android - YouTube 安卓 API : YouTubePlayerFragment loading spinner

Question

我正在使用 Android YouTube API 示例在我的应用中创建无边框 YouTube 播放器。我遇到一个问题，即缓冲/加载进度条继续显示在我的视频上，即使它已加载并开始播放。我可以通过一些小的修改在 FragmentDemoActivity 示例中重现它:

public class FragmentDemoActivity extends AppCompatActivity implements YouTubePlayer.OnInitializedListener {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.fragments_demo);

        YouTubePlayerFragment youTubePlayerFragment =
            (YouTubePlayerFragment) getFragmentManager().findFragmentById(R.id.youtube_fragment);
        youTubePlayerFragment.initialize(DeveloperKey.DEVELOPER_KEY, this);
    }

    @Override
    public void onInitializationSuccess(YouTubePlayer.Provider provider, YouTubePlayer player,
          boolean wasRestored) {
        if (!wasRestored) {
            player.setPlayerStyle(YouTubePlayer.PlayerStyle.CHROMELESS);
            player.loadVideo("nCgQDjiotG0", 10);
        }
    }

    @Override
    public void onInitializationFailure(YouTubePlayer.Provider provider, YouTubeInitializationResult youTubeInitializationResult) {}

}

我已将 FragmentDemoActivity 更改为继承自 AppCompatActivity 而不是 YouTubeFailureRecoveryActivity，正如文档所说的那样。我还在 onInitializationSuccess 中将播放器样式更改为无边框。最后，我将 cueVideo 更改为 loadVideo，以触发自动播放。

这种情况发生在包括 Nexus 5X 在内的多台设备上。我正在使用库版本 1.2.2。 onInitializationFailure 没有触发错误。

视频缓冲后开始播放。播放器是无 Chrome 的。然而，缓冲微调器永远不会消失。这是一个错误，还是我在做我不允许做的事情？

Answer 1

我也遇到了，确实是bug。以下是我设法解决它的方法。

在您的onInitializationSuccess 中，在播放器 上设置一个PlaybackEventListener。覆盖 onBuffering 并执行如下操作:

ViewGroup ytView = (ViewGroup)ytPlayerFragment.getView();
ProgressBar progressBar;
try {
    // As of 2016-02-16, the ProgressBar is at position 0 -> 3 -> 2 in the view tree of the Youtube Player Fragment
    ViewGroup child1 = (ViewGroup)ytView.getChildAt(0);
    ViewGroup child2 = (ViewGroup)child1.getChildAt(3);
    progressBar = (ProgressBar)child2.getChildAt(2);
} catch (Throwable t) {
    // As its position may change, we fallback to looking for it
    progressBar = findProgressBar(ytView);
    // TODO I recommend reporting this problem so that you can update the code in the try branch: direct access is more efficient than searching for it
}

int visibility = isBuffering ? View.VISIBLE : View.INVISIBLE;
if (progressBar != null) {
    progressBar.setVisibility(visibility);
    // Note that you could store the ProgressBar instance somewhere from here, and use that later instead of accessing it again.
}

findProgressBar 方法，用作备用以防 YouTube 代码更改:

private ProgressBar findProgressBar(View view) {
    if (view instanceof ProgressBar) {
        return (ProgressBar)view;
    } else if (view instanceof ViewGroup) {
        ViewGroup viewGroup = (ViewGroup)view;
        for (int i = 0; i < viewGroup.getChildCount(); i++) {
            ProgressBar res = findProgressBar(viewGroup.getChildAt(i));
            if (res != null) return res;
        }
    }
    return null;
}

这个解决方案对我来说工作得很好，在播放器缓冲时启用 ProgressBar，在不缓冲时禁用它。

编辑:如果使用此解决方案的任何人发现此错误已被修复或 ProgressBar 的位置已更改，请分享以便我可以编辑我的答案，谢谢!