如何在MediaPlayer准备播放时显示ProgressBar？

<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"
    tools:context=".MainActivity">

    <SurfaceView
        android:id="@+id/surfaceView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <ProgressBar
        android:id="@+id/progressBar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true" />

</RelativeLayout>

import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.widget.ProgressBar;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity implements MediaPlayer.OnPreparedListener {

    private MediaPlayer mediaPlayer;
    private SurfaceHolder surfaceHolder;
    private ProgressBar progressBar;

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

        SurfaceView surfaceView = findViewById(R.id.surfaceView);
        progressBar = findViewById(R.id.progressBar);

        surfaceHolder = surfaceView.getHolder();
        surfaceHolder.addCallback(new SurfaceHolder.Callback() {
            @Override
            public void surfaceCreated(SurfaceHolder holder) {
                mediaPlayer = new MediaPlayer();
                mediaPlayer.setDisplay(surfaceHolder);
                mediaPlayer.setOnPreparedListener(MainActivity.this);

                try {
                    mediaPlayer.setDataSource("YOUR_MEDIA_FILE_URL");
                    mediaPlayer.prepareAsync();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

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

            @Override
            public void surfaceDestroyed(SurfaceHolder holder) {
                mediaPlayer.release();
            }
        });
    }

    @Override
    public void onPrepared(MediaPlayer mp) {
        progressBar.setVisibility(View.GONE);
        mediaPlayer.start();
    }
}