title: How can I add item number on the cart icon at at appBar icon in flutter? And how can I make it animate adding new item?
body: <p>I want to add item numbers on the cart icon in flutter like this in picture, and want to animate while adding new item to cart. My cart icon is in appBar. </p>
  
  <p><a href="https://i.stack.imgur.com/0zbec.png" rel="noreferrer"><img src="https://i.stack.imgur.com/0zbec.png" alt="enter image description here"></a></p>