有没有办法恢复YouTube API视频？

Question

我正在使用YouTube API为Android编写一个简单的应用程序-我希望能够实现选择应用程序中的每个视频/直播流的自动恢复。当我初始化时，我可以设置自动播放。但是，我目前遇到的问题是，当我像下面的代码一样尝试执行时，它并没有按照我想要的方式进行（每次我将该应用程序置于后台并恢复它时，它都会显示播放按钮）。

public class MainActivity extends YouTubeBaseActivity implements YouTubePlayer.OnFullscreenListener, YouTubePlayer.OnInitializedListener {

    //private YouTubePlayer player = null;
    private boolean isFullscreen;
    private static final int RECOVERY_DIALOG_REQUEST = 1;
    private YouTubePlayerView youTubePlayerView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        /** Initializing YouTube Player View for displaying YouTube video **/
        youTubePlayerView = (YouTubePlayerView) findViewById(R.id.youtube_player);
        youTubePlayerView.initialize(DeveloperKey.DEVELOPER_KEY, this);

    }

    @Override
    public void onInitializationSuccess(YouTubePlayer.Provider provider, YouTubePlayer player, boolean wasRestored) {

        player.setFullscreen(true);
        player.setOnFullscreenListener(this);

        if (!wasRestored) {
            player.loadVideo(YouTubeVideoId.VIDEO_ID);
        }
    }

    @Override
    public void onInitializationFailure(YouTubePlayer.Provider provider,
                                        YouTubeInitializationResult errorReason) {
        if (errorReason.isUserRecoverableError()) {
            errorReason.getErrorDialog(this, RECOVERY_DIALOG_REQUEST).show();
        } else {
            String errorMessage = String.format(getString(R.string.error_player), errorReason.toString());
            Toast.makeText(this, errorMessage, Toast.LENGTH_LONG).show();
        }
    }

    @Override
    public void onFullscreen(boolean isFullscreen) {
        this.isFullscreen = isFullscreen;
    }

    @Override
    public void onResume() {
        super.onResume();
        youTubePlayerView.initialize(DeveloperKey.DEVELOPER_KEY, this);
    }

}

非常感谢您的帮助和建议！

- Harvey Dent

Answer 1

我有解决方案：

我曾经遇到过完全相同的问题，尝试了官方提供的示例后，发现他们也面临着完全相同的问题。外部控件似乎无法以任何重要的方式与播放器进行交互。更不用说获取一个新的YoutubePlayer往往会出现问题。然而，通过测试和尝试不同的方法，我成功地发现了一些东西：

即使你保存了一个静态引用到你的YoutubePlayer，这个引用也无法改变播放器的任何方式。但是你仍然可以检索到视频暂停的位置。因此，对我来说下一个逻辑步骤是尝试这样做：

1. Getting the position from the player before leaving the activity:

   Integer myMILLIS = yplayer.getCurrentTimeMillis();
   

2. Then, when coming back reload the video, and move it to the right position:

   // Reload the SAME VIDEO again (yplayer is the YoutubePlayer)
   yplayer.cueVideo(mVideoURL);
   // Get the position you saved back
   yplayer.seekToMillis(myMILLIS);
   // Start Playing the video from that position again
   yplayer.play();
   

事实上，由于某种奇怪的原因，这一方法单独使用并不能起作用。但是当我尝试调试之前的代码时，有时候它竟然能够正常工作。

经过更多的测试后，我发现了之前解决方案的问题：在调用之后...

    yplayer.cueVideo(mVideoURL);

调用其他内容会立即失败。因此，这可能是一个奇怪的解决方案，但它确实完美地工作：

1. Getting the position from the player before leaving the activity:

   Integer myMILLIS = yplayer.getCurrentTimeMillis();
   

2. Then, when coming back reload the video:

   // Reload the SAME VIDEO again (yplayer is the YoutubePlayer)
   yplayer.cueVideo(mVideoURL);
   

3. Before doing anything else, we have to wait a little:

   // The next pause is here to allow the video to load
   try
   {
       Thread.sleep(1000);
   } catch (InterruptedException e)
   {
       // Do something here if you need to
   }
   

4. Move it to the right position again, and play it:

   // Get the position you saved back
   yplayer.seekToMillis(myMILLIS);
   // Start Playing the video from that position again
   yplayer.play();
   

那解决了我的问题。希望它也解决了你的。

- Carlos Nina