HLS

ExoPlayer 支持采用多种容器格式的 HLS。所含音频和视频样本格式也必须受支持（有关详情，请参阅样本格式部分）。我们强烈建议 HLS 内容制作方生成高质量的 HLS 流，如这篇博文中所述。

功能	支持	评论
容器
MPEG-TS	是
FMP4/CMAF	是
ADTS (AAC)	是
MP3	是
字幕
CEA-608	是
CEA-708	是
WebVTT	是
元数据
ID3	是
SCTE-35	否
内容保护
AES-128	是
Sample AES-128	否
Widevine	是	API 19 及更高版本（“cenc”方案）和 25 及更高版本（“cbcs”方案）
PlayReady SL2000	是	仅分发至 Android TV
服务器控制
增量更新	是
阻止播放列表重新加载	是
阻止加载预加载提示	是	长度未定义的字节范围除外
广告插播
服务器引导的广告插播（插页式广告）	部分支持	仅限包含 `X-ASSET-URI` 的 VOD。直播和`X-ASSET-LIST`将在稍后添加。
IMA 服务器端广告和客户端广告	是	广告插播指南
直播
常规直播播放	是
低延迟 HLS (Apple)	是
低延迟 HLS（社区）	否
通用媒体客户端数据 CMCD	是	CMCD 集成指南

使用 MediaItem

如需播放 HLS 直播，您需要依赖于 HLS 模块。

Kotlin

implementation("androidx.media3:media3-exoplayer-hls:1.9.2")

Groovy

implementation "androidx.media3:media3-exoplayer-hls:1.9.2"

然后，您可以为 HLS 播放列表 URI 创建一个 MediaItem 并将其传递给播放器。

Kotlin

// Create a player instance.
val player = ExoPlayer.Builder(context).build()
// Set the media item to be played.
player.setMediaItem(MediaItem.fromUri(hlsUri))
// Prepare the player.
player.prepare()Hls.kt

Java

// Create a player instance.
ExoPlayer player = new ExoPlayer.Builder(context).build();
// Set the media item to be played.
player.setMediaItem(MediaItem.fromUri(hlsUri));
// Prepare the player.
player.prepare();Hls.java

如果您的 URI 不以 .m3u8 结尾，您可以将 MimeTypes.APPLICATION_M3U8 传递给 MediaItem.Builder 的 setMimeType，以明确指示内容类型。

媒体项的 URI 可以指向媒体播放列表，也可以指向多变体播放列表。如果 URI 指向声明了多个 #EXT-X-STREAM-INF 标记的多变体播放列表，则 ExoPlayer 会自动在变体之间进行调整，同时考虑可用带宽和设备功能。

使用 HlsMediaSource

如需更多自定义选项，您可以创建 HlsMediaSource 并将其直接传递给播放器，而不是传递 MediaItem。

Kotlin

// Create a data source factory.
val dataSourceFactory: DataSource.Factory = DefaultHttpDataSource.Factory()
// Create a HLS media source pointing to a playlist uri.
val hlsMediaSource =
  HlsMediaSource.Factory(dataSourceFactory).createMediaSource(MediaItem.fromUri(hlsUri))
// Create a player instance.
val player = ExoPlayer.Builder(context).build()
// Set the HLS media source as the playlist with a single media item.
player.setMediaSource(hlsMediaSource)
// Prepare the player.
player.prepare()Hls.kt

Java

// Create a data source factory.
DataSource.Factory dataSourceFactory = new DefaultHttpDataSource.Factory();
// Create a HLS media source pointing to a playlist uri.
HlsMediaSource hlsMediaSource =
    new HlsMediaSource.Factory(dataSourceFactory).createMediaSource(MediaItem.fromUri(hlsUri));
// Create a player instance.
ExoPlayer player = new ExoPlayer.Builder(context).build();
// Set the HLS media source as the playlist with a single media item.
player.setMediaSource(hlsMediaSource);
// Prepare the player.
player.prepare();Hls.java

访问清单

您可以通过调用 Player.getCurrentManifest 来检索当前清单。对于 HLS，您应将返回的对象转换为 HlsManifest。每当加载清单时，系统也会调用 Player.Listener 的 onTimelineChanged 回调。对于点播内容，这种情况只会发生一次；对于直播内容，这种情况可能会发生多次。以下代码段展示了应用如何在每次加载清单时执行某些操作。

