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Repeating alarm not triggering in android at every 12 am daily

I am using the following code to set a repeating alarm in android to trigger at every 12am but it not getting trigger even at one.
I need this alarm to trigger from next day 12 am hence I added one date in calendar object.
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 00);
calendar.set(Calendar.MINUTE,00);
calendar.set(Calendar.SECOND,00);
calendar.add(Calendar.DATE,1);
Utils.printLog("date from repeating alarm "+calendar.getTime());
Intent startIntent = new Intent(context, RepeatingAlarmReceiver.class);
PendingIntent startPIntent = PendingIntent.getBroadcast(context, 15, startIntent, 0);
AlarmManager alarmMgr = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
if (alarmMgr != null) {
alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),AlarmManager.INTERVAL_DAY, startPIntent);
}
I tested by breakpoint and found that alarmMgr is not null on setting it.
Also the RepeatingAlarmReceiver.class is working.

Alarm Manager with 2 pending intents only 1 works?

I have 2 alarms set, one for notifications, and the other one to do some tasks. My problem is that only one alarm seems to work( the notifications service one, the first alarm set). The Other alarm never goes off. Here is my code :
Intent myIntent1 = new Intent(getApplicationContext(), NotificationService.class);
PendingIntent pendingIntent = PendingIntent.getService(getApplicationContext(), 0, myIntent1, 0);
AlarmManager alarmManager1 = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
Calendar calendar1 = Calendar.getInstance();
calendar1.setTimeInMillis(System.currentTimeMillis());
long frequency1 = 30 * 1000; // in ms
alarmManager1.setRepeating(AlarmManager.RTC_WAKEUP, calendar1.getTimeInMillis(), frequency1, pendingIntent);
// Set alarm to fire go to Next day everyday at the same time
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, 14); // For 1 PM or 2 PM
calendar.set(Calendar.MINUTE, 57);
calendar.setTimeInMillis(System.currentTimeMillis());
Intent myintent = new Intent(getApplicationContext(), AlarmNextDayService.class);
AlarmManager alarmManager = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
PendingIntent pi = PendingIntent.getService(getApplicationContext(), 11, myintent,0 );
alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),AlarmManager.INTERVAL_DAY, pi);
Any suggestions are welcome. I have looked atother sources as well nothing works for me till now.
I have also added alarm permisison in the manifest file as the following :
<uses-permission android:name="com.android.alarm.permission.SET_ALARM"/>
Thank you

Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, 14); // For 1 PM or 2 PM
calendar.set(Calendar.MINUTE, 57);
calendar.setTimeInMillis(System.currentTimeMillis());
You are setting the HOUR_OF_DAY and the MINUTE but them you override that by calling setTimeInMillis(System.currentTimeMillis());
After that you set the alarm with the calendar.getTimeMillis() value which is already in the past, so the alarm is cancelled I think.

You're most likely seeing an issue because a Service is not guaranteed to run when triggered by an alarm, due to power save. If your device is on battery and idle when that alarm goes off, it will not trigger until the next time the device is full on or on AC power. You'll need to use a BroadcastReceiver which holds a wake lock which is then released by the Service when it is done. The WakefulBroadcastReceiver makes this a little easier to handle. This article will help provide more details.

alarm goes off as soon as i set it,please help me to remove it...?

here is a scenario:
suppose today right now the time is 9 am in the morning....
i set the alarm for 6 am daily,(note that the alarm time 6 am <9 am)
this is what happens
1 the alarm rings as soon as i set it(not required,i think that is because 6am <9am and hence the alarm rings for that day itslef as 6 am has already passed )
2 the alarm goes off for the next days too (required)
so how can i stop 1 to happen ???
here is the code i am using
Calendar calendar = Calendar.getInstance();
// 9 AM
calendar.set(Calendar.HOUR_OF_DAY, xhour);
calendar.set(Calendar.MINUTE, minutes);
calendar.set(Calendar.SECOND, 0);
PendingIntent pi = PendingIntent.getBroadcast(Reminder.this, 0,
intent,PendingIntent.FLAG_CANCEL_CURRENT);
AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
am.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
AlarmManager.INTERVAL_DAY, pi);

