package com.example.servicetest; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; public class MainActivity extends Activity {   @Override   protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.activity_main);     Button btnstart = (Button) findViewById(R.id.btnstart);     btnstart.setOnClickListener(new OnClickListener() {        @Override       public void onClick(View v) {         startService(new Intent("com.yarin.Android.MUSIC"));       }     });     Button btnstop = (Button) findViewById(R.id.btnstop);     btnstop.setOnClickListener(new OnClickListener() {        @Override       public void onClick(View v) {         stopService(new Intent("com.yarin.Android.MUSIC"));       }     });   } }

package com.example.servicetest; import android.app.Service; import android.content.Intent; import android.media.MediaPlayer; import android.os.IBinder; public class MusicService extends Service {   private MediaPlayer player;   @Override   public IBinder onBind(Intent intent) {     // TODO Auto-generated method stub     return null;   }   public void onStart(Intent intent, int startId) {     super.onStart(intent, startId);     player = MediaPlayer.create(this, R.raw.a);     player.start();   }   public void onDestroy() {     super.onDestroy();     player.stop();   } }