void HandlePlayRequest()
{
LogHelper.Debug(Tag, "handlePlayRequest: mState=" + playback.State);
delayedStopHandler.RemoveCallbacksAndMessages(null);
if (!serviceStarted)
{
LogHelper.Verbose(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(ApplicationContext, typeof(MusicService)));
serviceStarted = true;
}
if (!session.Active)
{
session.Active = true;
}
if (QueueHelper.isIndexPlayable(currentIndexOnQueue, playingQueue))
{
UpdateMetadata();
playback.Play(playingQueue [currentIndexOnQueue]);
}
}
void UpdateMetadata()
{
if (!QueueHelper.isIndexPlayable(currentIndexOnQueue, playingQueue))
{
LogHelper.Error(Tag, "Can't retrieve current metadata.");
UpdatePlaybackState(Resources.GetString(Resource.String.error_no_metadata));
return;
}
var queueItem = playingQueue [currentIndexOnQueue];
var musicId = MediaIDHelper.ExtractMusicIDFromMediaID(
queueItem.Description.MediaId);
var track = musicProvider.GetMusic(musicId);
var trackId = track.GetString(MediaMetadata.MetadataKeyMediaId);
if (musicId != trackId)
{
var e = new InvalidOperationException("track ID should match musicId.");
LogHelper.Error(Tag, "track ID should match musicId.",
" musicId=", musicId, " trackId=", trackId,
" mediaId from queueItem=", queueItem.Description.MediaId,
" title from queueItem=", queueItem.Description.Title,
" mediaId from track=", track.Description.MediaId,
" title from track=", track.Description.Title,
" source.hashcode from track=", track.GetString(
MusicProvider.CustomMetadataTrackSource).GetHashCode(),
e);
throw e;
}
LogHelper.Debug(Tag, "Updating metadata for MusicID= " + musicId);
session.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.Description.IconBitmap == null &&
track.Description.IconUri != null)
{
var albumUri = track.Description.IconUri.ToString();
AlbumArtCache.Instance.Fetch(albumUri, new AlbumArtCache.FetchListener {
OnFetched = (artUrl, bitmap, icon) => {
var qItem = playingQueue [currentIndexOnQueue];
var trackItem = musicProvider.GetMusic(trackId);
trackItem = new MediaMetadata.Builder(trackItem)
.PutBitmap(MediaMetadata.MetadataKeyAlbumArt, bitmap)
.PutBitmap(MediaMetadata.MetadataKeyDisplayIcon, icon)
.Build();
musicProvider.UpdateMusic(trackId, trackItem);
// If we are still playing the same music
var currentPlayingId = MediaIDHelper.ExtractMusicIDFromMediaID(
qItem.Description.MediaId);
if (trackId == currentPlayingId)
{
session.SetMetadata(trackItem);
}
}
});
}
}
MediaMetadata GetCurrentPlayingMusic()
{
if (QueueHelper.isIndexPlayable(currentIndexOnQueue, playingQueue))
{
var item = playingQueue [currentIndexOnQueue];
if (item != null)
{
LogHelper.Debug(Tag, "getCurrentPlayingMusic for musicId=",
item.Description.MediaId);
return(musicProvider.GetMusic(
MediaIDHelper.ExtractMusicIDFromMediaID(item.Description.MediaId)));
}
}
return(null);
}
void UpdatePlaybackState(String error)
{
LogHelper.Debug(Tag, "updatePlaybackState, playback state=" + playback.State);
var position = PlaybackState.PlaybackPositionUnknown;
if (playback != null && playback.IsConnected)
{
position = playback.CurrentStreamPosition;
}
var stateBuilder = new PlaybackState.Builder()
.SetActions(GetAvailableActions());
SetCustomAction(stateBuilder);
var state = playback.State;
// 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 = PlaybackStateCode.Error;
}
stateBuilder.SetState(state, position, 1.0f, SystemClock.ElapsedRealtime());
// Set the activeQueueItemId if the current index is valid.
