Android定时任务只执行一次,android – ScheduledThreadPoolExecutor用于定期任务(使用Retrofit)只需触发一次而不再重复...
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
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);
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