Develop Reference

Android Alarm manager to run a task on a specific time

I have read many articles, but non seems to work for me!
I have to schedule a repeating task with AlarmManager for everyday at 7:15. The following method is set in an activity and registered a broadcast receiver for it!
private void setTask(Context context) {
Calendar updateTime = Calendar.getInstance();
updateTime.setTimeZone(TimeZone.getTimeZone("GMT"));
updateTime.set(Calendar.HOUR_OF_DAY, 7);
updateTime.set(Calendar.MINUTE, 15);
Intent intent = new Intent(context, NotifyUpdate.class);
PendingIntent fireAlarm = PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarms = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarms.setRepeating(alarms.RTC_WAKEUP, updateTime.getTimeInMillis(), alarms.INTERVAL_DAY, fireAlarm);
}
The problem is when I run the app the method gets executed immediately regardless of the time set, but not executing at (7:15).
Any Idea?

Try this before setting alarm
Calendar now = Calendar.getInstance();
if (updateTime.before(now)) {
updateTime.add(Calendar.DAY_OF_MONTH, 1); // if its in the past increment
}
alarms.setRepeating(alarms.RTC_WAKEUP, updateTime.getTimeInMillis(), alarms.INTERVAL_DAY, fireAlarm);
You said that you have immediate triggering not depending on time. It's happening because updateTime-object references at time in the past, so the goal is to set an alarm to 7:15 in the future. This will help to avoid immediate triggering.

Background repeating task with onboot

Hello i want to make a background service to update the data of my app and repeat it once a day, also i want the service to start onboot. I have the following code:
public class OnBoot extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
// Create Intent
context.startService(new Intent(context, BackgroundServiceHandler.class));
}
}
I have a settings menu so the user can choose the hour of the repeating alarm.
How can i reset the time of the alarmmanager? Where i have to put the code of the alarm manager? Do i have to use service or intentservice? How to check if service is running?
Alarm manager code:
Intent intent = new Intent(MainActivity.this, AlarmService.class);
intent.putExtra("i", 3);
PendingIntent pi = PendingIntent.getService(MainActivity.this, 9, intent, 0);
// every day at 9 am
Calendar calendar = Calendar.getInstance();
// if it's after or equal 9 am schedule for next day
if (Calendar.getInstance().get(Calendar.HOUR_OF_DAY) >= 9) {
calendar.add(Calendar.DAY_OF_YEAR, 1); // add, not set!
}
calendar.set(Calendar.HOUR_OF_DAY, 9);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.setInexactRepeating(AlarmManager.RTC, calendar.getTimeInMillis(),
AlarmManager.INTERVAL_DAY, pi);

How can i reset the time of the alarmmanager?
How to edit/reset Alarm Manager?
Where i have to put the code of the alarm manager?
For example you can place that code in static method and call it from place where user set time and from OnBootReceiver. How to implement class which will receive event OnBoot please check that answer.
Do i have to use service or intentservice?
Service vs IntentService
How to check if service is running?
Check if service is running on Android?

How does setting repeating alarm affects on calling in the onCreate()

If I call the setinexactrepeating() alarm method in the onCreate , how does it affect the alarm which is being repeated at the specified interval
Here is the code of setting alarm, I am calling this method in the onCreate()
public void setAlarm()
{
Intent myintent=new Intent(this,AlarmReciever.class);
Random random = new Random();
int ran = random.nextInt(total_words.size());
String tempString=onlySearch(total_words.get(ran), 1);
myintent.putExtra("word", total_words.get(ran));
myintent.putExtra("meaning", tempString);
myintent.putExtra("language", 1);
alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
PendingIntent pendingIntent=PendingIntent.getBroadcast(this,101,myintent,PendingIntent.FLAG_UPDATE_CURRENT);
//NotificationTime is the sharedPreference file, in which i am storing hours and minute got from timepicker
alarmManager.cancel(pendingIntent);
Calendar calendar=Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, NotificationTime.getInt("hour", 12));
calendar.set(Calendar.MINUTE, NotificationTime.getInt("min", 0));
calendar.set(Calendar.SECOND, 0);
if(calendar.before(Calendar.getInstance()))
calendar.add(Calendar.DATE,1);
alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
AlarmManager.INTERVAL_DAY
, pendingIntent);
System.out.println("ALARM SET STATUS");
}
Alarm is first scheduling at the exact time perfectly but it does not gets repeated.
Actually I wanted to show notification daily at the specified time and I am passing a String with the intent. By default I had set to 12:00 PM but user can change its time. The first notification after setting time (or the first alarm) is working but its repetition is not working.
Please have a look, and if someone knows a better solution to show notification daily at the same specified time it would be appreciated if you tell me.
Thanks in advance

user setRepeating for Repeating Alarm
AlarmManager manager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
/* Repeating on every interval */
manager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pendingIntent);

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.

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);