First I will just say this is only for my personal use and will be used only on my phone.
I saw allot of whatapp custom client (mods) on the internet for an example whatsapp plus.
I am developing on android for some time now but I wasn't enable to fiend the way they does it, the only way that I did manged to accomplish is editing the xml files of the original apk. But the adjustment that i am thinking about requires the code files that I can't get (ofcourse). I have tried to Decompile the gb whatsapp download apk but I get allot of SMALI files and to make use of them seems nearly impossible.
I wouldn't even bother but the amount of custom apks out there and not just for whatsapp is huge and making it looks relatively easy, Can someone explain how they all do that ?
Sorry if stack-overflow is not the right place to ask this question but my main topic is code devolving so I think it is related..