Question

I’m struggling to decide which class to use, Activity or Service.
My application is complicated so I will use another example. A timer.

I would like to create an application that start to count the seconds when I open the application and keep counting even when I click the back button.
When I back to the application it will have a gui that show me the time.

So the gui I guess would be the activity and the counting method would be on the service.. but how do I manage that system?how they will be communicating? how can I do that?

Answer 1

You can use BroadcastReceivers and send broadcasts that your activity will be listening to, or you can use Messenger to send messages from the service to the activity