Retrofit: How to send a POST request with constant fields?
I want to sent a simple POST request with one actual parameter: @POST("/token") @FormUrlEncoded void extendSession(@Field("refresh_token")final String refreshToken); But this request should also send some constant values requested by the server such as client_id , client_secret and grant_type which are constant and should not be part of the application API. What is the best way to do this? It is matter of your approach. If you have the constants you can build a default Map of values required for your call. @FieldMap will be suitable for building a Map with all your required fields private void