how to Access to the Response body in the retrofit?

Question

I changed the Volley library to Retrofit. Now I want to access the response body like the Volley library. I searched the internet and came up with this solution, but when I run the program, the program closes and shows a low error. Thank you in advance for your help.

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apiService Class

   public void getVerifyCode(String mobile, RequestStatus requestStatus) {
    Log.i(TAG, "getVerifyCode: Called");

    JsonObject jsonObject = new JsonObject();
    jsonObject.addProperty("command", "register_user");
    jsonObject.addProperty("mobile", mobile);

    Log.i(TAG, "getVerifyCode: requestCode: " + jsonObject.toString());
    retrofitApi.getVerifyCode(jsonObject).enqueue(new Callback<ResponseBody>() {
        @Override
        public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
            Log.i(TAG, "getVerifyCode:onResponse: " + response.toString());
            requestStatus.onSuccess(response.toString());
        }

        @Override
        public void onFailure(Call<ResponseBody> call, Throwable t) {
            Log.e(TAG, "getVerifyCode:onFailure= " + t.getMessage());
            requestStatus.onError(new Exception(t));
        }
    });
}

---

Retrofit Callback

@POST(".")
Call<ResponseBody> getVerifyCode(@Body JsonObject body);

---

Logcat

I/ApiService: getVerifyCode: Called
I/ApiService: getVerifyCode: requestCode: {"command":"register_user","mobile":"0915*******7"}
I/ApiService: getVerifyCode:onResponse: Response{protocol=http/1.1, code=200, message=OK, url=http://**********ion.freehost.io/}
W/System.err: at ir.*****pp.*****k.ApiService$2.onResponse(ApiService.java:75)

Answer 1

Finally, with these changes, I was able to reach a conclusion.

ApiSeviceClass

  public void getVerifyCode(String mobile, RequestStatus requestStatus) {
        Log.i(TAG, "getVerifyCode: Called");

        HashMap<String, String> map = new HashMap<>();
        map.put("command", "register_user");
        map.put("mobile", mobile);

        Log.i(TAG, "getVerifyCode: requestCode: " + map.toString());

        retrofitApi.callBack(map).enqueue(new Callback<ResponseBody>() {
            @Override
            public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
                try {
                    if (response.isSuccessful()) {
                        String strResponseBody = response.body().string();
                        Log.i(TAG, "getVerifyCode:onResponse: " + strResponseBody);
                        requestStatus.onSuccess(strResponseBody);
                    }
                } catch (IOException e) {
                    Log.e(TAG, "onResponse: " + e.getMessage());
                }
            }

            @Override
            public void onFailure(Call<ResponseBody> call, Throwable t) {
                Log.e(TAG, "getVerifyCode:onFailure= " + t.getMessage());
                requestStatus.onError(new Exception(t));
            }
        });
    }

---

Retrofit Callback

 @POST(".")
    Call<ResponseBody> callBack(@QueryMap Map<String, String> map);