如何使用 exoplayer ConcatenatingMediaSource 在按下按钮时连续播放 5 个视频

Question

我正在尝试在单击按钮时实现 exoplayer 将播放连接列表中的下一个视频 但它只播放第一个视频而不播放其他四个我做错了什么

next_button.setOnClickListener(v ->
        {
            releasePlayer();
            DefaultDataSourceFactory defaultDataSourceFactory = new DefaultDataSourceFactory(this, userAgent);
            MediaSource firstSource =
                    new HlsMediaSource.Factory(defaultDataSourceFactory).createMediaSource(MediaItem.fromUri(firstVideoUri));
            MediaSource secondSource =
                    new HlsMediaSource.Factory(defaultDataSourceFactory).createMediaSource(MediaItem.fromUri(secondVideoUri));
            MediaSource third =
                    new HlsMediaSource.Factory(defaultDataSourceFactory).createMediaSource(MediaItem.fromUri(third_url));
            MediaSource fourth =
                    new HlsMediaSource.Factory(defaultDataSourceFactory).createMediaSource(MediaItem.fromUri(fourth_url));
            ConcatenatingMediaSource concatenatedSource =
                    new ConcatenatingMediaSource(firstSource, secondSource, third, fourth);
            initializePlayer_concate(concatenatedSource);
        });

添加我的 initilizeplayer 方法

    void initializePlayer_concate(MediaSource concatenatedSource) {
    ExoTrackSelection.Factory videoTrackSelectionFactory = new AdaptiveTrackSelection.Factory();
    trackSelector = new DefaultTrackSelector(Player.this, videoTrackSelectionFactory);
    DefaultRenderersFactory renderersFactory = new DefaultRenderersFactory(this);
    renderersFactory.setExtensionRendererMode(DefaultRenderersFactory.EXTENSION_RENDERER_MODE_PREFER);
    simpleExoPlayer = new SimpleExoPlayer.Builder(this, renderersFactory).setTrackSelector(trackSelector).setSeekForwardIncrementMs(10000).setSeekBackIncrementMs(10000).build();
    playerView.setPlayer(simpleExoPlayer);
    simpleExoPlayer.setMediaSource(concatenatedSource);
    playerView.setKeepScreenOn(true);
    simpleExoPlayer.prepare();
    simpleExoPlayer.setPlayWhenReady(true);


}

如果有人告诉我我做错了什么就好了