Kotlin

player.addListener(
  object : Player.Listener {
    override fun onTimelineChanged(
      timeline: Timeline,
      @Player.TimelineChangeReason reason: Int,
    ) {
      val manifest = player.currentManifest
      if (manifest is HlsManifest) {
        // Do something with the manifest.
      }
    }
  }
)Hls.kt

Java

player.addListener(
    new Player.Listener() {
      @Override
      public void onTimelineChanged(
          Timeline timeline, @Player.TimelineChangeReason int reason) {
        Object manifest = player.getCurrentManifest();
        if (manifest != null) {
          HlsManifest hlsManifest = (HlsManifest) manifest;
          // Do something with the manifest.
        }
      }
    });Hls.java

播放包含插页式广告的 HLS 流

HLS 规范定义了 HLS 插播广告，可用于在媒体播放列表中添加插播广告信息。ExoPlayer 默认会忽略这些插播广告。您可以使用 HlsInterstitialsAdsLoader 添加支持。我们不会从一开始就支持规范的所有功能。如果您发现自己的直播缺少支持，请在 GitHub 上提交问题并向我们发送您的直播 URI，以便我们为您的直播添加支持。

将 `MediaItem` 与 Playlist API 搭配使用

使用插播广告播放 HLS 直播的最便捷方式是使用 HlsInterstitialsAdsLoader.AdsMediaSourceFactory 构建 ExoPlayer 实例。这样一来，便可以使用 Player 接口基于 MediaItem 的播放列表 API 来播放 HLS 插播广告。

构建播放器实例时，可以将 ExoPlayer 的 MediaSource.Factory 注入到构建器中：

Kotlin

val hlsInterstitialsAdsLoader = HlsInterstitialsAdsLoader(context)
// Create a MediaSource.Factory for HLS streams with interstitials.
val hlsMediaSourceFactory =
  HlsInterstitialsAdsLoader.AdsMediaSourceFactory(
    hlsInterstitialsAdsLoader,
    playerView,
    DefaultMediaSourceFactory(context),
  )

// Build player with interstitials media source factory
val player = ExoPlayer.Builder(context).setMediaSourceFactory(hlsMediaSourceFactory).build()

// Set the player on the ads loader.
hlsInterstitialsAdsLoader.setPlayer(player)
playerView.setPlayer(player)Hls.kt

Java

HlsInterstitialsAdsLoader hlsInterstitialsAdsLoader = new HlsInterstitialsAdsLoader(context);
// Create a MediaSource.Factory for HLS streams with interstitials.
MediaSource.Factory hlsMediaSourceFactory =
    new HlsInterstitialsAdsLoader.AdsMediaSourceFactory(
        hlsInterstitialsAdsLoader, playerView, new DefaultMediaSourceFactory(context));

// Build player with interstitials media source factory
ExoPlayer player =
    new ExoPlayer.Builder(context).setMediaSourceFactory(hlsMediaSourceFactory).build();

// Set the player on the ads loader.
hlsInterstitialsAdsLoader.setPlayer(player);
playerView.setPlayer(player);Hls.java

通过这种播放器设置，播放 HLS 插页式广告只需在播放器上设置一个带有 AdsConfiguration 的媒体项：

Kotlin

// Build an HLS media item with ads configuration to be played.
player.setMediaItem(
  MediaItem.Builder()
    .setUri("https://www.example.com/media.m3u8")
    .setAdsConfiguration(
      MediaItem.AdsConfiguration.Builder("hls://interstitials".toUri())
        .setAdsId("ad-tag-0") // must be unique within playlist
        .build()
    )
    .build()
)

player.prepare()
player.play()Hls.kt

Java

// Build an HLS media item with ads configuration to be played.
player.setMediaItem(
    new MediaItem.Builder()
        .setUri("https://www.example.com/media.m3u8")
        .setAdsConfiguration(
            new AdsConfiguration.Builder(Uri.parse("hls://interstitials"))
                .setAdsId("ad-tag-0") // must be unique within playlist
                .build())
        .build());
player.prepare();
player.play();Hls.java

