Exoplayer从一开始就播放新的播放列表，而不是提供位置

Question

我在我的项目中实现了DynamicConcatenatingMediaSource并且遇到了一个错误，在方法exoPlayer.prepare(source);中，在调用exoPlayer.seekTo(currentPosition, C.TIME_UNSET);之前，歌曲开始在播放列表的开头播放。 所以这会导致我的应用程序出现UI错误。

对于已经缓存的歌曲，用户可以在转到下一首歌曲之前听到第一首歌曲。

我从这里播放一首歌并比较它是否是一个新列表，我重新初始化exoplayer。

  private BroadcastReceiver playNewAudio = new BroadcastReceiver() {
    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    @Override
    public void onReceive(Context context, Intent intent) {

        if (exoPlayer != null) {
            try {
                if (!exoPlayer.getPlayWhenReady()) {
                    resumeMedia();
                    sendBroadcast(Dispatcher.Broadcast.NEW_TRACK_PLAYING, "");
                    return;
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        //Get the new media index form SharedPreferences
        if (songManager.currentPosition != -1 && songManager.currentPosition < songManager.getCurrentPlayList().size()) {
            //index is in a valid range
            songManager.activeTrack = songManager.getCurrentPlayList().get(songManager.currentPosition);
            //sendBroadcast(Dispatcher.Broadcast.NEW_TRACK_PLAYING,"");
            if (songManager.getPreviousPlaylist().equals(songManager.currentPlayList))

                seekToCurrent(songManager.currentPosition);

            else
                initExo();
        } else {
            stopSelf();
        }

        /*stopMedia();*/
        if (exoPlayer != null) {
            try {
                exoPlayer.setPlayWhenReady(shouldAutoPlay);
            } catch (Exception e) {
                e.printStackTrace();
            }
        } else {
            initExo();
        }
        /*initMediaPlayer();*/
        updateMetaData();
        buildNotification(PlaybackStatus.PLAYING);

    }
};

这是我初始化Exo

的地方

  private void initExo() {
    songManager = SongManager.getInstance();
    int currentPosition = songManager.getCurrentPosition();
    window = new Timeline.Window();
    defaultBandwidthMeter = new DefaultBandwidthMeter();
    LoadControl loadControl = new DefaultLoadControl();

    trackSelectionFactory = new AdaptiveTrackSelection.Factory(defaultBandwidthMeter);

    trackSelector = new DefaultTrackSelector(trackSelectionFactory);

    boolean newExo = exoPlayer == null;

    if (newExo)
        exoPlayer = ExoPlayerFactory.newSimpleInstance(this, trackSelector, loadControl);

    exoPlayer.addListener(this);
    source = initMediaSource();
    exoPlayer.prepare(source);
    exoPlayer.seekTo(currentPosition, C.TIME_UNSET);
    exoPlayer.setPlayWhenReady(true);


}

然后调用initMediaSource

    private DynamicConcatenatingMediaSource initMediaSource() {
    clearSource();
    DynamicConcatenatingMediaSource mediaSource = new DynamicConcatenatingMediaSource();
    for (Track track : songManager.getCurrentPlayList()) {
        if (track != null && !track.getSource().isEmpty()) {
            HlsMediaSource source = new
                    HlsMediaSource(Uri.parse(track.getSource()), cacheDataSourceFactory(), 5,   null, null);
            mediaSource.addMediaSource(source);
        } else {
            Log.e("Bad_Track", track.toString());
        }
    }
    songManager.setPreviousPlaylist(songManager.currentPlayList);
    return mediaSource;
}

这在同一个播放列表中工作正常。 我能够找到这个问题，因为我在该行添加了断点，并在我离开onPrepared方法时注意到音乐开始播放。