Alarmmanager第一次触发但不重复

Question

I want an Alarmmanager to fire first time after 2 Seconds and then every 10 Sec.

It doesn't fire the first time exactly 2 seconds later. Something between 5 and 10 sec later. And it doesn't repeat at all.

Here is my Code:

Alarmmanager:

Intent intent = new Intent(this, BackgroundService.class);
final PendingIntent pendingintent = PendingIntent.getBroadcast(getApplicationContext(), 0, intent, 0);

final AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.setRepeating(AlarmManager.RTC, System.currentTimeMillis() + 2 * 1000, 10 * 1000, pendingintent);

Manifest:

<receiver android:process=":remote" android:name=".BackgroundService"/>

BackgroundService.java:

public class BackgroundService extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        Log.d("BackgroundService", "BackgroundService onReceive");
    }
}

Answer 1

Got it:

The IDE says: The 3rd value will be forced up to 60000 (1 Min) to save battery. But I never waited so long, so it looked like it doesn't even repeates.

Snap is here

Answer 2

am.setRepeating(AlarmManager.RTC_WAKEUP, **cal_alarm.getTimeInMillis()**, 1000*60*5 , pendingIntent); 

I think you are using System.currentTimeMillis() because of which you are having that issue. Try to get the time from you code for which you have set the Alarm. The third parameter in the above code is the repeating time. You can set it to 10 sec.

Answer 3

this heslp me

if (android.os.Build.VERSION.SDK_INT >= 19) {
                alarmManager.setExact(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);
            } else {
                alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);
            }