This is an implementation of Retrofit2 with Model View Presenter architecture.
In this project 'https://jsonplaceholder.typicode.com' API is used to test GET request.
To use it in your api change RetrofitApiService according to your api calls and implement RestClient and RestService interface.
Please see RetrofitManager class to see where actual retrofit Call is made.
Also, add callback class and pass reference of RequestListener interface.
Please see RequestCallback class for reference.
As you see,this implementation is only for async call.
TO DO: Add support for sync call