使用基于媒体源的 API

或者，也可以在不替换默认媒体源工厂的情况下构建 ExoPlayer 实例。为了支持插页式广告，应用随后可以使用 HlsInterstitialsAdsLoader.AdsMediaSourceFactory 直接创建 MediaSource，并使用基于媒体源的播放列表 API 将其提供给 ExoPlayer：

Kotlin

val hlsInterstitialsAdsLoader = HlsInterstitialsAdsLoader(context)
// Create a MediaSource.Factory for HLS streams with interstitials.
val hlsMediaSourceFactory =
  HlsInterstitialsAdsLoader.AdsMediaSourceFactory(
    hlsInterstitialsAdsLoader,
    playerView,
    context,
  )

// Build player with default media source factory.
val player = ExoPlayer.Builder(context).build()

// Create an media source from an HLS media item with ads configuration.
val mediaSource =
  hlsMediaSourceFactory.createMediaSource(
    MediaItem.Builder()
      .setUri("https://www.example.com/media.m3u8")
      .setAdsConfiguration(
        MediaItem.AdsConfiguration.Builder("hls://interstitials".toUri())
          .setAdsId("ad-tag-0")
          .build()
      )
      .build()
  )

// Set the media source on the player.
player.setMediaSource(mediaSource)
player.prepare()
player.play()Hls.kt

Java

HlsInterstitialsAdsLoader hlsInterstitialsAdsLoader = new HlsInterstitialsAdsLoader(context);
// Create a MediaSource.Factory for HLS streams with interstitials.
MediaSource.Factory hlsMediaSourceFactory =
    new HlsInterstitialsAdsLoader.AdsMediaSourceFactory(
        hlsInterstitialsAdsLoader, playerView, context);

// Build player with default media source factory.
ExoPlayer player = new ExoPlayer.Builder(context).build();

// Create an media source from an HLS media item with ads configuration.
MediaSource mediaSource =
    hlsMediaSourceFactory.createMediaSource(
        new MediaItem.Builder()
            .setUri("https://www.example.com/media.m3u8")
            .setAdsConfiguration(
                new MediaItem.AdsConfiguration.Builder(Uri.parse("hls://interstitials"))
                    .setAdsId("ad-tag-0")
                    .build())
            .build());

// Set the media source on the player.
player.setMediaSource(mediaSource);
player.prepare();
player.play();Hls.java

监听广告事件

可以将 Listener 添加到 HlsInterstitialsAdsLoader，以监控与 HLS 插播广告播放相关的状态更改事件。这可让应用或 SDK 跟踪已播放的广告、正在加载的素材资源列表、正在准备的广告媒体来源，或检测素材资源列表加载和广告准备错误。此外，还可以接收广告媒体来源发出的元数据，以进行精细的广告播放验证或跟踪广告播放进度。

Kotlin

class AdsLoaderListener : HlsInterstitialsAdsLoader.Listener {

  override fun onStart(mediaItem: MediaItem, adsId: Any, adViewProvider: AdViewProvider) {
    // Do something when HLS media item with interstitials is started.
  }

  override fun onMetadata(
    mediaItem: MediaItem,
    adsId: Any,
    adGroupIndex: Int,
    adIndexInAdGroup: Int,
    metadata: Metadata,
  ) {
    // Do something with metadata that is emitted by the ad media source of the given ad.
  }

  override fun onAdCompleted(
    mediaItem: MediaItem,
    adsId: Any,
    adGroupIndex: Int,
    adIndexInAdGroup: Int,
  ) {
    // Do something when ad completed playback.
  }

  // ... See JavaDoc for further callbacks of HlsInterstitialsAdsLoader.Listener.

  override fun onStop(mediaItem: MediaItem, adsId: Any, adPlaybackState: AdPlaybackState) {
    // Do something with the resulting ad playback state when stopped.
  }
}
Hls.kt

Java

@OptIn(markerClass = UnstableApi.class)
private static class AdsLoaderListener implements HlsInterstitialsAdsLoader.Listener {

  // implement HlsInterstitialsAdsLoader.Listener
  @Override
  public void onStart(MediaItem mediaItem, Object adsId, AdViewProvider adViewProvider) {
    // Do something when HLS media item with interstitials is started.
  }

  @Override
  public void onMetadata(
      MediaItem mediaItem,
      Object adsId,
      int adGroupIndex,
      int adIndexInAdGroup,
      Metadata metadata) {
    // Do something with metadata that is emitted by the ad media source of the given ad.
  }

