title: When and why should I use fragments in Android applications?
body: <p>I often need the different parts of my applications to have their own special behavior and UI, and I don't know how fragments can help. In most cases, I think it is quicker to create 2 different activities (e.g., 1 for tablets and 1 for handsets), and to share the common behaviors and events in a third class.</p>
  
  <p>So, keeping this in mind, why should I use fragments ?</p>