Codez une application Android

what i want is to create a trade oriented social network, i already have the iconographie and the marketing now i want the app. i see the app like an almost perfect reprodution of whatsapp app But the main display is like a whatsapp group. in the first display peoples publish products whit or whitout pictures and a comment, if somebody is interested in one product he just taps on it and he can speek with the seller . everything a user does is recorded into his time line that only him can see . if you are interested into doing it i ll tell you further details Ps : Ans asap