  @Override
  public void onAdCompleted(
      MediaItem mediaItem, Object adsId, int adGroupIndex, int adIndexInAdGroup) {
    // Do something when ad completed playback.
  }

  // ... See JavaDoc for further callbacks

  @Override
  public void onStop(MediaItem mediaItem, Object adsId, AdPlaybackState adPlaybackState) {
    // Do something with the resulting ad playback state when stopped.
  }
}
Hls.java

如需查看所有可用回调的详细文档，请参阅 HlsInterstitialsAdsLoader.Listener 的 JavaDoc。

然后，可以将监听器添加到广告加载器：

Kotlin

val listener = AdsLoaderListener()
// Add the listener to the ads loader to receive ad loader events.
hlsInterstitialsAdsLoader.addListener(listener)Hls.kt

Java

AdsLoaderListener listener = new AdsLoaderListener();
// Add the listener to the ads loader to receive ad loader events.
hlsInterstitialsAdsLoader.addListener(listener);Hls.java

`HlsInterstitialsAdsLoader` lifecycle

HlsInterstitialsAdsLoader 或 HlsInterstitialsAdsLoader.AdsMediaSourceFactory 的实例可重复用于多个播放器实例，这些实例会创建多个媒体源，必须为这些媒体源加载广告。

例如，可以在 Activity 的 onCreate 方法中创建一个实例，然后将其重复用于多个播放器实例。只要同时只有一个播放器实例在使用它，它就可以正常工作。当应用进入后台时，播放器实例会被销毁，然后当应用再次进入前台时，会创建一个新实例，这对于常见的使用情形非常有用。

通过广告播放状态继续播放

为避免用户必须重新观看广告，可以在重新创建播放器时保存并恢复广告播放状态。具体方法是，在即将释放播放器时调用 getAdsResumptionStates()，并存储返回的 AdsResumptionState 对象。当播放器重新创建时，可以通过对广告加载器实例调用 addAdResumptionState() 来恢复状态。AdsResumptionState 可打包，因此可以存储在 Activity 的 onSaveInstanceState bundle 中。请注意，广告恢复功能仅适用于 VOD 流

Kotlin

class HlsInterstitialsActivity : Activity() {

  companion object {
    const val ADS_RESUMPTION_STATE_KEY = "ads_resumption_state"
  }

  private var hlsInterstitialsAdsLoader: HlsInterstitialsAdsLoader? = null
  private var playerView: PlayerView? = null
  private var player: ExoPlayer? = null
  private var adsResumptionStates: List<HlsInterstitialsAdsLoader.AdsResumptionState>? = null

  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    // Create the ads loader instance.
    hlsInterstitialsAdsLoader = HlsInterstitialsAdsLoader(this)
    // Restore ad resumption states.
    savedInstanceState?.getParcelableArrayList<Bundle>(ADS_RESUMPTION_STATE_KEY)?.let { bundles ->
      adsResumptionStates =
        bundles.map { HlsInterstitialsAdsLoader.AdsResumptionState.fromBundle(it) }
    }
  }

  override fun onStart() {
    super.onStart()
    // Build a player and set it on the ads loader.
    initializePlayer()
    hlsInterstitialsAdsLoader?.setPlayer(player)
    // Add any stored ad resumption states to the ads loader.
    adsResumptionStates?.forEach { hlsInterstitialsAdsLoader?.addAdResumptionState(it) }
    adsResumptionStates = null // Consume the states
  }

  override fun onStop() {
    super.onStop()
    // Get ad resumption states.
    adsResumptionStates = hlsInterstitialsAdsLoader?.adsResumptionStates
    releasePlayer()
  }

  override fun onDestroy() {
    // Release the ads loader when not used anymore.
    hlsInterstitialsAdsLoader?.release()
    hlsInterstitialsAdsLoader = null
    super.onDestroy()
  }

  override fun onSaveInstanceState(outState: Bundle) {
    super.onSaveInstanceState(outState)
    // Store the ad resumption states.
    adsResumptionStates?.let {
      outState.putParcelableArrayList(
        ADS_RESUMPTION_STATE_KEY,
        ArrayList(it.map(HlsInterstitialsAdsLoader.AdsResumptionState::toBundle)),
      )
    }
  }

