Develop Reference

AlarmManager use setExactAndAllowWhileIdle so it repeats

I have an app that uses an AlarmManager to schedule a service to repeat at a set frequency, say every hour.
From Android 6, devices will drop into Doze mode, this mode ignores wakelock and Alarms, potentially running them in the maintenance window. I would prefer that the Alarm executes when it is scheduled even if the device is in low-power idle modes.
I understand i can use setExactAndAllowWhileIdle to execute the alarm in Doze but this will excute only once. I cannot see any method that has this functionality but will repeat at a set frequency.
for example i use the code below to fire an alarm every hour. Is there a way to use setExactAndAllowWhileIdle so it repeats?
// get a Calendar object with current time
Calendar cal2 = Calendar.getInstance();
// add 5 minutes to the calendar object
cal2.add(Calendar.MINUTE, 1);
Intent intentTracking = new Intent(getApplicationContext(), TrackingAlarmReceiver.class);
// In reality, you would want to have a static variable for the request code instead of 192837
PendingIntent sender3 = PendingIntent.getBroadcast(getApplicationContext(), 192839, intentTracking, PendingIntent.FLAG_UPDATE_CURRENT);
// Get the AlarmManager service
AlarmManager am3 = (AlarmManager) getSystemService(ALARM_SERVICE);
//am.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), sender);
am3.setRepeating(AlarmManager.RTC_WAKEUP, cal2.getTimeInMillis(), ((Integer.parseInt(carerTrackingInteval)) * 60000 ), sender3);

ADM is spot-on.
As part of the work in TrackingAlarmReceiver, you call setExactAndAllowWhileIdle() to schedule the next bit of work.
Bear in mind that the minimum granularity of such events is ~10 minutes IIRC, and that you may not have network access even though you get control.

How to set android alarm to trigger until an specific date

I'm new to android and using alarmManager and I was wondering if there is a way to set an alarm in android that triggers for example every monday until a certain specific date. Like this :
Start date 10/09/15
Remind me something every monday at 2:30 pm
Until
End date 11/09/15

AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, 14);
calendar.set(Calendar.MINUTE, 30);
int weekInMillis = 7 * 24 * 60 * 60 * 1000;
alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
weekInMillis, PendingIntent.getBroadcast(context, 0, new Intent(context, ReminderAlarmWakefulBroadcastReceiver.class), PendingIntent.FLAG_UPDATE_CURRENT));
Above code snippet sets an alarm for 2:30 PM that repeats itself every week. Tweak calendar for varying the time at which the alarm goes off. For example, the coming Monday.
When the alarm goes off, it sends a broadcast which will be received by ReminderWakefulBroadcastReceiver, a custom receiver containing the code that you want to run every Monday at 2:30 PM. This code should also check whether it is time to cancel the alarm and if it is, the following code cancels it:
AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
alarmManager.cancel(PendingIntent.getBroadcast(context, 0, new Intent(context, ReminderAlarmWakefulBroadcastReceiver.class));
References:
AlarmManager, Scheduling Repeating Alarms, PendingIntent

If you know how to setup an Alarm, the solution is quite simple:
1) At the time you setup the Alarm, calculate the maximum timestamp you want it to run, and save it as a local preference.
2) Then in the Alarm code itself, each time it is triggered you can make a first test to see if the current timestamp is before or after your limit preference saved at first time.
3) If reached, then cancel the Alarm as #karthik said. If not, keep your code going...

Alarm SET OFF AND ON in Android

I am creating a clock application that has alarm feature too. The time is showing up properly and I am also setting multiple alarm properly.
I am creating multiple alarm using different id and also saving the same into Database so that I can view the list of alarms in a listview. Now I am trying to set ON and OFF functionality for my alarm. I have a problem there.
On itemclick if alarm is ON it switches OFF with the help of:
Intent intent = new Intent(Main.this,TaskRecieverForAlarm.class);
PendingIntent pi = PendingIntent.getBroadcast(Main.this, Integer.parseInt(cont[0]), intent, 0);
AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
am.cancel(pi);
The above code cancels the alarms perfectly fine.
To switch ON the alarm I am using:
Intent intent = new Intent(Main.this, TaskRecieverForAlarm.class);
intent.putExtra("AlarmDate", cont[1]);
intent.putExtra("key", Integer.parseInt(cont[0]));
PendingIntent sender = PendingIntent.getBroadcast(Main.this, Integer.parseInt(cont[0]) , intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
if(type.equalsIgnoreCase("daily"))
{
am.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), sender);
am.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 1440*60000 ,sender);
}
else if(type.equalsIgnoreCase("weekly"))
{
am.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), sender); am.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 7*1440*60000 ,sender);
}
Now as soon as I click the OFF to ON, alarm triggers and calls the TASKReceiverFORAlarm (broadcast receiver) even though the alarm time is 4 or 5 hours from the current time. I am not sure where I am going wrong?
Can somebody help me out?
Thanks!

