Xamarin Android | 用户界面在设备中显示为空白

Question

I'm developing android app for learning purpose. I've installed Xamarin 4.2.1.60 on my laptop. I created a simple Layout and tried to run it on my One Plus 3 (Android M 6.0.1) and Moto G (Android L 5.1) 1st Gen but the layout shows up empty in both of them. It also gives me a below Exception on running:

Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object.

On pressing break, a window open in Visual Studio with Header saying Source Not Available (Please see attached screenshots)

Please suggest how can I resolve this.

Designer Screen:

Device Screen:

Exception Window:

Answer 1

确保在MainActivity.OnCreate()使用有效的Android布局设置默认的SetContentView() 。