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→Services & Broadcast receivers
We're only going to look at a small subset of this topic: Intent Services.
* We'll create an Intent Service as described [https://developer.android.com/training/run-background-service/create-service.html here]. The [http://developer.android.com/guide/components/services.html service overview] has a little too much information.
* Then our activity (which has to be in the same project as the service) will call one function of the service with a parameter or two.
* Once the service is done its work - it will send a response back via an Broadcast Intent
