Play Sound using SoundPool in Android

package com.example.playsound;
 
import android.app.Activity;
import android.content.Loader.OnLoadCompleteListener;
import android.media.AudioManager;
import android.media.SoundPool;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
 
public class MainActivity extends Activity implements OnTouchListener {
    private SoundPool soundPool;
    private int id;
    boolean flag = false;
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        View view = findViewById(R.id.textView1);
        view.setOnTouchListener(this);
        // Set the hardware buttons to control the music
        this.setVolumeControlStream(AudioManager.STREAM_MUSIC);
        soundPool = new SoundPool(10, AudioManager.STREAM_MUSIC, 0);
        soundPool.setOnLoadCompleteListener(new OnLoadCompleteListener() {
            @Override
            public void onLoadComplete(SoundPool soundPool, int sampleId,
                    int status) {
                flag = true;
            }
        });
        id = soundPool.load(this, R.raw.BigBossDeath, 1);
 
    }
 
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_DOWN) {
            AudioManager audioManager = (AudioManager) getSystemService(AUDIO_SERVICE);
            float actualVolume = (float) audioManager
                    .getStreamVolume(AudioManager.STREAM_MUSIC);
            float maxVolume = (float) audioManager
                    .getStreamMaxVolume(AudioManager.STREAM_MUSIC);
            float volume = actualVolume / maxVolume;
            if (flag) {
                soundPool.play(id, volume, volume, 1, 0, 1f);
            }
        }
        return false;
    }
}