How to hide Android buttons in order to run the program in fullscreen (see the screen below):

6902796

My records in sys.txt are these:

[device]
type="android"

[android]
lock_to_external_sd=1
fullscreen=1

[opengl]
is_full_screen_invalidate_only=1
fbograb=0

[rawdisplay]
screen_xy="auto"