Android AudioPlayback

import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.media.AudioAttributes;
import android.media.AudioFocusRequest;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.ToneGenerator;
import android.os.Build;
import android.os.Handler;
import android.os.IBinder;
import android.os.Looper;
import android.util.Log;

import salesken.ai.R;

public class PlayToneService extends Service implements AudioManager.OnAudioFocusChangeListener {
    private static final String TAG = "PlayToneService";
    ToneGenerator tg;
    MediaPlayer mPlayer ;

    public PlayToneService() {
    }

    @Override
    public void onCreate() {
        super.onCreate();
        mPlayer = MediaPlayer.create(PlayToneService.this, R.raw.call_end);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            mPlayer.setAudioAttributes(
                    new AudioAttributes
                            .Builder()
                            .setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
                            .build());
        }else {
            mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
        }
        AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
        int result;
        Log.d(TAG,"AudioManager.requestAudioFocus...");
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            result=  audioManager.requestAudioFocus(new AudioFocusRequest.Builder(AudioManager.AUDIOFOCUS_GAIN)
                    .setAudioAttributes(
                            new AudioAttributes.Builder()
                                    .setUsage(AudioAttributes.USAGE_MEDIA)
                                    .setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
                                    .build()
                    )
                    .setAcceptsDelayedFocusGain(true)
                    .setOnAudioFocusChangeListener(this).build()
            );
        } else {

            result=  audioManager.requestAudioFocus(this,
                    AudioManager.STREAM_MUSIC,
                    AudioManager.AUDIOFOCUS_GAIN);
        }

        if (result == AudioManager.AUDIOFOCUS_REQUEST_GRANTED) {
            Log.d(TAG,"AUDIOFOCUS_REQUEST_GRANTED Granted bhai");
           /* tg= new ToneGenerator(AudioManager.STREAM_ALARM, 100);
            tg.startTone(ToneGenerator.TONE_PROP_BEEP);*/


            mPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
                @Override
                public void onCompletion(MediaPlayer mp) {
                    mp.release();
                    stopSelf();

                }
            });
            mPlayer.setOnErrorListener(new MediaPlayer.OnErrorListener() {
                @Override
                public boolean onError(MediaPlayer mp, int what, int extra) {
                    mp.release();
                    stopSelf();

                    return false;
                }
            });
            new Handler(Looper.getMainLooper()).postDelayed(new Runnable() {
                @Override
                public void run() {
                    mPlayer.stop();
                }
            },1000);
            mPlayer.setLooping(true);

            mPlayer.start();

        } else {
            // Audio Focus Gain failed
            Log.d(TAG,"Not Granted bhai");
            stopSelf();
        }

    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        // We don't want this service to continue running if it is explicitly
        // stopped, so return not sticky.
        return START_NOT_STICKY;
    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO: Return the communication channel to the service.
        throw new UnsupportedOperationException("Not yet implemented");
    }

    @Override
    public void onAudioFocusChange(int focusChange) {
        Log.d(TAG,"focusChange ..."+focusChange);
        if (focusChange == AudioManager.AUDIOFOCUS_GAIN) {
            // You now have the audio focus and may play sound.
            Log.d(TAG,"Granted bhai");

            Log.d(TAG,"AudioManager.AUDIOFOCUS_REQUEST_Sucess...");


        }
        else if (focusChange == AudioManager.AUDIOFOCUS_REQUEST_FAILED) {
            // Handle the failure.
            Log.d(TAG,"AudioManager.AUDIOFOCUS_REQUEST_FAILED ...");
            stopSelf();

        }

    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        if(mPlayer != null){
            mPlayer.release();
            mPlayer=null;
        }

    }
}