Question

通过重复调用IntentService来轮询服务器更新，我有以下内容来启动BroadcastReceiver：

AlarmManager pollManager;
Intent pollIntent;
PendingIntent pollPendingIntent;

...

pollIntent = new Intent(getActivity(), ActionUpdateReceiver.class);
pollIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
pollIntent.putExtra(RECEIVER, resultReceiver);
pollIntent.putExtra(USER, accountId);

// This is the crux of my question
pollIntent.putExtra(SOMETHING_THAT_UPDATES, updatingThing);

pollPendingIntent = PendingIntent.getBroadcast(getActivity(), ACTION_REQUEST,
        pollIntent, PendingIntent.FLAG_CANCEL_CURRENT);
pollManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(),
        POLL_INTERVAL, pollPendingIntent);

在轮询服务器和使用ResultReceiver获取服务器更新方面，上述方法效果很好。但是，我需要向轮询服务提供一些反馈，以便更改我的更新查询。

我应该如何向投票服务提供反馈？如果要求更新查询，我是否只需要取消当前警报并再次设置意图？有没有比取消更好的方法？

Answer 1

我认为你的问题......我想你想在上面的警报管理器设置后更改项目中某处“更新”的值如果这是您的问题，请检查此解决方案对于上面代码中的设置警报，只需替换此行

pollIntent = new Intent(getActivity(), ActionUpdateReceiver.class);

由此

pollIntent = new Intent(getActivity().getApplicationContext(), ActionUpdateReceiver.class);

和PendingIntent也是

pollPendingIntent = PendingIntent.getBroadcast(getActivity().getApplicationContext(), ACTION_REQUEST,
        pollIntent, PendingIntent.FLAG_CANCEL_CURRENT);

并将此代码放在您想要反馈更新的位置

AlarmManager pollManager;
Intent pollIntent;
PendingIntent pollPendingIntent;

...

pollIntent = new Intent(getActivity().getApplicationContext(), ActionUpdateReceiver.class);
pollIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
pollIntent.putExtra(RECEIVER, resultReceiver);
pollIntent.putExtra(USER, accountId);


pollIntent.putExtra(SOMETHING_THAT_UPDATES, updatingThing); // your update here

pollPendingIntent = PendingIntent.getBroadcast(getActivity().getApplicationContext(), ACTION_REQUEST,
        pollIntent, PendingIntent.FLAG_CANCEL_CURRENT);
pollManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(),
        POLL_INTERVAL, pollPendingIntent);

将更新发送到重复BroadcastReceiver

1 个答案: