title: launcher animation when phone is unlocked
body: <p>I'm new to Android and I'm trying to make a launcher as my first Android project. I've done the basic work of displaying installed apps. Now I want to add animations to improve user experience. But I'm not able to figure out the following two things :</p>
  
  <ol>
  <li><p>How to add animation when the phone is just unlocked and apps are displayed on the homescreen like in iPhone or MIUI stock launcher?</p></li>
  <li><p>How to know the app that is minimized or closed on pressing the home button so that I can show an animation like the app is minimized to it's icon on homescreen just like in MIUI?</p></li>
  </ol>