title: How to create a tint filter on my app?
body: <p>I have been looking everywhere and I cant find an answer. </p>
  
  <p>I want to know how to make a tint over the screen of my andriod app, so when I swipe up it goes like you are swiping a layer up. </p>
  
  <p>So for example I open the app up and there is a transparent gray screen over the home screen of the app and I can swipe it up.  </p>
  
  <p>I know this is horribly explained so ask and i will try to be more descriptive. I am using visual studio and xamarin and c# for the andriod app. Many Thanks :). Any advice helps</p>