Service public method is not firing my activity restarts

[shadman kudchikar]

this is in my main activity

 musicService.setOnCompletitionListener(new OnCompletionListener()
		      {

			 	    public void onCompletion(MediaPlayer theMediaPlayer) {
			 	    	musicService.getNextSong();
			 	    	playSong();
			 	    	Toast.makeText(getApplicationContext(), "Activity Song Cmp Listener", Toast.LENGTH_LONG).show();
							
			 	    }

this is in my service class

public void getNextSong() {		
		Toast.makeText(getApplicationContext(), SongList.size(), Toast.LENGTH_LONG).show();
		Toast.makeText(getApplicationContext(), CurrentSongID, Toast.LENGTH_LONG).show();
	}

public void setOnCompletitionListener(OnCompletionListener onCompletionListener)
	{
		mediaPlayer.setOnCompletionListener(onCompletionListener);
	}