String json = sharedPrefs.getString("buttons", null);
        if (json != null) {
            Type type = new TypeToken<ArrayList<ButtonToNotification>>() {
            }.getType();
            MySingleton.getOurInstance().getButtonToNotifications().clear();

            ArrayList<ButtonToNotification> arrayList = gson.fromJson(json, type);

            for (int i = 0; i < arrayList.size(); i++) {
                MySingleton.getOurInstance().getButtonToNotifications().add(arrayList.get(i));

            }