I think I found the answer here:
public void setRepeating (int type, long triggerAtMillis, long intervalMillis, PendingIntent operation)
Added in API level 1
Schedule a repeating alarm. Note: for timing operations (ticks, timeouts, etc) it is easier and much more efficient to use Handler. If there is already an alarm scheduled for the same IntentSender, it will first be canceled.
Like set(int, long, PendingIntent), except you can also supply a rate at which the alarm will repeat. This alarm continues repeating until explicitly removed with cancel(PendingIntent). If the time occurs in the past, the alarm will be triggered immediately, with an alarm count depending on how far in the past the trigger time is relative to the repeat interval.
If an alarm is delayed (by system sleep, for example, for non _WAKEUP alarm types), a skipped repeat will be delivered as soon as possible. After that, future alarms will be delivered according to the original schedule; they do not drift over time. For example, if you have set a recurring alarm for the top of every hour but the phone was asleep from 7:45 until 8:45, an alarm will be sent as soon as the phone awakens, then the next alarm will be sent at 9:00.
If your application wants to allow the delivery times to drift in order to guarantee that at least a certain time interval always elapses between alarms, then the approach to take is to use one-time alarms, scheduling the next one yourself when handling each alarm delivery.
Parameters
type One of ELAPSED_REALTIME, ELAPSED_REALTIME_WAKEUP}, RTC or RTC_WAKEUP.
triggerAtMillis time in milliseconds that the alarm should first go off, using the appropriate clock (depending on the alarm type).
intervalMillis interval in milliseconds between subsequent repeats of the alarm.
operation Action to perform when the alarm goes off; typically comes from IntentSender.getBroadcast().
The way you use that function is:
am.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 1440*60000 ,sender);
Try this one:
//The only variable here is the desired hour of the alarm, which
// has to be obtained in milliseconds
long alarmSetAt = // The hour of the Alarm for the current date in milliseconds
long time = cal.getTimeInMillis() - alarmSetAt;
if(time > 0){
time = -time + cal.getTimeInMillis();
}
else{
time = time + cal.getTimeInMillis() + 1440*60000;
}
am.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 1440*60000 ,sender);

How to call receiver one a hour?

Is it possible to call receiver only on start of every new hour? I have running service and I need to call receiver only when the time changes from for example: five o'clock to six o'clock, etc.? Is there any way how can I do it?

You will need to use an AlarmManager. Then schedule the times you want it to notify you. Google for more examples.
UPDATE:
What you can do is wake it up at the next hour, at 8.00 if time is 7.30 . Then shedule it for an hourly wake up the next time it starts.
Calendar c = Calendar.getInstance();
c.set(Calendar.HOUR,c.get(Calendar.HOUR)+1);
c.getTimeInMillis(); // use this in alarmmanager for the first time, 60*60*1000 from next time

You can use a combination of GregorianCalendar and an AlarmManager for this. You basically add 1 hour to the current time and then round downwards to the nearest hour. See an example here:
long UPDATE_INTERVAL = 60 * 60 * 1000; // 1 hour in milliseconds.
Calendar c = new GregorianCalendar(); // Get current time
c.add(Calendar.HOUR_OF_DAY, 1); // Add one hour to the current time.
// Set minutes, second, millisecond to 0, such that we ensure that an update is done
// at the end of the hour.
c.set(Calendar.MINUTE, 0);
c.set(Calendar.SECOND, 0);
c.set(Calendar.MILLISECOND, 0);
final AlarmManager alarm = (AlarmManager) context.getSystemService(ALARM_SERVICE);
// Set an alarm, starting from the end of the current hour, every hour, to execute
// the update service.
// pIntent is the pending intent you would like activate.
alarm.setRepeating(AlarmManager.RTC, c.getTimeInMillis(), UPDATE_INTERVAL, pIntent);
I assume you know how to call the receiver.

Have a repeating alarm start thirty seconds once started then once a day afterward in Android

I have set up an alarm to run a service to grab events from the internet. The following is how I implemented it however it seems to run immediately and not delay the alarm at all.
AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
am.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,
SystemClock.currentThreadTimeMillis()+30000, AlarmManager.INTERVAL_DAY, newsAlarm);

Check the AlarmManager documentation, I think you might want to use:
am.setRepeating(AlarmManager.RTC_WAKEUP,
System.currentTimeMillis()+30000, AlarmManager.INTERVAL_DAY, newsAlarm);

I think you want SystemClock.currentTimeMillis(), not currentThreadTimeMillis() The thread time is the number of millis since the thread was created. I think you want a real time in this context.