使用VideoView显示视频时出现android黑屏 [英] android-black screen on displaying video by using VideoView

问题描述

这是我的布局:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <FrameLayout
        android:id="@+id/frameLayout1"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_gravity="center" >

        <VideoView
            android:id="@+id/geoloc_anim"
            android:layout_width="fill_parent"
            android:layout_height="match_parent"
            android:layout_gravity="top|center"
            android:visibility="visible" />

        <FrameLayout
            android:id="@+id/placeholder"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent" >
        </FrameLayout>
    </FrameLayout>

</LinearLayout>

这是我的活动代码:

public class MainActivity extends ActionBarActivity implements OnPreparedListener {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        getSupportActionBar().hide();
        VideoView mVideoView = (VideoView) findViewById(R.id.videoview);
        Uri uri = Uri.parse("android.resource://" + getPackageName()+"/raw/lst2");
        mVideoView.setVideoURI(uri);
        mVideoView.requestFocus();
        mVideoView.setZOrderOnTop(true); 
        mVideoView.start();

    }

     @Override
      public void onPrepared(MediaPlayer mp) {
        mp.setOnInfoListener(new MediaPlayer.OnInfoListener() {
          @Override
          public boolean onInfo(MediaPlayer mp, int what, int extra) {
              View placeholder = (View) findViewById(R.id.placeholder);
            if (what == MediaPlayer.MEDIA_INFO_VIDEO_RENDERING_START)  {
              // video started; hide the placeholder.
              placeholder.setVisibility(View.GONE);
              return true;
            }
            return false;
          }
        });
     }

    public void surfaceChanged(SurfaceHolder holder, int format, int width,int height) {
    }

    public void surfaceCreated(SurfaceHolder holder) {
    }

    public void surfaceDestroyed(SurfaceHolder holder) {
    }

}

它在android 4.2上工作正常，但在android 2.3上工作不正常.在android 2.3上，它第一次打开时可以找到，但是在关闭应用程序并再次打开时，出现黑屏，如下所示:

It works fine on android 4.2 but it doesn't work properly on android 2.3 . on android 2.3 , the first time it opens it works find but when close the app and open it again ,a black screen comes , something like this :

大约一分钟后，它从黑屏变为白屏，但仍然没有任何播放.

and after one minute or so , it goes from a black screen to a white screen but still nothing plays .

您能帮我解决这个问题吗?

Could you help me to solve this problem ?

推荐答案

答案很晚.但是肯定可以帮助任何人.

Very late answer. But surely it helps anyone.

设置 videoView.setZOrderOnTop(true).

https://developer.android.com/reference/android/view/SurfaceView.html#setZOrderOnTop(boolean)

    videoView.setVideoURI(Uri.parse(uriString));
    videoView.setZOrderOnTop(true);//this line solve the problem
    videoView.start();

这篇关于使用VideoView显示视频时出现android黑屏的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！