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);
}
}
});
}
}
void LoadChildrenImpl(string parentId, Result result)
{
LogHelper.Debug(Tag, "OnLoadChildren: parentMediaId=", parentId);
var mediaItems = new JavaList <MediaBrowser.MediaItem> ();
if (MediaIDHelper.MediaIdRoot == parentId)
{
LogHelper.Debug(Tag, "OnLoadChildren.ROOT");
mediaItems.Add(new MediaBrowser.MediaItem(
new MediaDescription.Builder()
.SetMediaId(MediaIDHelper.MediaIdMusicsByGenre)
.SetTitle(GetString(Resource.String.browse_genres))
.SetIconUri(Android.Net.Uri.Parse("android.resource://" +
"com.example.android.mediabrowserservice/drawable/ic_by_genre"))
.SetSubtitle(GetString(Resource.String.browse_genre_subtitle))
.Build(), MediaItemFlags.Browsable
));
}
else if (MediaIDHelper.MediaIdMusicsByGenre == parentId)
{
LogHelper.Debug(Tag, "OnLoadChildren.GENRES");
foreach (var genre in musicProvider.Genres)
{
var item = new MediaBrowser.MediaItem(
new MediaDescription.Builder()
.SetMediaId(MediaIDHelper.CreateBrowseCategoryMediaID(MediaIDHelper.MediaIdMusicsByGenre, genre))
.SetTitle(genre)
.SetSubtitle(GetString(Resource.String.browse_musics_by_genre_subtitle, genre))
.Build(), MediaItemFlags.Browsable
);
mediaItems.Add(item);
}
}
else if (parentId.StartsWith(MediaIDHelper.MediaIdMusicsByGenre))
{
var genre = MediaIDHelper.GetHierarchy(parentId) [1];
LogHelper.Debug(Tag, "OnLoadChildren.SONGS_BY_GENRE genre=", genre);
foreach (var track in musicProvider.GetMusicsByGenre(genre))
{
var hierarchyAwareMediaID = MediaIDHelper.CreateMediaID(
track.Description.MediaId, MediaIDHelper.MediaIdMusicsByGenre, genre);
var trackCopy = new MediaMetadata.Builder(track)
.PutString(MediaMetadata.MetadataKeyMediaId, hierarchyAwareMediaID)
.Build();
var bItem = new MediaBrowser.MediaItem(
trackCopy.Description, MediaItemFlags.Playable);
mediaItems.Add(bItem);
}
}
else
{
LogHelper.Warn(Tag, "Skipping unmatched parentMediaId: ", parentId);
}
LogHelper.Debug(Tag, "OnLoadChildren sending ", mediaItems.Count,
" results for ", parentId);
result.SendResult(mediaItems);
}
public void Play(MediaSession.QueueItem item)
{
playOnFocusGain = true;
TryToGetAudioFocus();
RegisterAudioNoisyReceiver();
string mediaId = item.Description.MediaId;
bool mediaHasChanged = mediaId != currentMediaId;
if (mediaHasChanged)
{
currentPosition = 0;
currentMediaId = mediaId;
}
if (State == PlaybackStateCode.Paused && !mediaHasChanged && mediaPlayer != null)
{
ConfigMediaPlayerState();
}
else
{
State = PlaybackStateCode.Stopped;
RelaxResources(false);
MediaMetadata track = musicProvider.GetMusic(
MediaIDHelper.ExtractMusicIDFromMediaID(item.Description.MediaId));
string source = track.GetString(MusicProvider.CustomMetadataTrackSource);
try {
CreateMediaPlayerIfNeeded();
State = PlaybackStateCode.Buffering;
mediaPlayer.SetAudioStreamType(Android.Media.Stream.Music);
mediaPlayer.SetDataSource(source);
mediaPlayer.PrepareAsync();
wifiLock.Acquire();
if (Callback != null)
{
Callback.OnPlaybackStatusChanged(State);
}
} catch (IOException ex) {
LogHelper.Error(Tag, ex, "Exception playing song");
if (Callback != null)
{
Callback.OnError(ex.Message);
}
}
}
}
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);
}
static List <MediaSession.QueueItem> ConvertToQueue(IEnumerable <MediaMetadata> tracks, params string[] categories)
{
var queue = new List <MediaSession.QueueItem>();
int count = 0;
foreach (var track in tracks)
{
string hierarchyAwareMediaID = MediaIDHelper.CreateMediaID(track.Description.MediaId, categories);
MediaMetadata trackCopy = new MediaMetadata.Builder(track)
.PutString(MediaMetadata.MetadataKeyMediaId, hierarchyAwareMediaID)
.Build();
var item = new MediaSession.QueueItem(trackCopy.Description, count++);
queue.Add(item);
}
return(queue);
}
public static List <MediaSession.QueueItem> GetPlayingQueue(string mediaId,
MusicProvider musicProvider)
{
// extract the browsing hierarchy from the media ID:
var hierarchy = MediaIDHelper.GetHierarchy(mediaId);
if (hierarchy.Length != 2)
{
LogHelper.Error(Tag, "Could not build a playing queue for this mediaId: ", mediaId);
return(null);
}
var categoryType = hierarchy[0];
var categoryValue = hierarchy[1];
LogHelper.Debug(Tag, "Creating playing queue for ", categoryType, ", ", categoryValue);
IEnumerable <MediaMetadata> tracks = null;
// This sample only supports genre and by_search category types.
if (categoryType == MediaIDHelper.MediaIdMusicsByGenre)
{
tracks = musicProvider.GetMusicsByGenre(categoryValue);
}
else if (categoryType == MediaIDHelper.MediaIdMusicsBySearch)
{
tracks = musicProvider.SearchMusic(categoryValue);
}
if (tracks == null)
{
LogHelper.Error(Tag, "Unrecognized category type: ", categoryType, " for mediaId ", mediaId);
return(null);
}
return(ConvertToQueue(tracks, hierarchy[0], hierarchy[1]));
}
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);
}
