title: SeekBar with thumb - obscured by view above
body: <p>I want to implement a layout with SeekBar (controller of audio playback) that is thin - meaning only the vertical progress line is visible and the thumb view should be above the top and bottom view. Unfortunately the part of the thumb gets obscured by the above view. 
  My view looks like below:</p>
  
  <p><a href="https://i.stack.imgur.com/wadqI.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/wadqI.png" alt="enter image description here"></a>
  Below is the layout schema of my Activity. </p>
  
  <p><a href="https://i.stack.imgur.com/ceNwZ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ceNwZ.png" alt="Activity schema"></a></p>