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for example i want to have an alarm that will fire every sunday at noon.... how would i do this?

BenMorel
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waa1990
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  • I was wondering something very similar. Would there be a way to fire an event every 30 minutes to an hour? Maybe some cron job? Just wondering what Android had to offer for this problem. Thanks – prolink007 Apr 08 '11 at 23:16

2 Answers2

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Use the AlarmManager class:

http://developer.android.com/reference/android/app/AlarmManager.html

Class Overview

This class provides access to the system alarm services. These allow you to schedule your application to be run at some point in the future. When an alarm goes off, the Intent that had been registered for it is broadcast by the system, automatically starting the target application if it is not already running. Registered alarms are retained while the device is asleep (and can optionally wake the device up if they go off during that time), but will be cleared if it is turned off and rebooted.

Use public void set (int type, long triggerAtTime, PendingIntent operation) to set the time to fire it.

Use void setRepeating(int type, long triggerAtTime, long interval, PendingIntent operation) to schedule a repeating alarm.

Here's a full example. I don't really remember all the Calendar methods, so I'm sure that part can be streamlined, but this is a start and you can optimize it later:

AlarmManager alarm = (AlarmMAnager) Context.getSystemService(Context.ALARM_SERVICE);
Calendar timeOff = Calendar.getInstance();
int days = Calendar.SUNDAY + (7 - timeOff.get(Calendar.DAY_OF_WEEK)); // how many days until Sunday
timeOff.add(Calendar.DATE, days);
timeOff.set(Calendar.HOUR, 12);
timeOff.set(Calendar.MINUTE, 0);
timeOff.set(Calendar.SECOND, 0);

alarm.set(AlarmManager.RTC_WAKEUP, timeOff.getTimeInMillis(), yourOperation);
gsgx
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Aleadam
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  • ya i know i need to use taht class just dont know how to get it to repeat every sunday at specified time – waa1990 Apr 08 '11 at 23:29
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    @will I updated the answer. It's part of the same AlarmManager api. Basically, you use an interval of a week 604,800,000 millis) – Aleadam Apr 08 '11 at 23:33
  • ok so how would i get sunday though just a little confused about this – waa1990 Apr 09 '11 at 00:01
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finally this right solution if set as (sun,tus ,fri) you must create three alarm for these three day the following code set alarm every sunday and send dayOfWeek=1;

 public void setAlarm_sun(int dayOfWeek) {
     cal1.set(Calendar.DAY_OF_WEEK, dayOfWeek);
     Toast.makeText(getApplicationContext(), "sun "+cal1.get(Calendar.DAY_OF_WEEK), 222).show();

     Toast.makeText(getApplicationContext(), "Finsh", 222).show();

        Intent intent = new Intent(this, SecActivity.class);
        PendingIntent pendingIntent0 = PendingIntent.getBroadcast(this, 0,
                intent, 0);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 12345,
                intent, PendingIntent.FLAG_UPDATE_CURRENT);

         Long alarmTime = cal1.getTimeInMillis();
         AlarmManager am = (AlarmManager) getSystemService(Activity.ALARM_SERVICE);

       // am.setRepeating(AlarmManager.RTC_WAKEUP, alarmTime,7* 24 * 60 * 60 * 1000 , pendingIntent);
        am.setRepeating(AlarmManager.RTC_WAKEUP, alarmTime,7* 24 * 60 * 60 * 1000 , pendingIntent);

}
Mo'nes Qasaimeh
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