Where to keep Retrofit Adapter in Android App?

Question

I am not clear on where Refrofit adapter and API classes should be kept in Android? Should I use Application class or Singleton to keep the adapter? How about the API inte

Answer 1

Both of these should be treated as singletons and only created once.

The RestAdapter holds the common request executor, shared HTTP client configuration, remote service info, etc. These should be shared for every API interface.

The API interfaces should also be singletons. They are thread safe and require a bit of initial processing when created (minimal, but non-zero).