Is there a way to hide the system/navigation bar in Android ICS

Question

I'd like to extend the discussion regarding hiding of the system/navigation bar at the bottom of the screen on Android Ice Cream Sandwich (4.0 and up) tablet devices.

There's already a thread ( Is there a way to hide the system bar in Android 3.0? It's an internal device and I'm managing navigation ) about hiding the bar on Honeycomb devices. My clients, however, will be using the newest Ice Cream Sandwich devices and are very keen on hiding the bar at the bottom the screen. Their application is not for regular consumer use and it's very important for them to take over the whole screen to provide their experience. How possible is it to hide this bar -- or at least, override the behaviour of all the buttons -- without rooting the devices or rewriting its firmware?

Answer 1

Check out SYSTEM_UI_FLAG_HIDE_NAVIGATION, this flag hides the navigation bar until the user interacts with the device. It was introduced in Android 4.0. You can enable this flag for example like this:

getWindow().getDecorView()
           .setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);

Note that the navigation won't disappear again automatically, you have to set it every time after the user interacted with the device.

Alternatively you can make the navigation less obtrusive by using SYSTEM_UI_FLAG_LOW_PROFILE, this changes the buttons into small dots (e.g. like the camera app).