title: How to create and manage custom themes for whole Android system?
body: <p>I know how to create and apply styles and themes thanks to <a href="http://developer.android.com/guide/topics/ui/themes.html" rel="nofollow noreferrer">http://developer.android.com/guide/topics/ui/themes.html</a>. However, this method only works for our own activity or application.</p>
  
  <p>I'd like to create themes that could dress the whole system (i.e. all activities). Of course, I'd like to select one of these theme by programing. If I could customize the status bar as well, it would be perfect.</p>
  
  <p>I didn't find out documentation about that. Can you help me?</p>
  
  <p>Thanks!</p>