Develop Reference

Android - Alarm manager runs every day

I don't understand what's wrong but my alarm runs every single day even if I hardcode the day number, I have no idea whats going on...
Intent notificationIntent = new Intent(AddTask.this,CustomBroadcastReceiver.class);
notificationIntent.putExtra(Intent.EXTRA_UID,newTaskId);
PendingIntent pendingIntent = PendingIntent.getBroadcast(AddTask.this, newTaskId, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager)getSystemService(getApplicationContext().ALARM_SERVICE);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, hour);
calendar.set(Calendar.MINUTE, minute);
calendar.set(Calendar.DAY_OF_WEEK,2);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),AlarmManager.INTERVAL_DAY * 7, pendingIntent);
today is sunday so the day number is 1 and i wrote calendar.set(Calendar.DAY_OF_WEEK,2); and the alarm just got trigered since i used the time and minute of this moment... it doesnot matter if i set the day number 1 2 3 4 5 or 6 or even if i make several alarm managers with same ID and each contains other day it triggers every day

Why is this line necessary?
calendar.setTimeInMillis(System.currentTimeMillis());
Also, the android development documentation recommends using
setInexactRepeating(int type, long triggerAtMillis, long intervalMillis, PendingIntent operation);
EDIT:
I suspect the intent isn't set for creating alarms so it's not creating the alarms correctly.
Maybe this would work:
Intent intent = new Intent(this, AlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0,
intent, PendingIntent.FLAG_ONE_SHOT);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
//set repeating alarm here
I hope that answers the question.

So okay i have solved this , for everyone who want to create an alarm application like this > you set the time and hour and the days of week to trigger the alarm, it works like this : if today is the day which you choosed you just set the alarm with this :
calendar.set(Calendar.HOUR_OF_DAY, hour);
calendar.set(Calendar.MINUTE, minute);
but IF the day you picked is not the day which is today you have to the the date of the nearest day you picked and then just set the additional hour and minute as above.
this is the only way to make it work

Notification shows not in exact time

I know that this topic is explained fairly well and there are a lot of tutorials. But maybe I'm too new in android to understand what I'm doing wrong.
I need to implement support of set of reminders. And notification should be shown exactly every Monday at 15 pm. I checked a lot of tutorials and similar questions on this site but anyway notification shows, somehow, randomly.
How do I test implementation:
Current time is 14:55
I set reminder on Monday at 15:00
And right after SAVE notification is shown.
Because of (just for example) I set repeat period in 20 sec, this notification is shown again and again with delay of 20 sec. But current time is still between 14:55 and 15:00.
And my task is to run notification at 15:00 or a liitle later. But not before.
set repeating notification
AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(context, NotifyService.class);
PendingIntent pendingIntent = PendingIntent.getService(context, (int) reminder.id, intent, 0);
final Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.DAY_OF_WEEK, 2);
calendar.set(Calendar.HOUR_OF_DAY, reminder.time.hour);
calendar.set(Calendar.MINUTE, reminder.time.minute);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
am.setRepeating(AlarmManager.RTC_WAKEUP,
Calendar.getInstance().getTimeInMillis(), 20000, pendingIntent);
BTW
my min SDK version is 7, so I cannot use methods like setExact()
android version on tested device is 4.4.2
Thanks

When you set the alarm you set it with Calendar.getInstance().getTimeInMillis() instead of calendar.getTimeInMillis(). Simple bug ;).
Basically setting the alarm to 'now' every time, ignoring your calendar object.

Why does my AlarmManager trigger instantly?

I want the AlarmManager to repeat a task at scheduled time (weekly)
I used the following code:
for (Integer day : daysList) {
Calendar c = Calendar.getInstance();
c.set(Calendar.DAY_OF_WEEK, PersonalUtils.getDigitalWeek(day));
c.set(Calendar.HOUR_OF_DAY, task.getHour());
c.set(Calendar.MINUTE, task.getMinute());
c.set(Calendar.SECOND, 0);
c.set(Calendar.MILLISECOND, 0);
intent.putExtra("id", task.getId());
PendingIntent operation = PendingIntent.getService(
getApplicationContext(), requestCode, intent, 0);
alarm.setRepeating(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(),
AlarmManager.INTERVAL_DAY * 7, operation);
}
However the alarm it triggered prematurely.
For example: Assuming that it is 18:30 Wed now. I setup a task which should be triggered at 17:30 Tue next week but instead the alarm is triggered immediately
Can anybody tell me why?

