title: Broadcast Receiver when App is closed
body: <p>I don't know how to detect when a user plug his headset in the phone when the app is closed or killed. I can do this when the app is running but i want to be able to do this when its closed. I think I have to make a Broadcast Receiver into my service but I don't know how to do it...
  Thanks for help,
  A french developper who is trying to speak english</p>
  
  <p>EDIT: I am on Android Studio</p>