Can you please try this:
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, xhour);
calendar.set(Calendar.MINUTE, minutes);
alarmMgr.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
AlarmManager.INTERVAL_DAY, alarmIntent);

Alarm gets trigger randomly but not daily

The below code triggers alarm randomly at any time, but I want to trigger it only at 8 AM and daily.
What I am missing, please help. Thanks in advance.
Intent alarmIntent = new Intent(context, NotifyingDailyService.class);
PendingIntent alarmPIntent = PendingIntent.getService(context, 0, alarmIntent, 0);
// Set the alarm to start at approximately 8:00 a.m.
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 8);
calendar.set(Calendar.MINUTE, 0);
AlarmManager alarmMgr= (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
alarmMgr.cancel(alarmPIntent);
alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY, alarmPIntent);

I believe AlarmManager.INTERVAL_DAY is only appropriate for calls to setInexactRepeating(). I think you need to change AlarmManager.INTERVAL_DAY to the number of milliseconds in a day.
INTERVAL_DAY DOCUMENTATION
http://developer.android.com/reference/android/app/AlarmManager.html#INTERVAL_DAY
ALARM MANAGER EXAMPLE
Android: How to repeat a service with AlarmManager every 15 minutes, but only run from 8:00AM to 18:00PM?

I solved the question myself by using broadcast rather than service.
Intent alarmIntent = new Intent(context, DailyNotificationAlarmReceiver.class);
PendingIntent alarmPIntent = PendingIntent.getBroadcast(context, 0, alarmIntent, 0);
// Set the alarm to start at approximately 8:00 a.m.
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 8);
calendar.set(Calendar.MINUTE, 0);
//System.out.println("Alarm set at 8 clock");
Toast.makeText(context, "Alarm set at 8 clock", Toast.LENGTH_LONG).show();
AlarmManager alarmMgr= (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
// With setInexactRepeating(), you have to use one of the AlarmManager interval
// constants--in this case, AlarmManager.INTERVAL_DAY.
alarmMgr.cancel(alarmPIntent);
//alarmMgr.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), alarmPIntent);
//alarmMgr.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),calendar.getTimeInMillis()+ DateUtils.DAY_IN_MILLIS, alarmPIntent);
alarmMgr.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),AlarmManager.INTERVAL_DAY, alarmPIntent);

How do I register the AlarmManager to repeat selected days?

I'm creating an alarm application.
In my application, the user can select the days to fire the alarm, such as Sunday, Monday, so I used the Calendar class and AlarmManager to register multiple alarms.
If the selected day or days are less than the current day of the week, the alarm fires immediately.
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.DAY_OF_WEEK, getDayint); //sunday = 1
calendar.set(calendar.HOUR_OF_DAY, gethour);
calendar.set(calendar.MINUTE, getmin);
calendar.set(calendar.SECOND, 0);
calendar.set(calendar.MILLISECOND, 0);
long TIM = calendar.getTimeInMillis();
Intent intent = new Intent(MainActivity.this, AlarmReceiver.class);
PendingIntent sender = PendingIntent.getBroadcast(MainActivity.this, 0, intent,PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP, TIM, sender);
//repeat weekly
am.setRepeating(am.RTC,TIM, AlarmManager.INTERVAL_DAY*7, sender);

By using PendingIntent.FLAG_UPDATE_CURRENT you say that you like to have only one such alarm - so latest one wins - only one alarm weekly. And if TIM lies in past, alarm is fired immediately ( and then repeating ) So far - everything works as designed.
You may check whether TIM ( by the way, it is variable, and concention is that they shall be not uppercased like constants ) is less than System.currentTimeMillis() and add one week to it in this case