title: Android apk size less than 20kb
body: <p>Need to build an android apk less than 20kb, and rest of the contents in the app should download dynamically, does anyone have idea about that.
  If i create a simple android app and build it without any source code, it results in 3 MB atleast. 
  So, so pls someone suggest me how can we create an apk in kb.</p>