How to work with MediaPlayer in Android

MainActivity.java

import android.media.MediaPlayer;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;

import java.io.IOException;

public class MainActivity extends AppCompatActivity {

    private MediaPlayer mPlayer;

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

        initPlayer();
    }

    private Uri mCurrentRingtoneUri;

    private void initPlayer() {
        mPlayer = new MediaPlayer();

        mCurrentRingtoneUri = RingtoneManager.getActualDefaultRingtoneUri(getApplicationContext(), RingtoneManager.TYPE_RINGTONE);
        //mCurrentRingtoneUri = Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.dreamer_sky); //raw folder

        try {
            mPlayer.setDataSource(this, mCurrentRingtoneUri);
            mPlayer.setLooping(true);
            mPlayer.prepare();
            mPlayer.start();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}