if (QueueHelper.isIndexPlayable(currentIndexOnQueue, playingQueue))
{
var item = playingQueue [currentIndexOnQueue];
stateBuilder.SetActiveQueueItemId(item.QueueId);
}
session.SetPlaybackState(stateBuilder.Build());
if (state == PlaybackStateCode.Playing || state == PlaybackStateCode.Paused)
{
mediaNotificationManager.StartNotification();
}
}
public override void OnCreate()
{
base.OnCreate();
LogHelper.Debug(Tag, "onCreate");
playingQueue = new List <MediaSession.QueueItem> ();
musicProvider = new MusicProvider();
packageValidator = new PackageValidator(this);
session = new MediaSession(this, "MusicService");
SessionToken = session.SessionToken;
var mediaCallback = new MediaSessionCallback();
mediaCallback.OnPlayImpl = () => {
LogHelper.Debug(Tag, "play");
if (playingQueue == null || playingQueue.Count != 0)
{
playingQueue = new List <MediaSession.QueueItem> (QueueHelper.GetRandomQueue(musicProvider));
session.SetQueue(playingQueue);
session.SetQueueTitle(GetString(Resource.String.random_queue_title));
currentIndexOnQueue = 0;
}
if (playingQueue != null && playingQueue.Count != 0)
{
HandlePlayRequest();
}
};
mediaCallback.OnSkipToQueueItemImpl = (id) => {
LogHelper.Debug(Tag, "OnSkipToQueueItem:" + id);
if (playingQueue != null && playingQueue.Count != 0)
{
currentIndexOnQueue = QueueHelper.GetMusicIndexOnQueue(playingQueue, id);
HandlePlayRequest();
}
};
mediaCallback.OnSeekToImpl = (pos) => {
LogHelper.Debug(Tag, "onSeekTo:", pos);
playback.SeekTo((int)pos);
};
mediaCallback.OnPlayFromMediaIdImpl = (mediaId, extras) => {
LogHelper.Debug(Tag, "playFromMediaId mediaId:", mediaId, " extras=", extras);
playingQueue = QueueHelper.GetPlayingQueue(mediaId, musicProvider);
session.SetQueue(playingQueue);
var queueTitle = GetString(Resource.String.browse_musics_by_genre_subtitle,
MediaIDHelper.ExtractBrowseCategoryValueFromMediaID(mediaId));
session.SetQueueTitle(queueTitle);
if (playingQueue != null && playingQueue.Count != 0)
{
currentIndexOnQueue = QueueHelper.GetMusicIndexOnQueue(playingQueue, mediaId);
if (currentIndexOnQueue < 0)
{
LogHelper.Error(Tag, "playFromMediaId: media ID ", mediaId,
" could not be found on queue. Ignoring.");
}
else
{
HandlePlayRequest();
}
}
};
mediaCallback.OnPauseImpl = () => {
LogHelper.Debug(Tag, "pause. current state=" + playback.State);
HandlePauseRequest();
};
mediaCallback.OnStopImpl = () => {
LogHelper.Debug(Tag, "stop. current state=" + playback.State);
HandleStopRequest(null);
};
mediaCallback.OnSkipToNextImpl = () => {
LogHelper.Debug(Tag, "skipToNext");
currentIndexOnQueue++;
if (playingQueue != null && currentIndexOnQueue >= playingQueue.Count)
{
currentIndexOnQueue = 0;
}
if (QueueHelper.isIndexPlayable(currentIndexOnQueue, playingQueue))
{
HandlePlayRequest();
}
else
{
LogHelper.Error(Tag, "skipToNext: cannot skip to next. next Index=" +
currentIndexOnQueue + " queue length=" +
(playingQueue == null ? "null" : playingQueue.Count.ToString()));
HandleStopRequest("Cannot skip");
}
};
mediaCallback.OnSkipToPreviousImpl = () => {
LogHelper.Debug(Tag, "skipToPrevious");
currentIndexOnQueue--;
if (playingQueue != null && currentIndexOnQueue < 0)
{
currentIndexOnQueue = 0;
}
if (QueueHelper.isIndexPlayable(currentIndexOnQueue, playingQueue))
{
HandlePlayRequest();
}
else
{
LogHelper.Error(Tag, "skipToPrevious: cannot skip to previous. previous Index=" +
currentIndexOnQueue + " queue length=" +
(playingQueue == null ? "null" : playingQueue.Count.ToString()));
HandleStopRequest("Cannot skip");
}
};
mediaCallback.OnCustomActionImpl = (action, extras) => {
if (CustomActionThumbsUp == action)
{
LogHelper.Info(Tag, "onCustomAction: favorite for current track");
var track = GetCurrentPlayingMusic();
if (track != null)
{
var musicId = track.GetString(MediaMetadata.MetadataKeyMediaId);
musicProvider.SetFavorite(musicId, !musicProvider.IsFavorite(musicId));
}
UpdatePlaybackState(null);
}
else
{
LogHelper.Error(Tag, "Unsupported action: ", action);
}
};
mediaCallback.OnPlayFromSearchImpl = (query, extras) => {
LogHelper.Debug(Tag, "playFromSearch query=", query);
if (string.IsNullOrEmpty(query))
{
playingQueue = new List <MediaSession.QueueItem> (QueueHelper.GetRandomQueue(musicProvider));
}
else
{
playingQueue = new List <MediaSession.QueueItem> (QueueHelper.GetPlayingQueueFromSearch(query, musicProvider));
}
LogHelper.Debug(Tag, "playFromSearch playqueue.length=" + playingQueue.Count);
session.SetQueue(playingQueue);
if (playingQueue != null && playingQueue.Count != 0)
{
currentIndexOnQueue = 0;
HandlePlayRequest();
}
else
{
HandleStopRequest(GetString(Resource.String.no_search_results));
}
};
session.SetCallback(mediaCallback);
session.SetFlags(MediaSessionFlags.HandlesMediaButtons |
MediaSessionFlags.HandlesTransportControls);
playback = new Playback(this, musicProvider);
playback.State = PlaybackStateCode.None;
playback.Callback = this;
playback.Start();
var context = ApplicationContext;
var intent = new Intent(context, typeof(MusicPlayerActivity));
var pi = PendingIntent.GetActivity(context, 99 /*request code*/,
intent, PendingIntentFlags.UpdateCurrent);
session.SetSessionActivity(pi);
var extraBundle = new Bundle();
CarHelper.SetSlotReservationFlags(extraBundle, true, true, true);
session.SetExtras(extraBundle);
UpdatePlaybackState(null);
mediaNotificationManager = new MediaNotificationManager(this);
}