Default help, need at transparent status bar

Hi ! i'm new in the forum & i dont know how i can compile systemUI.apk
can any one do it for me ! please
i'm using a JB-XXMG2
SORRY FOR MY BAD ENGLISH
Device :
SAMSUNG GALAXY ACE II

ROM : Stock 2.3.6 JPLD6
KERNEL : Ex Kernel 1.2
RECOVERY : TWRP