title: Android: seekbar in button
body: <p>I have a Button in my android application, and I need to expand it on click and display a Seekbar inside it, like at the picture below. What is the best practice to do that?</p>
  
  <p><img src="https://i.stack.imgur.com/xFnfG.png" alt="enter image description here"><img src="https://i.stack.imgur.com/q7vXV.png" alt="enter image description here"></p>