title: After decompile apk why class names and object are letter
body: <p>I'm trying to learn new android methods.Before I develop new android application, I'm searching published applications.</p>
  
  <p>If I decompile my application's apk, class names and objects names remains same</p>
  
  <p>But If I decompile application that is in market, class and object names contains letter. That is why I don't understand what programmer did in code.
  Do they encrypt the code?
  any way to decrypt it?</p>