title: Android best way to change dynamically part of layout in fragment
body: <p>I have a fragment with its layout (fragment_layout.xml). In this layout I want to change dinamically one of its part (empty layout) to insert others piece layouts (first, second and third layout) as described in the image. </p>
  
  <p><img src="https://i.stack.imgur.com/GVuka.png" alt="enter image description here"></p>
  
  <p>I don't want to change all layout of the fragment but only a part of it.</p>
  
  <p>What is the best way to do it?</p>