This is a simple example how to add Maps API to your Xamarin.Forms project for Android & iOS. To make it work on your Android device, enter your Google API key into AndroidManifest.xml file in .Droid project. If you don't know where to get this API key, or you want to know how to create similar app, visit my documentation example on stackoverflow: http://stackoverflow.com/documentation/xamarin.forms/drafts/32395