save arraylist in shared preference

Question

I am storing values in ArrayList and pass it to using bundle to next Fragment, and there I set values to my TextView, till here it wor

Answer 1

You can use gson:

To Save Preferences:

 public void save_User_To_Shared_Prefs(Context context, List users) {
        SharedPreferences settings;
        Editor editor;

        settings = context.getSharedPreferences(PREFS_NAME,
                Context.MODE_PRIVATE);
        editor = settings.edit();

        Gson gson = new Gson();
        String jsonUsers = gson.toJson(users);

        editor.putString(USERS, jsonUsers);

        editor.commit();
    }

To get Preferences:

public ArrayList getUsers(Context context) {
        SharedPreferences settings;
        List users;

        settings = context.getSharedPreferences(PREFS_NAME,
                Context.MODE_PRIVATE);

        if (settings.contains(USERS)) {
            String jsonUsers = settings.getString(USERS, null);
            Gson gson = new Gson();
            User[] userItems = gson.fromJson(jsonUsers,
                    User[].class);

            users = Arrays.asList(userItems);
            users= new ArrayList(users);
        } else
            return null;

        return (ArrayList) users;
    }

To add user:

public void addUser(Context context, User user) {
        List favorites = getUsers(context);
        if (users == null)
            users = new ArrayList();
        users.add(user);
        save_User_To_Shared_Prefs(context, users);
    }