This is the code I have:
alarme.setRepeating(AlarmManager.RTC_WAKEUP, horas, 86400000, alarmIntent);
The purpose was to send a notification after 24 hours and it works after 24 hours the problem is that we imagine my alarm is at 12:20 and I when the alarm goes off it is 13:20 on my system it triggers the alarm soon, Does anyone know how to solve it?
This is the expected behavior for AlarmManager.
The solution is to verify, before creating the alarm, if the time is earlier than the current time and, if so, add a day.
To facilitate "the accounts" we will use the class Calendar :
//Cria um Calendar para a hora do alarme
Calendar horaAlarme = Calendar.getInstance();
//Seta a hora do alarme
horaAlarme.set(Calendar.HOUR_OF_DAY, 12);
//Seta os minutos do alarme
horaAlarme.set(Calendar.MINUTE, 20);
//Coloca zero nos segundos
horaAlarme.set(Calendar.SECOND, 0);
//Cria um Calendar com a data/hora actual
Calendar horaActual = Calendar.getInstance();
//Adiciona um dia caso a hora actual for superior à do alarme(12:20)
if(horaActual.getTimeInMillis() >= horaAlarme.getTimeInMillis()){
horaAlarme.add(Calendar.DAY_OF_MONTH, 1);
}
//Agenda o Alarme
alarme.setRepeating(AlarmManager.RTC_WAKEUP,
horaAlarme.getTimeInMillis(),
AlarmManager.INTERVAL_DAY,
alarmIntent);