How to change size of title's text on Action Bar?

Question

There is an ActionBar on each Android 4.0 application, and it got a title. I need to make this size less. But I don\'t understand how I can do it, because

Answer 1

The text's size in Android ActionBar is standard.

Since ICS, Android now develops a standard so that applications will (hopefully) follow the same UI guidelines and design principles.

http://developer.android.com/guide/practices/ui_guidelines/index.html

This is why you can't change it.

However, if you still want to do so, you could use a custom Theme or maybe implement ActionBar (a fork) and modify its sources: https://github.com/johannilsson/android-actionbar to get maximum control.