Does anybody know what i mean?
In fullscreen mode of the new camera app on my galaxy nexus the control buttons are changing into 3 dots.
How can i activate t
You can use
getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE);
within your activity.
See View.SYSTEM_UI_FLAG_LOW_PROFILE
It's a standard Options Menu. On 3.0+ it creates those dots, in 2.3.3- you access it with the menu key.
http://developer.android.com/guide/topics/ui/menus.html