我的应用程序需要执行一个特定的任务每隔一小时。这不要紧，如果应用程序是乳宁，暂停，甚至关闭。

My app needs to execute a specific task every hour. It does not matter if app is runing, suspended, or even closed.

当应用程序正在运行或暂停，我可以只安排一个AlarmManager的BroadcastReceiver做到这一点。但是，当应用程序被关闭，我必须调用unregisterReceiver不漏一个意图，并且应用程序将永远不会醒（或东西）来处理任务。

When app is running or suspended, I can do it by just scheduling an AlarmManager broadcastreceiver. But when the application is closed, I have to call "unregisterReceiver" to not leak an intent, and app will never be wake up (or something) to process the task.

那么，问题是：如何安排，我并不需要注销alarmmanager的任务，所以它会被调用，即使我的应用程序被关闭

推荐答案

使用 AlarmManager.setRepeating（int型的，长triggerAtTime，间隔长，PendingIntent操作）这一点。将类型设置为 AlarmManager.RTC_WAKEUP ，以确保该设备被唤醒，如果睡眠（如果这是你的要求）。

Use AlarmManager.setRepeating(int type, long triggerAtTime, long interval, PendingIntent operation) for this. Set the type to AlarmManager.RTC_WAKEUP to make sure that the device is woken up if it is sleeping (if that is your requirement).

事情是这样的：

    Intent intent = new Intent("com.foo.android.MY_TIMER");
    PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
    AlarmManager manager = (AlarmManager) getSystemService(ALARM_SERVICE);
    long now = System.currentTimeMillis();
    long interval = 60 * 60 * 1000; // 1 hour
    manager.setRepeating(AlarmManager.RTC_WAKEUP, now + interval, interval,
        pendingIntent); // Schedule timer for one hour from now and every hour after that

您传递一个PendingIntent这个方法。您不必担心泄露意图。

You pass a PendingIntent to this method. You don't need to worry about leaking Intents.

记住调用开启闹铃 AlarmManager.cancel（）时，你不需要它了。

Remember to turn the alarm off by calling AlarmManager.cancel() when you don't need it anymore.

不注册在code接收器这一点。只需添加一个＆LT;意向滤光器＆gt; 标签来为您的BroadcastReceiver清单条目，像这样：

Don't register a Receiver in code for this. Just add an <intent-filter> tag to the manifest entry for your BroadcastReceiver, like this:

    <receiver android:name=".MyReceiver">
        <intent-filter>
            <action
                    android:name="com.foo.android.MY_TIMER"/>
        </intent-filter>
    </receiver>