sPref = PreferenceManager.getDefaultSharedPreferences(this);
        for(String s : sPref.getStringSet("Objects",new HashSet<String>())){
            Gson gson = new Gson();
            String json = s;
            Item mItemObject = gson.fromJson(json, Item.class);
            data.add(mItemObject);
        }
        adapter = new ParkingAdapter(data, this);
listView.setAdapter(adapter);