Recently I noticed strange behaviour when i tried to schedule Activities to be run in the future using AlarmManager. Look at the code below, the first activity is started in 20 seconds, while the second activity is not started in 40 seconds instead it is started only after 60 seconds. Can anyone explain why the second intent doesn't schedule the second activity to be called instead the third intent does. Does this mean that i can have only one intent for an activity in the AlarmManager.
//pending intent for morning
Intent myIntent1 = new Intent(this, Activity1.class);
pendingIntent1 = PendingIntent.getActivity(this, 0, myIntent1, 0);
AlarmManager alarmManager1 = (AlarmManager)getSystemService(ALARM_SERVICE);
Calendar calendar1 = Calendar.getInstance();
//calendar1.set(Calendar.YEAR, Calendar.MONTH + 1, Calendar.DAY_OF_MONTH, morningTime, 0, 0);
calendar1.setTimeInMillis(System.currentTimeMillis());
calendar1.add(Calendar.SECOND, 20);
alarmManager1.set(AlarmManager.RTC_WAKEUP, calendar1.getTimeInMillis(), pendingIntent1);
//pending intent for noon
Intent myIntent2 = new Intent(this, Activity2.class);
pendingIntent2 = PendingIntent.getActivity(this, 0, myIntent2, 0);
AlarmManager alarmManager2 = (AlarmManager)getSystemService(ALARM_SERVICE);
Calendar calendar2 = Calendar.getInstance();
//calendar2.set(Calendar.YEAR, Calendar.MONTH + 1, Calendar.DAY_OF_MONTH, noonTime, 0, 0);
calendar2.setTimeInMillis(System.currentTimeMillis());
calendar2.add(Calendar.SECOND, 40);
alarmManager2.set(AlarmManager.RTC_WAKEUP, calendar2.getTimeInMillis(), pendingIntent2);
//pending intent for night
Intent myIntent = new Intent(this, Activity2.class);
pendingIntent = PendingIntent.getActivity(this, 0, myIntent, 0);
AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
Calendar calendar = Calendar.getInstance();
//calendar.set(Calendar.YEAR, Calendar.MONTH + 1, Calendar.DAY_OF_MONTH, nightTime, 0, 0);
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.add(Calendar.SECOND, 60);
alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);'
No, but it means that you need distinct
PendingIntents
. You are calling:twice, and therefore the two
getActivity()
calls are returning the samePendingIntent
.Either:
Use a different value for the 2nd parameter to
getActivity()
, orDo something to the
Intent
objects to make them sufficiently different, such as using different action strings (note: extras are not sufficient)