How to get the current value of a property when I start my Android Application

Good afternoon experts, I need to get the current value of a property (type NUMBER) when I start my application developed in Android and I can't find the way to do it.

Example: the value of the property  in Thingworx of a remote thing is 30 and I need to load in my application as a Double variable , I have tried with :

try {
                           sensor1 = new SteamThing("sensor1", "sensor1", client);
                            sensor1.addPropertyChangeListener(new VirtualThingPropertyChangeListener() {
                                @Override
                                public void propertyChangeEventReceived(final VirtualThingPropertyChangeEvent evt) {
                                    final String propertyName = evt.getProperty().getPropertyDefinition().getName();
                                    runOnUiThread(new Runnable() {
                                        @Override
                                        public void run() {
                                     
                                            DecimalFormat df = new DecimalFormat("#.##");
                                            if (propertyName.equals("PropertyX")) {
                                                propertyValue = (Double) evt.getPrimitiveValue().getValue();
                                                textview.setText(df.format(propertyValue));                                                                                
                                            }
                                            runOnUiThread(new Runnable() {
                                           
                                            });
                                        }
                                    });
                                }
                            });
                            connect(new VirtualThing[]{sensor1});
                        } catch (Exception e) {
                            Log.e(TAG, "Failed to initalize with error.", e);
                            onConnectionFailed("Failed to initalize with error : " + e.getMessage());
                        }

unsuccessfully,I use this to put in the onConnectionEstablished method the initial value when connecting the app

How else can I do it, thanks!