; |
| } |
| return actions; |
| } |
| |
| private MediaMetadata getCurrentPlayingMusic() { |
| if (QueueHelper.isIndexPlayable(mCurrentIndexOnQueue, mPlayingQueue)) { |
| MediaSession.QueueItem item = mPlayingQueue.get(mCurrentIndexOnQueue); |
| if (item != null) { |
| LogHelper.d(TAG, "getCurrentPlayingMusic for musicId=", |
| item.getDescription().getMediaId()); |
| return mMusicProvider.getMusic( |
| MediaIDHelper.extractMusicIDFromMediaID(item.getDescription().getMediaId())); |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Implementation of the Playback.Callback interface |
| */ |
| @Override |
| public void onCompletion() { |
| // The media player finished playing the current song, so we go ahead |
| // and start the next. |
| if (mPlayingQueue != null && !mPlayingQueue.isEmpty()) { |
| // In this sample, we restart the playing queue when it gets to the end: |
| mCurrentIndexOnQueue++; |
| if (mCurrentIndexOnQueue >= mPlayingQueue.size()) { |
| mCurrentIndexOnQueue = 0; |
| } |
| handlePlayRequest(); |
| } else { |
| // If there is nothing to play, we stop and release the resources: |
| handleStopRequest(null); |
| } |
| } |
| |
| @Override |
| public void onPlaybackStatusChanged(int state) { |
| updatePlaybackState(null); |
| } |
| |
| @Override |
| public void onError(String error) { |
| updatePlaybackState(error); |
| } |
| |
| /** |
| * A simple handler that stops the service if playback is not active (playing) |
| */ |
| private static class DelayedStopHandler extends Handler { |
| private final WeakReference<MusicService> mWeakReference; |
| |
| private DelayedStopHandler(MusicService service) { |
| mWeakReference = new WeakReference<>(service); |
| } |
| |
| @Override |
| public void handleMessage(Message msg) { |
| MusicService service = mWeakReference.get(); |
| if (service != null && service.mPlayback != null) { |
| if (service.mPlayback.isPlaying()) { |
| LogHelper.d(TAG, "Ignoring delayed stop since the media player is in use."); |
| return; |
| } |
| LogHelper.d(TAG, "Stopping service with delay handler."); |
| service.stopSelf(); |
| service.mServiceStarted = false; |
| } |
| } |
| } |
| } |