select theme for android phone programatically

Hi I want to create an android application which displays list of themes(Not the default themes shown in personalize menu in the phone) and user must select the theme which in turn changes the theme of the android phone.

Is this possible? If yes kindly tell how and g开发者_如何转开发ive me links for the code samples for doing this.

---

This is not possible to do in a third party application.