title: Using backdrop on Android
body: <p><a href="https://material.io/design/components/backdrop.html" rel="noreferrer">https://material.io/design/components/backdrop.html</a></p>
  
  <p>I found this on Material Design, but couldn't find any resources.
  Thinking about its layout, I think it's made up of any layout with material card view, and I am trying to make my activity file using layout + material card view. Is this method correct to make backdrop layout?</p>
  
  <p>Also, I want to know about which layout I should use. Is RelativeLayout can be the way? I don't get it actually.</p>