You are trying to do an inexact alarm, which only allows for a few specific constants, INTERVAL_DAY, INTERVAL_FIFTEEN_MINUTES, etc. See Android Docs for more. Those constants are only supposed to be used for InexactRepeatingAlarms, but I see your doing a RepeatingAlarm.
You have a couple of choices, you can either set the alarm to trigger in exactly 1 week, or you can set it to trigger every day inexactly and only pay attention to it if the alarm occurs during the 7th day. To trigger exactly every 7 days from now, try this:
final long WEEK_IN_MILLIS= 604800000;
alarm.setRepeating(AlarmManager.RTC_WAKEUP, c.getTimeInMillis()+WEEK_IN_MILLIS,
WEEK_IN_MILLIS, operation);
Note that I set it to first trigger in 1 week, then repeat every week after that. That should work for you.

Repeating alarm is not working properly

I am developing an application that needs to fire an alarm after each 5 days, for that i am using setRepeating method,for example : today date is 16 so alarm should fire on 21 but for testing purpose, i changed my device date 16 to 17 and suddenly it fires alarm , however it should start alarm after 5 days, i am not able to find out what i am doing wrong. Please help me . Thanks in advance.
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
long check = 86400000; // no. of millisecond in days
int days = Integer.parseInt(strDays);
Intent intent = new Intent(getBaseContext(), AlarmReciever.class);
intent.putExtra("Item", "Time To Pick Up " + strItemName);
intent.putExtra("Id", 1);
PendingIntent pendingIntent = PendingIntent.getBroadcast(
getBaseContext(), RQS_1, intent, 0);
long time =check*2; // for 2 days
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,System.currentTimeMillis(),time,pendingIntent);

Read documentation of setRepeating
http://developer.android.com/reference/android/app/AlarmManager.html#setRepeating(int, long, long, android.app.PendingIntent)
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,System.currentTimeMillis(),time,pendingIntent);
Here System.currentTimeMillis() suggests that alarm should first go off instantaneously and then after 5 days.
triggerAtMillis time in milliseconds that the alarm should first go
off, using the appropriate clock (depending on the alarm type).

set irregular alarms daily using alarmManager

I want to set notifications/alarms everyday at specific times. Please note that these times could be different for everyday. For example I have a Database from which I get 5 different entries/times for a day e.g 6am, 1.30pm, 4.30pm, 7.30pm, 10.00 pm. I want to set an alarm for these times. For the next day these times could be different. They could be off by 2-5 minutes or more.
Basically I cannot set a recurring alarm for the same time everyday. I need to check the entry in my Database to know what time I should schedule it.
What is a good and efficient way of doing this. I looked at some stack overflow questions for setting multiple alarms. But here how do I do it? Should I just read the whole weeks database entries i.e 5 times/day for 7 days..And set around 35 alarms together? Or should I just set one alarm at a time. And when that alarm is fired just read the next entry from the Database and schedule an alarm for that time?

Write a service which will pick up the 5 values from the database everyday at a particular time.
Then add multiple entries in the AlarmManger with different unique ID.
Adding alarm at particular time:
Calendar calendar = Calendar.getInstance();
//9 AM
calendar.set(Calendar.HOUR_OF_DAY, 9);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
PendingIntent pi = PendingIntent.getService(context, 0, new Intent(context, YourClass.class), PendingIntent.FLAG_UPDATE_CURRENT);
am.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pi);
Setting Multiple alarm:
AlarmManager[] alarmManager=new AlarmManager[24];
intentArray = new ArrayList<PendingIntent>();
for(f=0;f<arr2.length;f++){
Intent intent = new Intent(AlarmR.this, Riciving.class);
pi=PendingIntent.getBroadcast(AlarmR.this, f,intent, 0);
alarmManager[f] = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager[f].set(AlarmManager.RTC_WAKEUP,arr2[f] ,pi);
intentArray.add(pi);
}
Hope this should work.