import android.support.v4.media.session.MediaSessionCompat;

   private MediaSessionCompat mMediaSession;
    //init mediasesson
    mMediaSession = new MediaSessionCompat(getApplicationContext(),"AudioPlayer",new ComponentName(this,HeadsetNotificationBroadcast.class),null);
    //set the Metadata
    mMediaSession.setMetadata(new MediaMetadataCompat.Builder()
                    .putBitmap(MediaMetadataCompat.MetaDATA_KEY_ALBUM_ART,getSongDataHelper().getAlbumArt())
                    .putString(MediaMetadataCompat.MetaDATA_KEY_ARTIST,getSongDataHelper().getArtist())
                    .putString(MediaMetadataCompat.MetaDATA_KEY_ALBUM,getSongDataHelper().getAlbum())
                    .putString(MediaMetadataCompat.MetaDATA_KEY_TITLE,getSongDataHelper().getTitle())
                    .build());