如何在安卓系统中播放.mp4视频作为背景视频？

<RelativeLayout 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">

    <VideoView
        android:id="@+id/videoView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <!-- 其他组件或布局 -->

</RelativeLayout>

import android.net.Uri;
import android.os.Bundle;
import android.widget.VideoView;

public class MainActivity extends AppCompatActivity {

    private VideoView videoView;

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

        videoView = findViewById(R.id.videoView);

        // 设置视频播放的背景资源
        videoView.setVideoURI(Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.background_video));

        // 设置循环播放
        videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                mp.setLooping(true);
            }
        });

        // 开始播放视频
        videoView.start();
    }
}