Write an Android application Chatting and Social Media Base location (google maps API)

i need Android Apps for Social Media ( Chatting) have a base location , can display the location of a room based on google maps, for example, building A, building B, C building so every building, office, mall, housing all will be divided into a chat room. so every room is divided based on the data of the building on google maps, so that each user who lit location maps will automatically be incorporated in the chat room in the location area where he was standing. also available for sellers who want to advertise in the room that location.   so that there is a user interface, seller interfaces, admin interface, and interfaces owner Admin interface there is also have a menu to change the image, banner, writing all the details look outside. all should be made as easy as possible be operated by ordinary people. all can be changed solely by admin to it as much [login to view URL] the others will be discussed after I determine the choice, make an offer to me. Sales to me not in encryption and is my right to distributed !