VideoView内部片段导致黑屏轻弹

Question

我们在Android API 4.0上运行了一个Android应用程序.其中一个活动的布局将屏幕分为两部分.在左侧,我们有一个带有一些按钮的静态部分.在右侧,我们有一个FrameLayout,它将根据按下的按钮切换到相应的片段.

问题: 右侧的一个片段包含VideoView.当用户点击按钮以显示该片段时,片段被显示并且视频立即开始播放:在渲染该片段时,整个屏幕以黑色闪烁,这非常烦人.

以下是VideoFragment类的一些代码:

public class VideoFragment extends Fragment {

    public VideoView videoView;

    private ExternalVideo mVideo;
    private boolean mVideoExists;
    private String mDestination;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mDestination = ApplicationParams.MEDIA_STORAGE_PATH + "videos/"
                + FilenameUtils.getBaseName(((DetailActivity)getActivity()).getProduct().getVideoUrl())
                + "."
                + FilenameUtils.getExtension(((DetailActivity) getActivity()).getProduct().getVideoUrl());

        File file = new File(mDestination);
        mVideoExists = file.exists() && file.isFile();
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view;

        if (mVideoExists) {
            getActivity().getWindow().setFormat(PixelFormat.TRANSLUCENT);
            view = inflater.inflate(R.layout.video, null);
            mVideo = new ExternalVideo(mDestination);

            videoView = (VideoView) view.findViewById(R.id.video_video);

            MediaController mediaController = new MediaController(getActivity());
            mediaController.setAnchorView(videoView);

            videoView.setMediaController(mediaController);
            videoView.setVideoPath(mVideo.getFullPath());
            videoView.requestFocus();
            videoView.setVisibility(View.VISIBLE);

            videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                public void onPrepared(MediaPlayer mp) {
                    videoView.start();

                }
            });
        } else {
            TextView textView = new TextView(getActivity());
            textView.setText(getActivity().getString(R.string.videofragment_video_coming_soon));
            textView.setPadding(50, 50, 50, 50);
            view = textView;
        }

        return view;
    }

}

以下是视频片段的布局:

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent">
    <VideoView android:id="@+id/video_video"
               android:layout_width="fill_parent"
               android:layout_alignParentRight="true"
               android:layout_alignParentLeft="true"
               android:layout_alignParentTop="true"
               android:layout_alignParentBottom="true"
               android:layout_height="fill_parent"/>
</RelativeLayout>

有没有人知道在渲染包含VideoView的片段时可能导致这个闪烁问题？一个解决方案将不胜感激!

编辑1:如果我点击VideoView在屏幕上的片段在屏幕上开始闪烁.当我然后导航到anoter片段并返回到包含VideoView的片段时,闪烁消失了.

Answer 1

我能够通过在片段的父活动的布局中添加0px by 0px SurfaceView来解决这个问题:

<SurfaceView
        android:layout_width="0px"
        android:layout_height="0px" />

Answer 2

KennyDs是对的,但更好的是确保隐藏SurfaceView,否则如果你动画碎片你将会有非常奇怪的行为,那么除了动画片段之外你什么都看不到黑屏.幸运的是,这个抵押品问题也很容易解决:

<SurfaceView
    android:layout_width="0px"
    android:layout_height="0px"
    android:visibility="gone" />