I am developing an application that must hide title bar to increase screen spaces and for design issues. on non-physical buttons devices like nexus-4 and for Android > 3.0, I can't switch to use Action bar because the title bar is hidden, and in the same times these devices hasn't physical buttons to use standard menu.
My Question: How can I solve this problem
Thanks
How can I solve this problem
Modify your UI to either:
Add back the action bar, or
Add something else on your screen, such as a button, to display something else on the screen that will serve as your "menu". You can see this approach used by many games.