[My Android Advanced Tour] Implement the indicator that follows the ViewPager to slide and slide, and slide to the last page and continue to slide to jump to other pages

1. Requirements description

I recently made a requirement, which has a small requirement described as follows:

Make a page that can slide left and right, and then there is an indicator that slides along with the page at the top of the page. And if you continue to slide when you slide to the last page, you will jump to another page.

The effect is as follows:

• The first page
  

• Page 6
  

• the last page