关闭程序后service停止了？

Question

我想让关闭程序后service依然执行，但是关了就没反应了 贴出代码
public class MainActivity extends ActionBarActivity {
private NotificationManager notificationManager;
private Intent intent;

private Calendar calendar = Calendar.getInstance();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
intent = new Intent("com.example.alarm.MusicService");

Startser();
}

public void Startser()
{
     MainActivity.this.startService(intent);    
}

@Override  
public void onDestroy(){  
    super.onDestroy();  

    if(intent != null){  
    }  
}  

}

Answer 1

程序是在后台运行的，而不是关闭的，如果关闭了，也就停止运行了；其实程序是在后台运行，而不是指关闭了程序；