title: How to keep a CountDownTimer running even if the app is closed?
body: <p>I spent my summer learning how to code and building my first app (in android studio). Therefore I am not an expert coder. This week I encountered a problem. Basically, I am developing a quiz app and when the user gets the answer wrong he have to wait 5 min. The thing is  that when the countdowntimer starts and the user closes the app (by closing the app I mean destroy it and not just push the home button) the countdowntimer stops. I am wondering how I can manage to  keep the timer running even if the app is closed. Your help will be greatly appreciated and it would be fantastic if you guys give me a sample code.
  Thanks in advance!</p>