AlarmManager setRepeating 忽略间隔

发布于 2025-01-05 11:54:37 字数 999 浏览 1 评论 0原文

我使用此代码在我们的业务应用程序中设置警报：

private void setupAlarm() {
    final Context c = getApplicationContext();
    final AlarmManager alarm = 
        (AlarmManager) c.getSystemService(Context.ALARM_SERVICE);
    final Intent i = new Intent(c, AlarmReceiver.class);
    final PendingIntent sender = 
         PendingIntent.getBroadcast(c, 0, i, PendingIntent.FLAG_CANCEL_CURRENT);
    final long startFromNow = System.currentTimeMillis()+10000;
    final long timer = 5*60*1000;
    alarm.setRepeating(AlarmManager.RTC_WAKEUP, startFromNow, timer, sender);
}

我无法理解为什么不遵守警报的间隔。第一个警报在 10 秒后启动（如预期），之后每隔 2 分钟（122 秒到 127 秒）启动一次，这是错误的。间隔是5分钟，还是我错了？

我在一个更简单的应用程序中使用了这个确切的代码：一个设置重复警报的活动，接收器只创建一个日志。在那里它起作用了。

是什么让 AlarmManager 的行为如此不同？我尝试过：

使用 set() 并在警报接收器中使用另一个 set() 超过 5 分钟：在 2 分钟时启动
使用 setInexactRepeating()< /code> 而不是 setRepeating()：在 2 分钟后启动

任何见解都会有所帮助。谢谢！

原文

I use this code to setup an alarm in our business application:

private void setupAlarm() {
    final Context c = getApplicationContext();
    final AlarmManager alarm = 
        (AlarmManager) c.getSystemService(Context.ALARM_SERVICE);
    final Intent i = new Intent(c, AlarmReceiver.class);
    final PendingIntent sender = 
         PendingIntent.getBroadcast(c, 0, i, PendingIntent.FLAG_CANCEL_CURRENT);
    final long startFromNow = System.currentTimeMillis()+10000;
    final long timer = 5*60*1000;
    alarm.setRepeating(AlarmManager.RTC_WAKEUP, startFromNow, timer, sender);
}

I cannot understand why the interval for the alarm is not respected. First alarm starts after 10 seconds (as expected), afterwards it starts every 2 minutes and a bit (122 seconds to 127 seconds), which is wrong. The interval is 5 minutes, or am I wrong?

I use this exact code in a simpler application: one activity that sets the repeating alarm and the receiver just creates a log. There it works.

What could make the AlarmManager act so different?
I have tried to:

use set() and in the alarm receiver use another set() for over 5 minutes: launch at 2 minutes
use setInexactRepeating() instead of setRepeating(): launch at 2 minutes

Any insight would be helpful. Thanks!

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