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Editorial Team
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Asked: 2026-05-27T17:41:29+00:00

I’m creating an alarm application. In my application, the user can select the days

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I’m creating an alarm application.

In my application, the user can select the days to fire the alarm, such as Sunday, Monday, so I used the Calendar class and AlarmManager to register multiple alarms.

If the selected day or days are less than the current day of the week, the alarm fires immediately.

Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.DAY_OF_WEEK, getDayint); //sunday = 1
calendar.set(calendar.HOUR_OF_DAY, gethour);
calendar.set(calendar.MINUTE, getmin);
calendar.set(calendar.SECOND, 0);
calendar.set(calendar.MILLISECOND, 0);

long TIM = calendar.getTimeInMillis();

Intent intent = new Intent(MainActivity.this, AlarmReceiver.class);
PendingIntent sender = PendingIntent.getBroadcast(MainActivity.this, 0, intent,PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP, TIM, sender);

//repeat weekly
am.setRepeating(am.RTC,TIM, AlarmManager.INTERVAL_DAY*7, sender);
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1 Answer

  1. Editorial Team

    By using PendingIntent.FLAG_UPDATE_CURRENT you say that you like to have only one such alarm – so latest one wins – only one alarm weekly. And if TIM lies in past, alarm is fired immediately ( and then repeating ) So far – everything works as designed.

    You may check whether TIM ( by the way, it is variable, and concention is that they shall be not uppercased like constants ) is less than System.currentTimeMillis() and add one week to it in this case

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