Simple Android Counter app
The creation of this app is described in the following blog posts:
http://www.jimbobbennett.io/building-an-android-app-part-1/
http://www.jimbobbennett.io/building-an-android-app-part-2/
http://www.jimbobbennett.io/building-a-xamarin-android-app-part-3/
http://www.jimbobbennett.io/building-a-xamarin-android-app-part-4/
http://www.jimbobbennett.io/building-a-xamarin-android-app-part-5/