Develop Reference

Alarm Manager triggering only the last scheduled task in Android

I am using Alarm Manager to schedule different jobs to be executed at different hours of the day. When i am scheduling only one job it is working expectedly, but when i schedule multiple jobs, only the last scheduled gets executed. Below are my codes.
private void triggerAlarm(int hr, int min, String sid, String cid) {
Intent intentToFire = new Intent(getApplicationContext(), AlarmBroadcastReceiver.class);
intentToFire.putExtra("cid", cid);
intentToFire.putExtra("sid", sid);
intentToFire.setAction(ACTION_ALARM);
PendingIntent alarmIntent = PendingIntent.getBroadcast(getApplicationContext(),
0, intentToFire, 0);
AlarmManager alarmManager = (AlarmManager) getApplicationContext().
getSystemService(Context.ALARM_SERVICE);
Calendar c = Calendar.getInstance();
c.set(Calendar.HOUR_OF_DAY, hr);
c.set(Calendar.MINUTE, min);
c.set(Calendar.SECOND, 0);
long afterTwoMinutes = c.getTimeInMillis();
alarmManager.set(AlarmManager.RTC_WAKEUP, afterTwoMinutes, alarmIntent);
//sendBroadcast(intentToFire);
}

You can use id for your AlarmReceiver I Also Using this and hope it's also works for you
in targetCal Param just pass your calander obje where you selecting time for alarm
like this
private void setAlarm(Calendar targetCal) {
Intent intent = new Intent(getBaseContext(), AlarmReceiver.class);
final int _id = (int) System.currentTimeMillis();
PendingIntent appIntent = PendingIntent.getBroadcast(this, _id, intent,PendingIntent.FLAG_ONE_SHOT);
// PendingIntent pendingIntent = PendingIntent.getBroadcast(getBaseContext(), RQS_1, intent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, targetCal.getTimeInMillis(),
appIntent);
}
Hope it works for you.

Android set alarmManager to trigger daily

In my app, I need to start a service at 2:00pm daily. Right now I wrote the code to trigger the alarm once, this code is ran every time I open the app:
AlarmManager alarmMgr = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(this, DownloadReceiver.class);
PendingIntent pIntent = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
alarmMgr.cancel(pIntent);
Calendar cal= Calendar.getInstance();
cal.setTimeInMillis(System.currentTimeMillis());
cal.set(Calendar.HOUR_OF_DAY,refreshhour);
cal.set(Calendar.MINUTE,refreshmin);
cal.set(Calendar.SECOND, 0);
// if the scheduler date is passed, move scheduler time to tomorrow
if (System.currentTimeMillis() > cal.getTimeInMillis()) {
cal.add(Calendar.DAY_OF_YEAR, 1);
}
if(android.os.Build.VERSION.SDK_INT>=23) {
alarmMgr.setAndAllowWhileIdle(AlarmManager.RTC_WAKEUP,
cal.getTimeInMillis(), pIntent);
}
else{
alarmMgr.setInexactRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),
AlarmManager.INTERVAL_DAY, pIntent);
}
Q1. I used setAndAllowWhileIdle() for sdk above 23 in case the device is in Doze mode. I cannot find any option in this function that I can set the alarm to repeat every day.
Q2. I also have questions about setInexactRepeating() , normally it is set to repeat every day by setting the parameter INTERVAL_DAY , but in the docs, it says
As of API 19, all repeating alarms will be inexact and subject to
batching with other alarms regardless of their stated repeat interval.
Does this mean INTERVAL_DAY does not work anymore, so how can I set the alarm daily without rerunning this function and reset alarmManager?

