HttpUrl.Builder urlBuilder = HttpUrl.parse("xxx.xxxx.xx.x.xx.xxx.x").newBuilder();
    String url = urlBuilder.build().toString();
    RequestBody requestBody = new MultipartBody.Builder()
            .setType(MultipartBody.FORM)
            .addFormDataPart("ddi", String.valueOf(ddi.getText()))
            .addFormDataPart("numero", String.valueOf(numero.getText()))
            .build();

    Request request = new Request.Builder()
            .url(url)
            .post(requestBody)
            .build();

    client.newCall(request).enqueue(new Callback() {
        @Override
        public void onFailure(Call call, IOException e) {

        }

        @Override
        public void onResponse(Call call, Response response) throws IOException {
            Log.d("Response: ",response.body().string());

        }
    });
}