This is a small tutorial showing about porting UI Apps (Theming)
-A little respect :P
Its very easy no need of development skills...
So lets start
Of a rom to another..
At first decompile ur Stock Systemui.apk and custom Systemui.apk which u wanna port.
Now find the folder in custom SystemUI.apk name "res" then open it and search for "drawable-hdpi" open it and you will see a lot of png image replace all them to your stock systemui.apk! If you find any xml file then don't copy them. Then recompile the modded stock SystemUI.apk and replace with original one by root explorer..
Your device must be of the same resolution with the custom framework-res device (ex: qhd>qhd) .... If not then u may face dpi bugs.
decompile both stock and custom framework-res.apk.. Same as before find "res" open and find "drawable-hdpi" copy all the png to ur stock framework.. don't copy any xmls.. and recompile the modded stock framework-res.apk and replace with ur original by root explorer..
Written By - Snigdho Hasan
Don't forget to-
HIT A THANKS IF I HAVE HELPED YOU!