AlarmManager at specific dates and times

Question

I would like to show a dialog at a specific date and time (12/25/2012 at 12.00), and I use this code. I set 11 months (because 0 is the gene), but the alarm does not start. What is my mistake?

Calendar cal=Calendar.getInstance();
    cal.set(Calendar.MONTH,11);
    cal.set(Calendar.YEAR,2012);
    cal.set(Calendar.DAY_OF_MONTH,25);
    cal.set(Calendar.HOUR_OF_DAY,12);
    cal.set(Calendar.MINUTE,00);
    cal.set(Calendar.SECOND,0);

Intent _myIntent = new Intent(context, Notify.class);
    PendingIntent _myPendingIntent = PendingIntent.getBroadcast(context, 123, _myIntent, PendingIntent.FLAG_UPDATE_CURRENT|  Intent.FILL_IN_DATA);

AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), _myPendingIntent);  

Answer 1

See below for code on how I will set my alarm for the month of December:

// for Alarm 25/12/2012 at 12.00   
Calendar myAlarmDate = Calendar.getInstance();
myAlarmDate.setTimeInMillis(System.currentTimeMillis());
myAlarmDate.set(2012, 11, 25, 12, 00, 0);
AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);

Intent _myIntent = new Intent(context, AlarmReceiverNotificationForEveryMonth.class);
_myIntent.putExtra("MyMessage","HERE I AM PASSING THEPERTICULAR MESSAGE WHICH SHOULD BE SHOW ON RECEIVER OF ALARM");
PendingIntent _myPendingIntent = PendingIntent.getBroadcast(context, 123, _myIntent, PendingIntent.FLAG_UPDATE_CURRENT);
alarmManager.set(AlarmManager.RTC_WAKEUP, myAlarmDate.getTimeInMillis(),_myPendingIntent);

You can update the above code with your intentions and class, and you will get your wish.

Hope this helps you.