Android: How to use AlarmManager

Question

I need to trigger a block of code after 20 minutes from the `AlarmManager` being set. Can someone show me sample code on how to use an `AlarmManager` in ِAndroid? I have been playing around with some code for a few days and it just won't work.

Accepted Answer

"Some sample code" is not that easy when it comes to `AlarmManager`.

Here is a snippet showing the setup of `AlarmManager`:

```
AlarmManager mgr=(AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
Intent i=new Intent(context, OnAlarmReceiver.class);
PendingIntent pi=PendingIntent.getBroadcast(context, 0, i, 0);

mgr.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime(), PERIOD, pi);
```

In this example, I am using `setRepeating()`. If you want a one-shot alarm, you would just use `set()`. Be sure to give the time for the alarm to start in the same time base as you use in the initial parameter to `set()`. In my example above, I am using `AlarmManager.ELAPSED_REALTIME_WAKEUP`, so my time base is `SystemClock.elapsedRealtime()`.

Here is a larger sample project showing this technique.

Android: How to use AlarmManager

Solution

Problem

Related problems