title: How to set ViewPager size
body: <p><img src="https://i.stack.imgur.com/GWbpV.png" alt="Layout"></p>
  
  <p>Could I set the viewpager's size?
  like the image1,
  I want to show 3-page in the same screen.</p>
  
  <p>If not, I can only use LinearLayout?</p>