Repeating Alarm for specific days of week android

Question

In my application I have a functionality to trigger alarm in 4 senerios:

• Only once for a user chosen date and time
• Daily for chosen time
• Weekly according to chosen date and time
• User chosen custom days of the week

I successfully implement the first 3 senerios by using the follow:

Only once:

Calendar calendar = Calendar.getInstance();

        calendar.set(Calendar.YEAR, Integer.parseInt(date[0]));
        calendar.set(Calendar.MONTH, (Integer.parseInt(date[1])) - 1);
        calendar.set(Calendar.DAY_OF_MONTH, Integer.parseInt(date[2]));
        calendar.set(Calendar.HOUR_OF_DAY, Integer.parseInt(time[0]));
        calendar.set(Calendar.MINUTE, Integer.parseInt(time[1]));
        calendar.set(Calendar.SECOND, 0);

        alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);

For daily scheduling:

Calendar calendar = Calendar.getInstance();
            calendar.setTimeInMillis(System.currentTimeMillis());
            calendar.set(Calendar.HOUR_OF_DAY, Integer.parseInt(time[0]));
            calendar.set(Calendar.MINUTE, Integer.parseInt(time[1]));
            calendar.set(Calendar.SECOND, 0);

            alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pendingIntent);

For weekly scheduling (as per system date):

Calendar calendar = Calendar.getInstance();
        calendar.setTimeInMillis(System.currentTimeMillis());

        calendar.set(Calendar.DAY_OF_WEEK, dayOfWeek);
        calendar.set(Calendar.HOUR_OF_DAY, Integer.parseInt(time[0]));
        calendar.set(Calendar.MINUTE, Integer.parseInt(time[1]));
        calendar.set(Calendar.SECOND, 0);
        //long interval = calendar.getTimeInMillis() + 604800000L;
        alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY * 7, pendingIntent);

For custom weekdays chosen by user (ex. only for monday and friday, repeated weekly) I am using the same code that I used for weekly scheduling by iteration. But its not working for monday (which is set before friday) and working for friday. Also, it does not trigger the alarm for today if today (system date) is a monday or a friday.

So how do i implement weekly alarm scheduling for custom days of the week?

Solution 1

There isn't a way for you to tell Alarm manager which days you want to it trigger.

One solution would be to have an alarm for each day of the week you want it to trigger repeating weekly.

So for your Monday and Friday scenario, you would set a weekly repeating reminder on Monday and a weekly repeating reminder on Friday.

Example code:

private void scheduleAlarm(int dayOfWeek) {

    Calendar calendar = Calendar.getInstance();
    calendar.set(Calendar.DAY_OF_WEEK, dayOfWeek);

    // Check we aren't setting it in the past which would trigger it to fire instantly
    if(calendar.getTimeInMillis() < System.currentTimeMillis()) {
        calendar.add(Calendar.DAY_OF_YEAR, 7);
    }

    // Set this to whatever you were planning to do at the given time
    PendingIntent yourIntent; 

    AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY * 7, yourIntent);
}

private void setUpAlarms() {

    scheduleAlarm(Calendar.MONDAY);
    scheduleAlarm(Calendar.FRIDAY);
}

Solution 2

1) sunday=1, moday=2;, tuesday=3,......saturday=7  
2)selectedDays.size()*(it will be which date you have selected , if you seleted monday , tues ,friday , then it will 3 size )*    

3) for time if we choose from datetimepicker  
 **String[] timespilt = tv_timepicker.getText().toString().split(":");**


     for (int i = 0; i < selectedDays.size(); i++) {

         // for alarm ...
           calNow = Calendar.getInstance();
           calSet = (Calendar) calNow.clone();

            int day = calSet.get(Calendar.DAY_OF_WEEK); 
        calSet.set(Calendar.HOUR_OF_DAY,Integer.parseInt(timespilt[0].trim()));
                                        calSet.set(Calendar.MINUTE, Integer.parseInt(timespilt[1].trim()));
                                        calSet.set(Calendar.SECOND, 0);
                                        calSet.set(Calendar.MILLISECOND, 0);
                                        calSet.set(Calendar.DAY_OF_WEEK,selectedDays.get(i));


                                    if (calSet.compareTo(calNow) <= 0) {
                                        //Today Set time passed, count to tomorrow
                                        calSet.add(Calendar.DATE,7);

                                    }



                            System.out.println("set time for alarmweekly==="+calSet.getTime());
                            AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
                            PendingIntent alarmPI = PendingIntent.getBroadcast(this, (int) insertedId+selectedDays.get(i), alarmIntent,  0);

                            alarmManager.set(AlarmManager.RTC_WAKEUP, calSet.getTimeInMillis(), alarmPI);

                            alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,
                                    calSet.getTimeInMillis(), (DateUtils.DAY_IN_MILLIS) * 7,
                                    alarmPI);
}

Comments

[Dhruvil Patel]

Yes, using the same PendingIntent was replacing my previous alarm, I rectified that. But this didn't solve my other issue: today's alarm is not triggering.

[Dhruvil Patel]

Thanks for the reply. Yes, I am doing the same thing what you suggested. But stillthe alarm manager is skipping today's (or current week's) alarm.

[GVillani82]

@DroidHive can you show me the code that you are using for scheduling the two alarms?

[Oiproks]

Hey @DhruvilPatel did you solve your problem? I'm having the same issue with the manager skipping today's alarm.