title: How to implement trackbar like this image - Android?
body: <p>Please help me implement this view.
  Clicking circles brings up mouse over of actual value of min/max/target.
  Bar length don't according to any thing.
  But bar color's according to target circle. 
  Thanks a lot
  <img src="https://i.stack.imgur.com/5WSMd.png" alt="enter image description here"></p>