android - SurfaceView 之上的 VideoView

Question

我尝试在 SurfaceView 之上显示一个 VideoView。但它不可见但对点击有反应(MediaController 出现并播放声音)。视频似乎在 SurfaceView 后面播放，所以我也尝试使用 setZOrderMediaOverlay() 和/或 setZOrderOnTop() 但没有任何改变

当我转到主屏幕时，我在淡入淡出的动画中看到了一瞬间的 VideoView，所以它确实存在。

我用 xml 布局尝试过，也完全以编程方式尝试过，但没有任何效果。

这是我的 Activity :

public class VideoTest extends Activity {
    private RelativeLayout mLayout;
    private VideoView mVideo;
    private Handler mHandler;
    private FrameLayout mFrameLayout;
    private SurfaceView mSurfaceView;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        mFrameLayout = new FrameLayout(this);
        mFrameLayout.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));

        mLayout = new RelativeLayout(this);
        mLayout.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
        mVideo = new VideoView(this);
        mVideo.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
        mSurfaceView = new SurfaceView(this);
        mSurfaceView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));

        mSurfaceView.setZOrderMediaOverlay(false);
        mSurfaceView.setZOrderOnTop(false);

        mFrameLayout.addView(mSurfaceView);
        mLayout.addView(mVideo);
        mFrameLayout.addView(mLayout);

        setContentView(mFrameLayout);

        // with xml
//        setContentView(R.layout.main);
//        mFrameLayout = (FrameLayout) findViewById(R.id.activity_reader);
//        mLayout = (RelativeLayout) findViewById(R.id.videoview);
//        mVideo = (VideoView) findViewById(R.id.video_view);
//        mSurfaceView = (SurfaceView) findViewById(R.id.surface_view);

        // Set the handler to me messaged from the threads
        mHandler = new Handler() {
            @Override
            public void handleMessage(Message msg) {
                if (msg != null) {
                    mVideo.setMediaController(new MediaController(mVideo.getContext()));
                    mVideo.setVideoPath("/mnt/sdcard/myvideo.mp4");
                    if (mLayout.getVisibility() == View.VISIBLE) {
                        mLayout.setVisibility(View.GONE);
                    } else {
                        mLayout.setVisibility(View.VISIBLE);
                    }
//                    mFrameLayout.bringChildToFront(mLayout);
//                    mFrameLayout.bringChildToFront(mVideo);
//                    mFrameLayout.requestLayout();
//                    mFrameLayout.invalidate();
//                    mFrameLayout.postInvalidate();
//                    mVideo.requestFocus();
                }
                super.handleMessage(msg);
            }
        };
    }

    /** Inflate the menu */
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
            MenuInflater inflater = getMenuInflater();
            inflater.inflate(R.menu.activity_reader_menu, menu);
            return true;
    }

    /** Handle menu items events */
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.toggle_video:
                new Thread() {
                    public void run() {
                        mHandler.sendEmptyMessage(0);
                    };
                }.start();
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }
}

我的 xml:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/activity_reader"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <SurfaceView android:id="@+id/surface_view"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />
    <RelativeLayout android:id="@+id/videoview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:visibility="gone">
        <VideoView android:id="@+id/video_view"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </RelativeLayout>
</FrameLayout>

一个提示:因为这只是一个找出它为什么不起作用的测试，所以我尝试最小化我的真实应用程序中的代码，其中 VideoView 的可见性由处理程序控制从 SurfaceView 的绘图线程获取消息。这就是为什么我实现了一个在使用菜单时发送消息的线程。

Answer 1

根据 this thread，我不认为你可以有重叠的 SurfaceViews Android框架工程师回答:

Sorry, you can't do this -- because surface views are very special and not really views (the surface is a separate window Z-ordered with your own), their Z-ordering does not match your views. A surface view is a big, heavy object; you are not intended to treat SurfaceView like a regular view in this way.