Develop Reference

Scheduling alarms with Android 4.0 and latest versions

I've been using the following code to schedule many alarms on Android 3.0 and previous versions. It worked fine, But the 4.0 and later versions won't work with it (yes .. alarms notifications won't popup). The alarms won't set. At the day and time programmed nothing happens... the notification never pops up =(
Would you suggest any modification? Thank you!
private void setNotification(int phour, int pminute) {
Calendar cal = Calendar.getInstance();
Calendar now = Calendar.getInstance();
long when = 0;
// Get the AlarmManager service
AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
Intent notificationIntent = new Intent(this, ReceberAlarme.class);
notificationIntent.addCategory("android.intent.category.DEFAULT");
notificationIntent.putExtra("eventName",
getResources().getString(R.string.app_name));
notificationIntent.putExtra("eventDescription",getResources().getString(R.string.notification_phrase));
long repeatTime=0;
notificationIntent.putExtra("Flag",true);
repeatTime=(AlarmManager.INTERVAL_DAY);
cal.set(Calendar.HOUR_OF_DAY,thour);
cal.set(Calendar.MINUTE,tminute);
cal.set(Calendar.SECOND,0);
if(now.after(cal)){
//log.d("Notice", "Added a day");
cal.add(Calendar.DATE, 1);
}
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
// Delete old alarms
am.cancel(pendingIntent);
// Schedule alarms
am.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), repeatTime, pendingIntent);
}
}

AlarmManager in Lollipop runs only after Reboot

In my app, I have an AlarmManager set up that runs every 5 mins, triggering a service. However I find that in Lollipop phones, it works only after I reboot the phone. If I do not reboot the phone, the AlarmManager never runs. Please let me know if you might be able to help me out with some hints. Appreciate your help.
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.add(Calendar.SECOND, 120);
Intent intentAlarm = new Intent(appContext, CheckConnReceiver.class);
PendingIntent pendingIntent
= PendingIntent.getBroadcast(appContext, 0, intentAlarm, PendingIntent.FLAG_UPDATE_CURRENT);
// create the object
AlarmManager alarmManager = (AlarmManager) appContext.getSystemService(Context.ALARM_SERVICE);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,
calendar.getTimeInMillis(), 300000, pendingIntent);

How to start a service at a specific time

Am creating an application that fetch data from webservice. I have been while(true) and sleeping the loop at a specific milliseconds.. i had like to make the service action(fetching data from webservice) to always start at a specific time.. instead on being on always and pausing by Thread.sleep(milli)... Thanks
this is what have been using
while(true)
{
///pullDataFromWebservice();
Thread.sleep(600000);
}

Use the Alarm API. It is way safer than having a sleep & poll service.
Why?
Because Android is very likely to reclaim such a long running services when resources turn low, resulting
in your delayed logic never being called!
An example for activating a callback in 1 hour from now:
private PendingIntent pIntent;
AlarmManager manager = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(context, MyDelayedReceiver.class); <------- the receiver to be activated
pIntent = PendingIntent.getBroadcast(context, 0, intent, 0);
manager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,
SystemClock.elapsedRealtime() +
60*60*1000, pIntent); <---------- activation interval

Try using AlarmManager - A bit battery eater though
AlarmManager alarmMgr = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(this, YourClass.class);
PendingIntent pIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
Calendar cal= Calendar.getInstance();
cal.set(Calendar.HOUR_OF_DAY, 19);
cal.set(Calendar.MINUTE, 20);
cal.set(Calendar.SECOND, 0);
alarmMgr.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pIntent);
//RTC_WAKEUP to enable this alarm even in switched off mode.

Scheduled alarms are not firing properly

My application schedules multiple alarms for particular times. These alarms are scheduled when the application starts. (For each day there are 5 alarms resulting in 35 alarms per week)...
I have verified through logs that these alarms are scheduled when the application starts.
The problem is when I started testing my application the 7 alarms goes off perfectly fine. However the 8th alarm doesn't fired. I have tested this scenario by keeping my device still for more than 1 day. How can I debug this behaviour and what are the possible reasons that prevent alarm for firing.
Edit:
Code for scheduling:
try {
if (info != null) {
Calendar c = Calendar.getInstance();
c.set(Calendar.YEAR, year);
c.set(Calendar.MONTH, month);
c.set(Calendar.DAY_OF_MONTH, day);
c.set(Calendar.HOUR_OF_DAY, info.getHour());
c.set(Calendar.MINUTE, info.getMinute());
c.set(Calendar.SECOND, 0);
Intent intent = new Intent(context, AlarmReceiverActivity.class);
intent.putExtra("name", info.getPrayerName());
intent.putExtra("sound", soundType);
intent.putExtra("time", formatTimeClock(context, info.getHour(), info.getMinute()));
PendingIntent pendingIntent = PendingIntent.getActivity(context, alarmId, intent, PendingIntent.FLAG_CANCEL_CURRENT);
AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(), pendingIntent);
}
} catch (Exception e) {
Log.e("ALarmSchedularManager", e.getMessage());
}

How can I debug this behaviour
Use adb shell dumpsys alarm to see what your scheduled alarms are and when they are next to be invoked.
what are the possible reasons that prevent alarm for firing
Your code does not appear take into account the possibility that the time has already passed, though that may be handled outside the code snippet you show above.

Hopefully below code will help, I used the same in my app. Here the argument passed in AlarmManager class for repeating should be 24*60*60*1000
AlarmManager am = (AlarmManager) ct.getSystemService(Context.ALARM_SERVICE);
Intent intent1 = new Intent(ct, TimeAlarm.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(ct, 0,intent1, PendingIntent.FLAG_CANCEL_CURRENT);
Date curr=new Date();
curr.setHours(h);
curr.setMinutes(m);
c.setTime(curr);
c.set(Calendar.SECOND, 0);
Calendar c1 = Calendar.getInstance();
am.setRepeating(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(),24*60*60*1000, pendingIntent);
instead of hard code manipulation (24*60*60*1000) you can use AlarmManager.INTERVAL_DAY. Check this for different interval upto 1 day http://developer.android.com/reference/android/app/AlarmManager.html#INTERVAL_DAY

How to set phone's alarm from program code in Android

I want to set phones alarm in phone.
Can anybody say how to do that?
I got the code from net, and try but the alram not set to phone.
Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(System.currentTimeMillis());
Intent activate = new Intent(this, Alaram.class);
AlarmManager alarams ;
PendingIntent alarmIntent = PendingIntent.getBroadcast(this, 0, activate, 0);
alarams = (AlarmManager) getSystemService(ALARM_SERVICE);
alarams.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), alarmIntent);
In this code we are provide intent as Alaram.class.
Then what should be written in this Alram.class so that alarm will set to the mobile.

I think you misunderstood what the AlarmManager is good for. It starts your code on a given Point, it doesn't set the phones ring tone.
If you want to set the Phones Alarm sound, this might be helpful (from the standard Android Music Player):
// Set the system setting to make this the current ringtone
MusicUtils.setRingtone(this, mService.getAudioId());

You are setting alarm time as current time in millisecond it will be exceed when the alarmmanager wake up....So,here i modified your code.check this it will work.That alaram will start after 5 seconds...i mean your Alaram activity will start within 5 seconds.
Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(System.currentTimeMillis());
Intent activate = new Intent(this, Alaram.class);
AlarmManager alarams ;
PendingIntent alarmIntent = PendingIntent.getBroadcast(this, 0, activate, 0);
alarams = (AlarmManager) getSystemService(ALARM_SERVICE);
alarams.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis()+5000, alarmIntent);