title: How to customize PagerTitleStrip android
body: <p>I must customize a PagerTitleStrip in ViewPager in this way:
  <img src="https://i.stack.imgur.com/Vqfwr.png" alt="enter image description here"></p>
  
  <p>I have to create circles with numbers corresponding to the inside pages, the circle in the middle has to be bigger. Anyone have any suggestions?</p>