安卓 利用videoView 播放资源文件 并且全屏播放 适用于闪屏页

int width = this.getWindowManager().getDefaultDisplay().getWidth();
    int height = this.getWindowManager().getDefaultDisplay().getHeight();
    Uri uri = Uri.parse("android.resource://" + getPackageName() + "/"
            + R.raw.qidongfirst);
    tiaoguo = (Button) findViewById(R.id.tiaoguo);
    videoView = (VideoView) findViewById(R.id.video);
    if (videoView != null ) {
        ViewGroup.LayoutParams lp = videoView.getLayoutParams();
        lp.width = width;
        lp.height = height;
        videoView.setLayoutParams(lp);
        videoView.setVideoURI(uri);
            videoView.start();}