安卓-使用VideoView显示视频时出现黑屏开发者社区

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<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>

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) {
}

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

public class VideoPlayer extends VideoView {
public VideoPlayer(Context context) {
    super(context);
    init();
public void init() {
    setAlpha(0); // hides view 
    setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
        @Override
        public void onPrepared(MediaPlayer mp) {
            mp.setOnInfoListener(new MediaPlayer.OnInfoListener() {
                @Override
                public boolean onInfo(MediaPlayer mp, int what, int extra) {
                    if (what == MediaPlayer.MEDIA_INFO_VIDEO_RENDERING_START) {
                        setAlpha(1); // shows view
                        return true;
                    return false;
    });

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:layout_gravity="center"
    tools:context=".SecondaryDisplay"
    android:background="@color/black">
    <VideoView
        android:id="@+id/videoView1"
        android:layout_width="match_parent"

问 安卓-使用VideoView显示视频时出现黑屏 EN

回答 9

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