How send key value in addMultipartParts Ion Koush library?

I'm using the Ion Koush Library in my android project, it is working fine but i don't know how to specify the key request when i use addMultipartParts function.

  Ion.with(this)
                            .load("POST",UPLOADIMAGESTG_URL)
                            .setTimeout(5000)
                            .setMultipartParameter("omni_id", String.valueOf(omniTesteGrade.getOmniProduct().get_id()))
                            .addMultipartParts(files)
                            .asJsonObject()
                            .setCallback(new FutureCallback < JsonObject > () {
                                @Override
                                public void onCompleted(Exception e, JsonObject result) {

                                    if (e != null) {

                                        pDialog.setTitleText("Não foi possível enviar imagens, enviando dados do produto");
                                        sendTgToServer(json);

                                    }else {

                                        pDialog.setTitleText("Enviando dados do produto");
                                        sendTgToServer(json);

                                    }

                                }
                            });

                }else {

                    sendTgToServer(json);

                }

Here is my code in Android, it is working fine in server side because i pick all the inputs with a laravel function Input::All() but when i want to pick specific request i use this code

foreach($fileObjects as $fileObject){

  if(is_file($fileObject)){        

       $imageList[] = $fileObject;

  }else {

        $id = $fileObject;

  }

}

And this is wrong one more process to server work and i don't want it, how can i make this work right?

via Chebli Mohamed