button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Thread thread = new Thread(new Runnable() {

                    @Override
                    public void run() {
                        weatherApi.getWeather(new WeatherListener() {

                            @Override
                            public void onWeatherReceived(final int celsius) {
                                runOnUiThread(new Runnable() {
                                    @Override
                                    public void run() {
                                        textView.setText("Current weather is " + celsius + "ºC");
                                    }
                                });
                            }

                            @Override
                            public void onWeatherError(Exception exception) {
                                textView.setText("Error getting current weather! Cause: " + exception.getMessage());
                            }
                        });
                    }
                });
                thread.start();
            }
        });