我有以下代码用于每隔X秒从服务器轮询未读通知计数

我通过App.onCreate()中的ScheduledThreadPoolExecutor启动此过程

Log.d("XXX", "Requesting Notification count from server ...");

被调用一次(我可以在Logcat中看到),但两个Retrofit回调函数都没有被调用(实际上没有Retrofit调试日志).更重要的是,“从服务器请求通知计数……”永远不会再次打印(即周期性任务没有运行)

我正在使用Retrofit进行其他webservice调用(在用户输入时)并且它们工作正常(我可以在logcat中看到传入和传出的请求/响应)

public class App extends Application {

private ScheduledExecutorService scheduleTaskExecutor;

...

@Override

public void onCreate() {

super.onCreate();

//region Set up the periodic notification count listener task

scheduleTaskExecutor= Executors.newScheduledThreadPool(2);

scheduleTaskExecutor.scheduleAtFixedRate(new PeriodicNotifCountFetchTask(), 0, 5, TimeUnit.SECONDS);

//endregion

}

class PeriodicNotifCountFetchTask implements Runnable {

@Override

public void run() {

Log.d("XXX", "Requesting Notification count from server ...");

EMRestClient.getmEMRestService().getNotificationCount(new Callback() {

@Override

public void success(NotificationCount response, Response unused) {

int unreadNotifCount = response.getCount();

Log.d("XXX", "Successfully fetched notification count, unread = " + response.getCount());

if (unreadNotifCount>0){

// call listener to repaint menu

for (NewNotificationListener x :notifListeners){

x.onNewNotificationReceived(response.getCount());

}

}

}

@Override

public void failure(RetrofitError error) {

Log.d("XXX", "Failed to fetch notification count from server");

}

});

}

}

}

代码的改进部分在这里：

@POST("/notification/notification_count/")

void getNotificationCount(Callback callback);