Google Glass SimpleWeatherApp getCity function return null

Question

I'm trying do re-adapt simple weather app (http://code.tutsplus.com/tutorials/create-a-weather-app-on-android--cms-21587) to Google Glass, it returns a json object on Android and works, but in my google glass when I want to use the getCity function, I have a null pointer exception error.

My getCity function is the same as the one in SimpleWeatherApp

    public String getCity(){

    return prefs.getString("city", "Jerusalem, IL");
}

Theres is 3 Java Files, 2 Class and 1 Activity.

Citypreference , to return the city and get city.

RemoteFetch to get the Json Object

Main activity to build view for the google glass and show the information that I need.

I can share to you the whole project if you want more informations.

here's a part of my MainActivity content private View buildView() { CardBuilder card = new CardBuilder(this, CardBuilder.Layout.TEXT); card.setText(R.string.open_weather_maps_app_id); //updateWeatherData(new CityPreference(getActivity()).getCity());

    updateWeatherData(new CityPreference().getCity());
       return card.getView();
}


private void updateWeatherData(final String city){
    new Thread(){
        public void run(){
            final JSONObject json = RemoteFetch.getJSON(MainActivity.this.getApplicationContext(),city);
            if(json == null){
                handler.post(new Runnable(){
                    public void run(){
                        Toast.makeText(MainActivity.this,
                                MainActivity.this.getString(R.string.place_not_found), = SO JSON NULL
                                Toast.LENGTH_LONG).show();
                    }
                });
            } else {
                handler.post(new Runnable(){
                    public void run(){
                        renderWeather(json);
                    }
                });
            }
        }
    }.start();
}

So that's mean my json object is null. For the remotefetch.java you can find it in the SimpleWeatherApp link on the top of my post

Answer 1

Modify the code as under

public String getCity(){

    if(prefs != null)
        return prefs.getString("city", "Jerusalem, IL");

    return "city_not_initialized";
}

Or share more code