Android Alarmmanager Send Notification Every Time App Starts Instead Of Only Once

My app use an AlarmManager that start a BroadcastReceiver. The BroadcastReceiver generate a reminder notification to the user. This is the MainActivity that start the Alarm public

Solution 1:

The issue is you are setting the time to current day. So if you are opening your app after 14:00, your alarm manager will immediately fire.

You need to check whether the time is over 14:00 for the current day, if yes you need to change the date to the next day:

Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
int curHr = calendar.get(Calendar.HOUR_OF_DAY);

// Checking whether current hour is over 14if (curHr >= 14)
{
   // Since current hour is over 14, setting the date to the next day
   calendar.add(Calendar.DATE, 1);
}

calendar.set(Calendar.HOUR_OF_DAY, 14);
// Schedule alarm manager