How to send POST request parameters to Retrofit2

Today I just started learning Retrofit2 and immediately ran into problems:

• Everywhere in the annotations @POST and @GET you need to register the parameters. But I have test.ru/mobile-api.php . And there are data entry forms. Empty POST is sent, error gives

• I need to manually pack a JSON answer.

• Until today, I used the DefaultHttpClient and sent it like this:

   List<NameValuePair> valuePairs = new ArrayList<>(); valuePairs.add(new BasicNameValuePair("login", Application.Login)); valuePairs.add(new BasicNameValuePair("limit", "20")); valuePairs.add(new BasicNameValuePair("f", "get_all_vacancies")); valuePairs.add(new BasicNameValuePair("page", String.valueOf(vacancyPage))); HttpResponse httpresponse = HttpUtils.getInstance().post(Application.VACANCY_API, valuePairs); final String response = HttpUtils.httpResponse2String(httpresponse); if (response != null) { } 

It worked and could check the response .

But now I am making a request using Retrofit2

In the interface

 @POST("/mobile-api.php") Call<List<Model>> getAllVacancies(@Query("login") String login, @Query("limit") String limit, @Query("f") String query_name, @Query("page") String page); 

In App Class

 retrofit = new Retrofit.Builder() .baseUrl("http://test.ru") .addConverterFactory(GsonConverterFactory.create()) .build(); 

In MainActivity

 App.getApi() .getAllVacancies(App.Login, App.Limit, "get_all_vacancies", "1") .enqueue(new Callback<List<Model>>() { @Override public void onResponse(Call<List<Model>> call, Response<List<Model>> response) { Toast.makeText(MainActivity.this, "Успех", Toast.LENGTH_SHORT).show(); modelList.addAll(response.body()); recyclerView.getAdapter().notifyDataSetChanged(); } @Override public void onFailure(Call<List<Model>> call, Throwable t) { Toast.makeText(MainActivity.this, "Произошла ошибка при соединении", Toast.LENGTH_SHORT).show(); } }); 

I can not do debugging, it immediately onFailure() to onFailure()

Question: What am I doing wrong?)