Retrofit 2 - Response body null when response status is 422 (unprocessable entity)

Question

I\'m using Retrofit to make a POST Request in my web server.

However, I can\'t seem to get the response body when the response status is 422 (unprocessable entit

Answer 1

I got the same error. My API was working using POSTMAN request but not working from Android retrofit call.

At first I was trying using @Field but it was getting error but later I've tried with @Body and it worked.

Sample Retrofit interface call

@POST("api/v1/app/instance")
Call updateTokenValue(
        @HeaderMap Map headers,
        @Body String body); 

and API calling code is:

 Map headerMap=new HashMap<>();
        headerMap.put("Accept", "application/json");
        headerMap.put("Content-Type", "application/json");
        headerMap.put("X-Authorization","access_token");

        Map fields = new HashMap<>();
        fields.put("app_name", "video");
        fields.put("app_version", "2.0.0");
        fields.put("firebase_token", "token");
        fields.put("primary", "1");

        ApiInterface apiInterface = ApiClient.getApiClient().create(ApiInterface.class);
        Call call = apiInterface.updateTokenValue(
                headerMap,new Gson().toJson(fields));