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

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

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

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

* There is a limitation: because navigation controls are so important, the least user 
* interaction will cause them to reappear immediately. 

$ adb remount 
$ adb shell mv /system/app/SystemUI.odex /system/app/SystemUI.odexold 
$ adb shell mv /system/app/SystemUI.apk /system/app/SystemUI.apkold 
$ adb reboot