Retrofit 2: @Query "encoded=false" doesn't work

0. I am using Retrofit 2 for work with Bank API.

1. I have some interface:

public interface ApiService {
    @GET("statdirectory/exchange")
    Call<List<MyModel>>  getСurrency(@Query("date") String inputDate);
}

2. When I call method getСurrency(someParametr), where someParametr is string, consist with "date&json" (for example, "20170917&json"):

ApiService apiService = RetrofitController.getApi();
apiService.getCurrency("20170917&json").enqueue(new Callback<List<MyModel>>() {   
      @Override
      public void onResponse(Call<List<MyModel>> call, Response<List<MyModel>> response) {
          call.request().url();
          Log.e("URL",  call.request().url()+"");
          response.code();
          Log.e("CODE", response.code()+"");      
}
//.....

3. I see that:

URL: *"https://bank.gov.ua/NBUStatService/v1/statdirectory/exchange?
date=20170917**%26**json"* (**&** is replaced by **%26**)
CODE: *"404"*

4. In my interface I add encoded:

getСurrency(@Query(value="date", encoded=false) String inputDate);

But my result is the same as in step 3!

5. How to check this problem? How to get URL without %26 on my string? I read other questions with similar problems, but it didn't solve my problem. Thanks!

As noted here https://github.com/square/okhttp/issues/2623 by swankjesse

Use HttpUrl to build the url

HttpUrl url = HttpUrl.parse("https://bank.gov.ua/NBUStatService/v1/statdirectory/exchange?date=20170916&json");

Then change your method call to

@GET
Call<List<MyModel>>  getСurrency(@Url String ur);

Then

 apiService.getCurrency(url.toString())
       .enqueue(new Callback<List<MyModel>>() {

        @Override
        public void onResponse(Call<List<MyModel>> call, retrofit2.Response<List<MyModel>> response) {
            // your response
        }

        @Override
        public void onFailure(Call<List<MyModel>> call, Throwable t) {

        }

    });

Other way is to use Okhttp's Interceptor and replace %26 by &

class MyInterceptor implements Interceptor {
   @Override
   Response intercept(Interceptor.Chain chain) throws IOException {
    Request request = chain.request()
    String stringurl = request.url().toString()
    stringurl = stringurl.replace("%26", "&")

    Request newRequest = new Request.Builder()
        .url(stringurl)
        .build()

    return chain.proceed(newRequest)
 }
}

Then

 OkHttpClient client = new OkHttpClient.Builder();
 client.addInterceptor(new MyInterceptor());