try
                        {
                            new AsyncTask<Void, Void, Void>() {

                                @Override
                                protected Void doInBackground( Void... voids ) {
                                    try
                                    {
                                        URL url = new URL(SERVER_URI + "/notifications/add");
                                        HttpURLConnection httpCon = (HttpURLConnection) url.openConnection();
                                          httpCon.setDoOutput(true);
                                        // httpCon.setRequestProperty("Content-Type", "application/x-www-form-urlencoded" );
                                        //  httpCon.setRequestMethod("DELETE");
                                        httpCon.setRequestMethod("POST");
                                        httpCon.setRequestProperty("Accept", "application/json");

                                        httpCon.connect();
                                        String jsonNotification = new Gson().toJson(notification);
                                        DataOutputStream wr = new DataOutputStream(httpCon.getOutputStream());
                                        wr.writeBytes(jsonNotification);
                                        wr.flush();
                                        wr.close();

                                    } catch(IOException e)
                                    {
                                        e.printStackTrace();
                                    }
                                    return null;
                                }
                            }.execute().get();
                        } catch(InterruptedException e)
                        {
                            e.printStackTrace();
                        } catch(ExecutionException e)
                        {
                            e.printStackTrace();
                        }