Access Native Camera from Shared Code in Xamarin.forms

Question

Hi all,

 

I wants to develop a Xamarin.Forms mobile app to capture image using native camera with Overlay. I am new in xamarin.forms. i have found below link-

 

https://docs.microsoft.com/en-us/xamarin/xamarin-forms/app-fundamentals/custom-renderer/view

 

but there is no capture button to take image. i want to add capture button in Content Page (Xaml page/Shared code) not in xml page.

 

Please help..

thanks in advance