How to POST raw whole JSON in the body of a Retrofit request?

Question

This question may have been asked before but no it was not definitively answered. How exactly does one post raw whole JSON inside the body of a Retrofit request?

See

Answer 1

Solved my problem based on TommySM answer (see previous). But I didn't need to make login, I used Retrofit2 for testing https GraphQL API like this:

1. Defined my BaseResponse class with the help of json annotations (import jackson.annotation.JsonProperty).

   public class MyRequest {
       @JsonProperty("query")
       private String query;
   
       @JsonProperty("operationName")
       private String operationName;
   
       @JsonProperty("variables")
       private String variables;
   
       public void setQuery(String query) {
           this.query = query;
       }
   
       public void setOperationName(String operationName) {
           this.operationName = operationName;
       }
   
       public void setVariables(String variables) {
           this.variables = variables;
       }
   }
   

2. Defined the call procedure in the interface:

   @POST("/api/apiname")
   Call apicall(@Body RequestBody params);
   

3. Called apicall in the body of test: Create a variable of MyRequest type (for example "myLittleRequest").

   Map jsonParams = convertObjectToMap(myLittleRequest);
   RequestBody body = 
        RequestBody.create(okhttp3.MediaType.parse("application/json; charset=utf-8"),
                       (new JSONObject(jsonParams)).toString());
   response = hereIsYourInterfaceName().apicall(body).execute();