Try below code will solve your problem-
AlarmManager alarmMgr = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
boolean flag = (PendingIntent.getBroadcast(this, 0,
new Intent("totime.action.string"),
PendingIntent.FLAG_NO_CREATE) != null);
if(!flag)
{
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, 14);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
Intent intent = new Intent("totime.action.string");
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager) Data_Graph.this.getSystemService(Context.ALARM_SERVICE);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),(24*60*60*1000), pendingIntent);
}

How to start AlarmService every day

I have an AlarmService that is initialized when the devicve boots, starts at 6 am, ends at 6 pm and repeats hourly.
How do I make sure that it starts again after I cancel it at 6 pm?
This is my BootReceiver:
if (intent.getAction().equals("android.intent.action.BOOT_COMPLETED")) {
// assign RefreshService class
Intent alarmIntent = new Intent(context, RefreshService.class);
PendingIntent alarmPendingIntent = PendingIntent.getBroadcast(context, alarmManagerRequestCode, alarmIntent, 0);
// set the alarm
// it starts at 6 am and repeats once an hour
// elapsed_realtime is used to save ressources
AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
alarmManager.setInexactRepeating(AlarmManager.ELAPSED_REALTIME, firstRefresh,
AlarmManager.INTERVAL_HOUR,
alarmPendingIntent);
}
So it is initialized when the device boots and starts at 6 am (firstRefresh) and repeats hourly.
To have it stop I would put the following into my RefreshService(lastRefresh is 6 pm in milliseconds):
if (System.currentTimeMillis() >= lastRefresh) {
Intent alarmIntent = new Intent(this, RefreshService.class);
PendingIntent alarmPendingIntent = PendingIntent.getBroadcast(this, BootReceiver.alarmManagerRequestCode, alarmIntent, 0);
AlarmManager alarmManager = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
alarmManager.cancel(alarmPendingIntent);
}
Appreciate y'alls help!

Thanks #Opiatefuchs for pointing that out:
The only thing you have to do is setting the alarm after cancelling it and setting the first time it's fired to needed time the next day.

Use calender, AlarmManager and pendingIntent for this-
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, 5); // For 5 AM or 6 AM
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
PendingIntent pi = PendingIntent.getService(context, 0,
new Intent(context, NewClass.class),PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
am.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
AlarmManager.INTERVAL_DAY, pi);

Use setRepeating:
here is the nice example:
https://stackoverflow.com/a/13879448/4617458

Repeating Alarmmanager to stop at quite/night hours

I have an alarmmanager set to fire every 3 hours a day and its working fine. Now my problem is i dont want alarmmanager to fire at night hours i.e from 9pm to 9am on next day.
My code:
Intent myIntent = new Intent(context, MyScheduledReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, myIntent, PendingIntent.FLAG_UPDATE_CURRENT);
//PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, myIntent, 0);
AlarmManager alarmManager = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
long interval = 3*60*60*1000;
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), interval, pendingIntent);
and to stop this alarmmanager repeating, i used this snippet to stop manually.
Intent myIntent = new Intent(context, MyScheduledReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, myIntent, 0);
AlarmManager alarmManager = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
alarmManager.cancel(pendingIntent);
Now how do i check if the time is in night hours or at day hours?

android how to set the phone alarm through code

I want to set the alram for phone through program coding. I have an button where by clicking DatePicker come & also time picker. I want what time i set here that time should be set in phones alaram. How can I do that . plz give me the answer . Thank you

Please try this....
Calendar cal = Calendar.getInstance();
cal.add(Calendar.DAY_OF_YEAR, 0);
cal.set(Calendar.HOUR_OF_DAY, 9);
cal.set(Calendar.MINUTE, 01);
cal.set(Calendar.SECOND, 0);
Intent intent = new Intent(Alarm.this, Alarm1.class);
PendingIntent sender = PendingIntent.getBroadcast(this, 1234567, intent, 0);
PendingIntent sende2 = PendingIntent.getBroadcast(this, 123123, intent, 0);
AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), sender);
am.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), sende2);
Intent intent1 = new Intent(Alarm.this, Alarm1.class);
PendingIntent sender1 = PendingIntent.getBroadcast(this, 1234567, intent1, 0);
AlarmManager am1 = (AlarmManager) getSystemService(ALARM_SERVICE);
am1.cancel(sender1);
b1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Alarm a = new Alarm ();
a.setAlarm();
b1.setText(prod);
}
});