Setting a repeating alarm in android
android, android-alarms, java
Solution
I think your line:
am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), cal_alarm.getTimeInMillis() , pi); // Millisec * Second * Minute
is triggering the alarm immediately, the second param is the scheduled time, and the third is the period. So if you wanted your alarm to go off at cal_alarm time, you want to use something like:
am.setRepeating(AlarmManager.RTC_WAKEUP, cal_alarm.getTimeInMillis(), 1000*60*5 , pi); // Millisec * Second * Minute
That should go off at the cal_alarm time, and repeat every 5 mins.
AlarmManager.SetRepeating API Doc
Problem
I am trying to set a repeating alarm in android that eventually will go up at a user specified time. However the alarm goes off right away when once it is set, even when I make sure the alarm isn't set to go off until after the alarm has been set. For example, I have the code below set to have an alarm go off at 10:43 so I set the alarm at 10:41, but the alarm goes off right away. Any ideas? Thanks in advance. ``` public class Alarm extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { PowerManager pm = (PowerManager) context .getSystemService(Context.POWER_SERVICE); PowerManager.WakeLock wl = pm.newWakeLock( PowerManager.PARTIAL_WAKE_LOCK, ""); wl.acquire(); Toast.makeText(context, "Alarm !!!!!!!!!!", Toast.LENGTH_LONG).show(); // For Intent scheduledIntent = new Intent(context,ReminderMessage.class); scheduledIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); context.startActivity(scheduledIntent); // example wl.release(); } public void SetAlarm(Context context) { AlarmManager am = (AlarmManager) context .getSystemService(Context.ALARM_SERVICE); Date dat = new Date(); Calendar cal_alarm = Calendar.getInstance(); Calendar cal_now = Calendar.getInstance(); cal_now.setTime(dat); cal_alarm.setTime(dat); cal_alarm.set(Calendar.HOUR_OF_DAY, 10); cal_alarm.set(Calendar.MINUTE, 43); cal_alarm.set(Calendar.SECOND, 0); if(cal_alarm.before(cal_now)){ cal_alarm.add(Calendar.DATE, 1); } Intent i = new Intent(context, Alarm.class); PendingIntent pi = PendingIntent.getBroadcast(context, 0, i, 0); am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), cal_alarm.getTimeInMillis() , pi); // Millisec * Second * Minute } public void CancelAlarm(Context context) { Intent intent = new Intent(context, Alarm.class); PendingIntent sender = PendingIntent .getBroadcast(context, 0, intent, 0); AlarmManager alarmManager = (AlarmManager) context .getSystemService(Context.ALARM_SERVICE); alarmManager.cancel(sender); } } ```