android - 如果 VideoView 不可见，则不会调用 VideoView onPrepared

Question

我最初隐藏了 VideoView，当加载视频时，我正在显示 VideoView。但是，如果 VideoView 最初是 invisible，则永远不会调用 onPrepared。但是，如果 VideoView 可见，则正确调用 onPrepared。有没有办法隐藏 videoView 直到视频加载。任何帮助，将不胜感激。谢谢!

activity_main.xml

<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"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:visibility="invisible" />

</RelativeLayout>

MainActivity.java

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        VideoView videoView = (VideoView) findViewById(R.id.video);
        Uri videoUri = Uri.parse(url);
        videoView.setVideoURI(videoUri);
        videoView.requestFocus();

        videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {

            @Override
            public void onPrepared(MediaPlayer mp) {
                Toast.makeText(mActivity, "on prepared", Toast.LENGTH_SHORT).show();


                 videoView.setVisibility(View.VISIBLE);


            }
        });


}

Answer 1

您可以尝试将视频 View 的 alpha channel 设置为 0 或接近 0。