手动启动广告插播时间点

public VideoPlayerController(
      Context context,
      VideoPlayerWithAdPlayback videoPlayerWithAdPlayback,
      View playButton,
      View playPauseToggle,
      String language,
      ViewGroup companionViewGroup,
      Logger log) {
  ...
  
  sdkFactory = ImaSdkFactory.getInstance();
  ImaSdkSettings imaSdkSettings = sdkFactory.createImaSdkSettings();
  imaSdkSettings.setLanguage(language);
  // Tell the SDK you want to control ad break playback.
  imaSdkSettings.setAutoPlayAdBreaks(false);
  
  ...
}
...
@Override
public void onAdEvent(AdEvent adEvent) {
    ...
    switch (adEvent.getType()) {
      // Listen for the AD_BREAK_READY event.
      case AD_BREAK_READY:
        // Tell the SDK to play ads when you're ready. To skip this ad break,
        // simply return from this handler without calling adsManager.start().
        adsManager.start();
        break;
      ...
}