ExoPlayer 2 Playlist Listener

So I am in a similar scenario and need to know when the next video in the playlist starts. I found that the ExoPlayer.EventListener has a method called onPositionDiscontinuity() that gets called every time the video changes or "seeks" to the next in the playlist.

I haven't played around with this method extensively, but from what I can see so far, this is the method that you should be concerned about. There are no parameters that get passed when the method is fired, so you'll have to keep some kind of counter or queue to keep track of whats being played at any given moment.

Hopefully this helps!

Edit: change in index returned by Exoplayer.getCurrentWindowIndex() is the recommended way to detect item change in a playlist MediaSource.

int lastWindowIndex = 0; // global var in your class encapsulating exoplayer obj (Activity, etc.)exoPlayer.addListener(new ExoPlayer.EventListener() {        @Override        public void onLoadingChanged(boolean isLoading) {        }        @Override        public void onPlayerStateChanged(boolean playWhenReady, int playbackState) {        }        @Override        public void onTimelineChanged(Timeline timeline, Object manifest) {        }        @Override        public void onPlayerError(ExoPlaybackException error) {        }        @Override        public void onPositionDiscontinuity() {            //THIS METHOD GETS CALLED FOR EVERY NEW SOURCE THAT IS PLAYED            int latestWindowIndex = exoPlayer.getCurrentWindowIndex();            if (latestWindowIndex != lastWindowIndex) {                // item selected in playlist has changed, handle here                lastWindowIndex = latestWindowIndex;                // ...            }        }    });

You can implement the following event and update your ui according to the player's state.

 mExoPlayer.addListener(new ExoPlayer.Listener() {            @Override            public void onPlayerStateChanged(boolean playWhenReady, int playbackState) {                if (playbackState == PlaybackStateCompat.STATE_PLAYING) {                    //do something                                 }            }            @Override            public void onPlayWhenReadyCommitted() {            }            @Override            public void onPlayerError(ExoPlaybackException error) {                mExoPlayer.stop();            }        });

Since the answer here did not work for me, I will add my working solution in Kotlin.And also there are lots of methods deprecated since then.

You can track the current track(video) by setting a mediaId when creating your playlist

Gradle:

implementation 'com.google.android.exoplayer:exoplayer:2.14.1'

Layout xml:

<com.google.android.exoplayer2.ui.PlayerView    android:id="@+id/player_view"    android:layout_width="match_parent"    android:layout_height="100dp"    app:show_buffering="when_playing"/>

Code:

private lateinit var exoPlayer: SimpleExoPlayerprivate lateinit var playerView: PlayerViewprivate lateinit var fileList: List<FileModel>private fun initPlayer() {    playerView = findViewById(R.id.player_view)    playerView.controllerShowTimeoutMs = 0    playerView.cameraDistance = 30F    exoPlayer = SimpleExoPlayer.Builder(this).build()    playerView.player = exoPlayer    setPlaylist()    exoPlayer.prepare()    exoPlayer.seekTo(position, C.TIME_UNSET) // position = current song or video    exoPlayer.playWhenReady = true    addPlayerListeners()}private fun setPlaylist() {    for ((pos, file) in fileList.withIndex()) {        val mediaItem = MediaItem.Builder().setUri(file.url).setMediaId(pos.toString()).build()        exoPlayer.addMediaItem(mediaItem)    }}private fun addPlayerListeners() {    exoPlayer.addListener(object : Player.Listener{        override fun onMediaItemTransition(mediaItem: MediaItem?, reason: Int) {            super.onMediaItemTransition(mediaItem, reason)            val  item = mediaItem?.mediaMetadata            val bmp = item?.artworkData            Log.i(TAG, "position = ${mediaItem?.mediaId}")            val currentPos = mediaItem?.mediaId            updateViews(currentPos, bmp)        }    })}private fun updateViews(currentPos: String?, bmp: ByteArray?) {    position = currentPos?.toInt() ?: 0    val title = fileList[position].title    textview_title.text = title    if (bmp == null) {        image_view.setImageResource(R.drawable.exo_ic_default_album_image)        return    }    val bitmap = BitmapFactory.decodeByteArray(bmp, 0, bmp.size)    image_view.setImageBitmap(bitmap)}