title: Change toolbar like gmail Android?
body: <p>Gmail shows us an feature that it changes the toolbar color and button , and also highlight the recycleView when we click on the circle. Is there anyway I can implement this feature? </p>
  
  <p>To make thing clear, I have added 2 images to show what I meant(notice on the 3rd row). </p>
  
  <p>Before : 
  <img src="https://i.stack.imgur.com/7zQFJ.png" alt="enter image description here"></p>
  
  <p>After : 
  <img src="https://i.stack.imgur.com/aG5WP.png" alt="enter image description here"></p>