How can i know if system bars are visible?

Question

I try to know on each devices (tablet and phone with or without physical button) if system bars are visible (status bar, navigation bar and system/combined bar).

How i can do that ???

François

edit: android:minSdkVersion=11 in my app

Answer 1

I need to know the height of my page in portrait mode in dp.

Then measure the height of the View that represents your "page".