Android ExoPlayer可以'；t播放HLS（HTTP实时流媒体）

我想使用ExoPlayer来播放HLS（HTTP直播）。 但我得到了以下错误：

E/ExoPlayerImplInternal:源错误。 com.google.android.exoplayer2.upstream.HttpDataSource$HttpDataSource异常：无法连接到https://my_url/file.m3u8

下面是我的设置代码：

private fun playTest() {
        player = ExoPlayerFactory.newSimpleInstance(
            DefaultRenderersFactory(this.requireContext()), DefaultTrackSelector(), DefaultLoadControl())
        val uri = Uri.parse("https://my_url/file.m3u8")

        ep_video_view.player = player

        val dataSourceFactory = DefaultDataSourceFactory(this.requireContext(), "user-agent")
        val mediaSource = HlsMediaSource(uri, dataSourceFactory, handler, null)

        player?.prepare(mediaSource)
        player?.playWhenReady = true
    }

提前感谢您。

在java中

   TrackSelection.Factory adaptiveTrackSelection = new AdaptiveTrackSelection.Factory(new DefaultBandwidthMeter());
    player = ExoPlayerFactory.newSimpleInstance(
            new DefaultRenderersFactory(mContext),
            new DefaultTrackSelector(adaptiveTrackSelection),
            new DefaultLoadControl());

    playerView.setPlayer(player);
    DefaultBandwidthMeter defaultBandwidthMeter = new DefaultBandwidthMeter();
    DataSource.Factory dataSourceFactory = new DefaultDataSourceFactory(mContext,
            Util.getUserAgent(mContext, "Exo2"), defaultBandwidthMeter);

    String hls_url = "YOUR STREAMING URL HERE";
    Uri uri = Uri.parse(hls_url);
    Handler mainHandler = new Handler();
    MediaSource mediaSource = new HlsMediaSource(uri,
            dataSourceFactory, mainHandler, null);
    player.prepare(mediaSource);
    player.setPlayWhenReady(true);

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