Best way to send an email each couple of minutes in android using a BroadcastReceiver, a TimerTask and a AsyncTask

Question

I have a broadcastReceiver that detects when Sim card is changed. I want to send an email each 5 or so minutes with the location of the phone. I have 3 choices in mind :

1. When Sim is changed : start a Service from broadcastReceiver, which starts a TimerTask. Then the TimerTask starts an AsyncTask which sends the email.

2. When Sim is changed : same as point 1, but i start an IntentService instead of a Service.

3. When Sim is changed : start a Service from BroadcastReceiver, which starts an AlarmManager,and then the AsyncTask.

Can you please tell me which one is better and safer? Thank you!

Answer 1

You can combine IntentService with AlarmManager. When sim card changed, your broadcastReceiver should start your intent service, then service send an email and schedule the next time to send. Take a look at this answer and make sure you know when to stop sending email to avoid drain battery.

Your service should look like:

 @Override
 protected void onHandleIntent(Intent intent)
 {
     // send email.

    // check whether or not sending next time
    if(canSendNextTime()){
        scheduleNextUpdate();
    }
}