add features to my chat application

I have purchased a chat application on Codecanyon. [login to view URL] [login to view URL] 1. Add status features to online/offline chat application users 2. change feature: add friends from contacts to add friends from chat application users. [login to view URL] -Add universal group features. -in the picture above there are 2 buttons. the first button goes to the universal group and the second button goes to my special group or standard application group. -all registered chat application users can discuss in a universal group without having to make friends with other users or without conditions. -features in the universal group are the same as standard group features. I attach the following standard group features ([login to view URL]). This application is done using the Android Studio. I will give the src to add the features that I want.