  fun initializePlayer() {
    if (player == null) {
      // Create a media source factory for HLS streams.
      val hlsMediaSourceFactory =
        HlsInterstitialsAdsLoader.AdsMediaSourceFactory(
          checkNotNull(hlsInterstitialsAdsLoader),
          playerView!!,
          /* context= */ this,
        )
      // Build player with interstitials media source
      player =
        ExoPlayer.Builder(/* context= */ this)
          .setMediaSourceFactory(hlsMediaSourceFactory)
          .build()
      // Set the player on the ads loader.
      hlsInterstitialsAdsLoader?.setPlayer(player)
      playerView?.player = player
    }

    // Use a media item with an HLS stream URI, an ad tag URI and ads ID.
    player?.setMediaItem(
      MediaItem.Builder()
        .setUri("https://www.example.com/media.m3u8")
        .setMimeType(MimeTypes.APPLICATION_M3U8)
        .setAdsConfiguration(
          MediaItem.AdsConfiguration.Builder("hls://interstitials".toUri())
            .setAdsId("ad-tag-0") // must be unique within ExoPlayer playlist
            .build()
        )
        .build()
    )
    player?.prepare()
    player?.play()
  }

  fun releasePlayer() {
    player?.release()
    player = null
    hlsInterstitialsAdsLoader?.setPlayer(null)
    playerView?.player = null
  }
}Hls.kt

Java

@OptIn(markerClass = UnstableApi.class)
public static class HlsInterstitialsActivity extends Activity {

  public static final String ADS_RESUMPTION_STATE_KEY = "ads_resumption_state";

  @Nullable private HlsInterstitialsAdsLoader hlsInterstitialsAdsLoader;
  @Nullable private PlayerView playerView;
  @Nullable private ExoPlayer player;

  private List<HlsInterstitialsAdsLoader.AdsResumptionState> adsResumptionStates;

  @Override
  protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    // Create the ads loader instance.
    hlsInterstitialsAdsLoader = new HlsInterstitialsAdsLoader(this);
    // Restore ad resumption states.
    if (savedInstanceState != null) {
      ArrayList<Bundle> bundles =
          savedInstanceState.getParcelableArrayList(ADS_RESUMPTION_STATE_KEY);
      if (bundles != null) {
        adsResumptionStates = new ArrayList<>();
        for (Bundle bundle : bundles) {
          adsResumptionStates.add(
              HlsInterstitialsAdsLoader.AdsResumptionState.fromBundle(bundle));
        }
      }
    }
  }

  @Override
  protected void onStart() {
    super.onStart();
    // Build a player and set it on the ads loader.
    initializePlayer();
    // Add any stored ad resumption states to the ads loader.
    if (adsResumptionStates != null) {
      for (HlsInterstitialsAdsLoader.AdsResumptionState state : adsResumptionStates) {
        hlsInterstitialsAdsLoader.addAdResumptionState(state);
      }
      adsResumptionStates = null; // Consume the states
    }
  }

  @Override
  protected void onStop() {
    super.onStop();
    // Get ad resumption states before releasing the player.
    if (hlsInterstitialsAdsLoader != null) {
      adsResumptionStates = hlsInterstitialsAdsLoader.getAdsResumptionStates();
    }
    releasePlayer();
  }

  @Override
  protected void onDestroy() {
    // Release the ads loader when not used anymore.
    if (hlsInterstitialsAdsLoader != null) {
      hlsInterstitialsAdsLoader.release();
      hlsInterstitialsAdsLoader = null;
    }
    super.onDestroy();
  }

  @Override
  protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    // Store the ad resumption states.
    if (adsResumptionStates != null) {
      ArrayList<Bundle> bundles = new ArrayList<>();
      for (HlsInterstitialsAdsLoader.AdsResumptionState state : adsResumptionStates) {
        bundles.add(state.toBundle());
      }
      outState.putParcelableArrayList(ADS_RESUMPTION_STATE_KEY, bundles);
    }
  }

  private void initializePlayer() {
    if (player == null) {
      // Create a media source factory for HLS streams.
      MediaSource.Factory hlsMediaSourceFactory =
          new HlsInterstitialsAdsLoader.AdsMediaSourceFactory(
              checkNotNull(hlsInterstitialsAdsLoader), playerView, /* context= */ this);
      // Build player with interstitials media source
      player =
          new ExoPlayer.Builder(/* context= */ this)
              .setMediaSourceFactory(hlsMediaSourceFactory)
              .build();
      // Set the player on the ads loader.
      hlsInterstitialsAdsLoader.setPlayer(player);
      playerView.setPlayer(player);
    }

