CODEWITHSUNDEEP
androidandroid-serviceandroid-alarms
Amanni
Amanni

Reputation: 1934

Create repeated service with alarm

Im try to create a service in my app to update data everyday at 2pm. I want to set a repeating alarm which triggers a service to fetch the data for me. This has nothing to do with UI thread and should work even when the app is closed.

I can't seem to get my service to start.

Here is my code in my activity where I create the alarm

    Calendar cal = Calendar.getInstance();
    cal.set(Calendar.HOUR_OF_DAY, 20); // HOUR
    cal.set(Calendar.MINUTE, 0); // MIN
    cal.set(Calendar.SECOND, 0); // SEC
    Intent intent = new Intent(Main.this, VenueUpdater.class);
    PendingIntent pintent = PendingIntent.getService(Main.this, 0, intent, 0);
    AlarmManager alarm = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
    alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 30*1000, pintent);

Then my service class

public class VenueUpdater extends Service{

@Override
public IBinder onBind(Intent arg0) {
    return null;
}

@Override
public void onCreate() {
    Toast.makeText(this, "Create", Toast.LENGTH_SHORT).show();
    Log.i("SERVICE", "onCreate");
}

@Override
public void onDestroy() {
    Toast.makeText(this, "Destroy", Toast.LENGTH_SHORT).show();
    Log.i("SERVICE", "onDestroy");
}

@SuppressWarnings("deprecation")
@Override
public void onStart(Intent intent, int startid) {
    super.onStart(intent, startid);
    Toast.makeText(this, "Start", Toast.LENGTH_SHORT).show();
    Log.i("SERVICE", "onStart");
}

}

and in my Manifest just before I close my application tag

 <service android:enabled="true" android:name="services.VenueUpdater" />

</application>

I've checked some other examples and code where I've used services and the code seems to be fine but still doesn't work. Also I'm wondering if there is a better way to achieve this as the same alarm may end up being created multiple times but there may be a Pending intent Flag I can use to check that it doesn't.

Upvotes: 1

Views: 975

Answers (2)

David Wasser
David Wasser

Reputation: 95626

You've set your alarm to go off at 8PM, not 2PM with this:

cal.set(Calendar.HOUR_OF_DAY, 20); // HOUR

If you want to make sure that your alarm isn't scheduled multiple times, you can cancel any previously scheduled alarms before setting the alarm, like this:

alarm.cancel(pintent);

Also, this call to the AlarmManager:

alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 30*1000, pintent);

Will set your alarm to go off at 8PM and then every 30 seconds after that. Is that what you want?

EDIT Show how to set the alarm to repeat once per day at 2PM

To schedule the alarm to repeat once per day at 2PM, use this:

alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pintent);

Upvotes: 4

Lingviston
Lingviston

Reputation: 5671

1) In Service subclass use onStartCommad method to start all service routine. Not onStart/onCreate. 2) Here is example of my AndroidManife:

<service android:name=".service.AlertService" />

3) PendingIntent will everlap previous one (i.e. overlap alam) if it uses the same requestCode (the second param of getService method) and flag PendingIntent.FLAG_UPDATE_CURRENT is used as last param.

Try it.

Upvotes: 0

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