我正在使用以下代码
startService(new Intent(Loading.this, AppService.class));
public class AppService extends Service 
{       
    private Timer timer;
    @Override
    public IBinder onBind(Intent arg0) 
    {
        return null;
    }
    @Override
    public void onCreate()
    {
        timer = new Timer();
        timer.scheduleAtFixedRate(new TimerTask() 
        {
            @Override
            public void run() 
            {
                SharedPreferences customSharedPreference = getSharedPreferences(
                          "UserSharedPrefs", Activity.MODE_PRIVATE);
                boolean isLoggedIn = customSharedPreference.getBoolean("isLoggedIn", false);
                if (isLoggedIn)
                    updateContact();
            }
        },0 , 120 * 1000);  
    }
    @Override
    public int onStartCommand(Intent intent, int flags, int startId)
    {
        return Service.START_NOT_STICKY;
    }
     @Override
     public void onDestroy() 
     {
         super.onDestroy();
         timer.cancel();
         timer = null;      
     }
什么都没有发生,调试器甚至不会进入服务。没有 OnCreate 或任何其他被调用的东西。