    // Use a media item with an HLS stream URI, an ad tag URI and ads ID.
    player.setMediaItem(
        new MediaItem.Builder()
            .setUri("https://www.example.com/media.m3u8")
            .setMimeType(MimeTypes.APPLICATION_M3U8)
            .setAdsConfiguration(
                new MediaItem.AdsConfiguration.Builder(Uri.parse("hls://interstitials"))
                    .setAdsId("ad-tag-0") // must be unique within ExoPlayer playlist
                    .build())
            .build());
    player.prepare();
    player.play();
  }

  private void releasePlayer() {
    if (player != null) {
      player.release();
      player = null;
    }
    if (hlsInterstitialsAdsLoader != null) {
      hlsInterstitialsAdsLoader.setPlayer(null);
    }
    if (playerView != null) {
      playerView.setPlayer(null);
    }
  }
}Hls.java

自定义播放

ExoPlayer 提供了多种方法，可让您根据应用的需求量身定制播放体验。如需查看示例，请参阅自定义页面。

停用无块准备

默认情况下，ExoPlayer 将使用无块准备。这意味着 ExoPlayer 将仅使用多变体播放列表中的信息来准备视频流，如果 #EXT-X-STREAM-INF 标记包含 CODECS 属性，则此方法有效。

如果您的媒体片段包含未在多变体播放列表中使用 #EXT-X-MEDIA:TYPE=CLOSED-CAPTIONS 标记声明的混合字幕轨道，您可能需要停用此功能。否则，系统将无法检测到这些字幕轨道，也无法播放。您可以在 HlsMediaSource.Factory 中停用无块准备，如以下代码段所示。请注意，这会增加启动时间，因为 ExoPlayer 需要下载媒体片段才能发现这些额外的轨道，因此最好在多变体播放列表中声明字幕轨道。

Kotlin

val hlsMediaSource =
  HlsMediaSource.Factory(dataSourceFactory)
    .setAllowChunklessPreparation(false)
    .createMediaSource(MediaItem.fromUri(hlsUri))Hls.kt

Java

HlsMediaSource hlsMediaSource =
    new HlsMediaSource.Factory(dataSourceFactory)
        .setAllowChunklessPreparation(false)
        .createMediaSource(MediaItem.fromUri(hlsUri));Hls.java

创建高品质 HLS 内容

为了充分利用 ExoPlayer，您可以遵循某些准则来改进 HLS 内容。如需了解完整说明，请参阅我们关于 ExoPlayer 中 HLS 播放的 Medium 博文。要点如下：

使用精确的细分时长。
使用连续的媒体流；避免在各个片段之间更改媒体结构。
使用 #EXT-X-INDEPENDENT-SEGMENTS 标记。
偏好于解复用后的流，而不是同时包含视频和音频的文件。
在多变体播放列表中尽可能包含所有信息。

以下准则专门针对直播活动：

使用 #EXT-X-PROGRAM-DATE-TIME 标记。
使用 #EXT-X-DISCONTINUITY-SEQUENCE 标记。
提供较长的直播窗口。一分钟或更长时间效果更佳。

HLS 使用集合让一切井井有条 根据您的偏好保存内容并对其进行分类。

使用 MediaItem

Kotlin

Groovy

Kotlin

Java

使用 HlsMediaSource

Kotlin

Java

访问清单

Kotlin

Java

播放包含插页式广告的 HLS 流

将 MediaItem 与 Playlist API 搭配使用

Kotlin

Java

Kotlin

Java

使用基于媒体源的 API

Kotlin

Java

监听广告事件

Kotlin

Java

Kotlin

Java

HlsInterstitialsAdsLoader lifecycle

通过广告播放状态继续播放

Kotlin

Java

自定义播放

停用无块准备

Kotlin

Java

创建高品质 HLS 内容

HLS

将 `MediaItem` 与 Playlist API 搭配使用

`HlsInterstitialsAdsLoader` lifecycle