Only Second Alarm is executing why?

Question

I have two AlarmManager in my activity as follows,

public class MainActivity extends Activity 
{
    private AlarmManager alarm1,alarm2;  
    private Intent intent1,intent2; 
    private PendingIntent pi1,pi2;

    private int HOUR=15,MINUTE=46,SECOND=10;

    @Override
    protected void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Calendar calendar = new GregorianCalendar();
        calendar.setTimeZone(TimeZone.getDefault());
        calendar.setTimeInMillis(System.currentTimeMillis());
        calendar.set(Calendar.HOUR_OF_DAY, HOUR );
        calendar.set(Calendar.MINUTE, MINUTE );
        calendar.set(Calendar.SECOND, SECOND );

        intent1 = new Intent ( MainActivity.this, BroadCastAlarm.class );
        pi1 = PendingIntent.getService( MainActivity.this, 0, intent1, PendingIntent.FLAG_CANCEL_CURRENT );
        alarm1 = (AlarmManager) getSystemService( ALARM_SERVICE );
        alarm1.set( AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pi1 );

        Calendar calendar1 = new GregorianCalendar();
        calendar1.setTimeZone(TimeZone.getDefault());
        calendar1.setTimeInMillis(System.currentTimeMillis());
        calendar1.set(Calendar.HOUR_OF_DAY, HOUR );
        calendar1.set(Calendar.MINUTE, MINUTE );
        calendar1.set(Calendar.SECOND, SECOND+30 );

        intent2 = new Intent ( MainActivity.this, BroadCastAlarm.class );
        pi2 = PendingIntent.getService( MainActivity.this, 1, intent2, PendingIntent.FLAG_CANCEL_CURRENT );
        alarm2 = (AlarmManager) getSystemService( ALARM_SERVICE );
        alarm2.set( AlarmManager.RTC_WAKEUP, calendar1.getTimeInMillis(), pi2 );
    }
}

BroadCastAlarm.java is only a service that display Toast message. Here whenever I am executing above code only second Alarm is getting execute. How come first Alarm is not getting executed ?

@KarthickM Yes, The problem is solved and my application is working excellent since last 50 days — Vigbyor, Dec 09 '13 at 06:01
i am also working with that one;i am using multiple alaram with lots of variation,But while selecting the second alaram the first alaram is overriding with the new one. — Karthick M, Dec 09 '13 at 06:12
,ok i will try your code now,i have one doubt in that one,what is the alarmreceiver class,why you are using that one,or this one we need to add in service class or Mainactivity in the manifest file? — Karthick M, Dec 09 '13 at 06:30
Instead of service, I am using BroadcastReceiver for Alarm. That's it — Vigbyor, Dec 09 '13 at 07:02
i tried your way,but not worked,can you look my code http://pastie.org/8539144 — Karthick M, Dec 09 '13 at 09:28

njzk2 · Answer 1 · 2013-10-09T10:18:59.180

1

The PendingIntents represent the same Intent, hence your alarms are identical, hence your second alarm replaces the first one.

From the documentation,

If you use two Intent objects that are equivalent as per Intent.filterEquals, then you will get the same PendingIntent for both of them.

Also,

requestCode Private request code for the sender (currently not used).

(that the value you changed from 0 to 1)

edited Oct 09 '13 at 10:18

answered Oct 09 '13 at 10:12

njzk2

38,969
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I read [this](http://stackoverflow.com/a/12791212/2567598) answer already, I tried changing PendingIntent's value as 0 & 1 but still only one alarm is getting executed. – Vigbyor Oct 09 '13 at 10:14
Please refer my question once again. – Vigbyor Oct 09 '13 at 10:18
Please refer to the documentation once (again). – njzk2 Oct 09 '13 at 10:20
can you give me the doc link please ? – Vigbyor Oct 09 '13 at 10:21

Alex Cabrera · Accepted Answer · 2013-10-09T10:39:18.447

1

As other answers suggest, the second alarm is overriding the first one as they share the same action. If you want to diferentiate alarms, and not just overriding your previous ones you must set an action.

first of all, you need to add this in your application's manifest tag:

<receiver android:name="com.yourcompany.yourpackage.AlarmReceiver" android:process=":remote" >
    <intent-filter>
        <data android:scheme="timer:" />
    </intent-filter>
</receiver>

When defining your intents, just add something like:

intent1.setData(Uri.parse("timer:intent1"));
...
intent2.setData(Uri.parse("timer:intent2"));

Then you just need to define a BroadcastReceiver class to do stuff. If you want a toast:

public class AlarmReceiver extends BroadcastReceiver {

   @Override
   public void onReceive(Context context, Intent intent) {
      Toast.makeText(context, "I'm an alarm toast!!", Toast.LENGTH_LONG).show();
   }
}

I also suggest you to change your pending intent flags to: PendingIntent.FLAG_UPDATE_CURRENT.

edited Oct 09 '13 at 10:39

answered Oct 09 '13 at 10:29

Alex Cabrera

373
1
9

BroadCastAlarm.java is only a service that display Toast message , I tried PendingIntent.FLAG_UPDATE_CURRENT but result is same. – Vigbyor Oct 09 '13 at 10:34
change the service to a BroadcastReceiver if you can. as simple as the code provided – Alex Cabrera Oct 09 '13 at 10:42
Ok, I will try it and let you know. – Vigbyor Oct 09 '13 at 11:42
In case of Cancel an Alarm, do i need to cancel two times or just once is enough ? – Vigbyor Oct 09 '13 at 12:31
You need to cancel each identificator. – Alex Cabrera Oct 09 '13 at 15:07
@AlexCabrera for me the same problem is there,i am using multiple alaram with lots of variation,But while selecting the second alaram the first alaram is overriding with the new one. – Karthick M Dec 09 '13 at 05:59

score 0 · Answer 3 · answered Oct 09 '13 at 10:12

0

intent of alarm1 is replaced by the intent of alarm2. This is basic reason why only second alarm is working.

answered Oct 09 '13 at 10:12

Pradip

3,189
3
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Please refer my question once again. – Vigbyor Oct 09 '13 at 10:19

Only Second Alarm is executing why?

3 Answers3