Android 4.0.3 Hide Notification Bar and Title Bar - android

I want to make my application go fullscreen in any android device. Hide the Title bar and also the notification bar. The application is supposed to run on a 10 inch tablet on Android 4.0.3.
I am using the following code but only the title bar disappears. I want to hide the notification bar also. Can anyone please tell me what I am doing wrong in my code ?
getWindow().requestFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);


try this
getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
Hope it helps.
Edit:
The SYSTEM_UI_FLAG_HIDE_NAVIGATION is a new flag that requests the
navigation bar hide completely. Be aware that this works only for the
navigation bar used by some handsets (it does not hide the system bar
on tablets). The navigation bar returns to view as soon as the system
receives user input. As such, this mode is useful primarily for video
playback or other cases in which the whole screen is needed but user
input is not required
.


The thing holding the navigation buttons back and home, time, network information etc is referred to as "navigation" bar.
You can not hide it within the given framework, but it is possible if rooting the device is an option for you:
Root device
Install and run Busybox
Install HideBar
In HideBar there is an option to run in 'Kiosk' mode, in which there is no way to re-display the navigation bar. Needless to say, you really need to be careful with this.
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