I had created alarm manager which invoke after 2 minutes which I want. But currently, i'm not able to set it more than 20 seconds. if I set for 20 seconds it returns output but if I set it for more than 20 I'm not able to set. I want to set it for 2 minutes. kindly help me.
I had added alarm fire code
AlarmManager manager = (AlarmManager) ContextGetter.getContext().getSystemService(Context.ALARM_SERVICE);
Intent intnt = new Intent(ContextGetter.getContext(), AlarmBroadcastReceiver.class);
intnt.setAction("com.demo.alarmEvent");
PendingIntent pending = PendingIntent.getBroadcast(ContextGetter.getContext(), 0, intnt, 0);
manager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()+ 30*1000, pending);
kindly help me
i want it set it only once.
I also tried with this one.
AlarmManager manager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Intent intnt = new Intent(EnterSysNumber.getInstance(), AlarmReceiver.class);
intnt.setAction("com.demo.Enter_number");
PendingIntent pending = PendingIntent.getBroadcast(getApplicationContext(), 0, intnt, 0);
manager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 120000, pending);
In Android N you'll run into Doze mode. Doze is a deep sleep mode to save battery power. It will prevent your service to preserve battery power.
AlarmManager and using setExactAndAllowWhileIdle when in low-power idle modes this duration may be significantly longer, such as 15 minutes.. But this is NOT suggested for any Play Store app, you will kill your user's battery.
Related
I am trying to create an App.. I used Alarm manager to run in every 1 minute so that it could run a AlarmReciever and can do a network task and Updating UI from Background.. Alarm Manager is firing in Activity.. I Just want to know will it affect battery by doing so? Also Like to know whether everytime i opened the activity will the AlarmManager will trigger. If so how can i tackle that situation..
I searched Everywhere most of the solution is to do AlarmManager rather than service as it will trigger even if app is killed..
My AlarmManager Code:
Calendar cur_cal = new GregorianCalendar();
cur_cal.setTimeInMillis(System.currentTimeMillis());
AlarmManager alarmManager = (AlarmManager) this.context.getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(this.context, AlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this.context, 0, intent, 0);
alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, cur_cal.getTimeInMillis(), 60 * 1000, pendingIntent);
I need my alarm to fire every 30 seconds - exactly as possible (+/-3 seconds). So I read this (official Android guide) and implemented this:
AlarmManager alarm = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(context, MyService.class);
PendingIntent pendingIntent = PendingIntent.getService(context, 0, intent, 0);
alarm.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 30000, pendingIntent);
Result: The Alarm fires +/- every 50 seconds, which is not so much accurate if I gave interval of 30 seconds.
Where is the problem and what's going on here? In the documentation they say things about be careful with exact timers since cpu & battery consuming etc. but nevertheless still there is an option for exact if I want, and this is what I thought I implemented.
try this:
alarm.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + (2 * 1000), (30 * 1000), pendingIntent);
change delay 2 or up seconds for start alarm on firt time.
We are using following code for repeating task:
Intent alarmIntent = new Intent(MainActivity.this, TestReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(MainActivity.this, 0, alarmIntent, 0);
AlarmManager manager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
int interval=15000;
manager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), interval, pendingIntent);
Will this drains battery?
I suggest you to read:
Scheduling Repeating Alarms
Here you'll find all your answers!
The sort answer "no". The waiting alarm feature doesn't consume the battery.
But, obviously, if the interval is about several seconds the device will consume battary (if you try to call very often). In other cases this is the best way to do the work. If you want to recall the service namely 15 seconds and calculations are huge the devices will never sleep. In this case this will consume.
I'm attempting to use AlarmManager to schedule a delayed check in my app. (Specifically, N minutes after a user approaches a location, I want to check whether they're still there, and if so send them a notification.)
I've implemented this by checking to see whether they've entered the region in my location update receiver and, if they have, scheduling like so:
Intent geofenceIntent = new Intent(context, GeofenceReceiver.class)
// ...intent contents not important...
PendingIntent pi = PendingIntent.getBroadcast(context, 0, geofenceIntent, PendingIntent.FLAG_UPDATE_CURRENT);
Calendar c = Calendar.getInstance();
c.add(Calendar.SECOND, getGeofenceDelaySeconds());
AlarmManager alarmManager = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(), pi);
Log.v("Scheduling notification check for "+c.getTime());
When the battery level is high (say, 50%), everything works like a charm. But when it's low (say, 10%), I get location updates, they schedule the alarm seemingly-successfully, but that alarm never actually triggers!
What gives? Does Android stop sending certain types of updates when it's trying to conserve power? How can I work around this (short of actually keeping my app active for the duration of the delay, which causes obvious issues with battery life)?
It turns out that this is related to the use of the real-time clock.
Although I could not find the documentation it quotes (it's not in AlarmManager), this StackOverflow answer suggests that AlarmManager.RTC_WAKEUP alarms do not trigger if the phone is in power-saving mode. AlarmManager.ELAPSED_REALTIME_WAKEUP alarms do not seem to suffer this problem, so I was able to fix the issue by switching to:
Intent geofenceIntent = new Intent(context, GeofenceReceiver.class)
// ...intent contents not important...
PendingIntent pi = PendingIntent.getBroadcast(context, 0, geofenceIntent, PendingIntent.FLAG_UPDATE_CURRENT);
long millis = SystemClock.elapsedRealtime() + 1000 * getGeofenceDelaySeconds();
AlarmManager alarmManager = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, millis, pi);
I have one problem I need to set AlarmReceiver.
I am using this code for it:
Calendar cal = Calendar.getInstance();
cal.set(Calendar.SECOND, cal.get(Calendar.SECOND) + 5);
AlarmManager alarm = (AlarmManager)getActivity().getSystemService(Context.ALARM_SERVICE);
Intent i = new Intent(getActivity(), AlarmReceiver.class);
PendingIntent pIntent = PendingIntent.getBroadcast(getActivity(), 0, i, 0);
alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 1000*5, pIntent);
So it means that this AlarmManager will call AlarmReceiver every 5 seconds, but problem is that if I don't turn my screen OFF manually, screen will stay ON and this is not what I want.
From the AlarmManager reference documents:
The parameter AlarmManager.RTC_WAKEUP, will wake up the device (in case of device sleep) to deliver the Alarm. You may use AlarmManager.RTC but that won't be wake up the device and your Alarm won't be delivered until next time device wakes up.
A better option would be to use a Service for this purpose, as they are designed to carry out the background tasks.