flutterkeepgoing

A new Flutter project.

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• Lab: Write your first Flutter app
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Flutter 数据存储 SpUtil

单例"同步" SharedPreferences 工具类。
支持get获取默认参数、支持存储实体对象、支持存储实体对象数组。

    // 等待Sp初始化完成。
    await SpUtil.getInstance();
    
    SpUtil.getString('key', defValue: '');
    SpUtil.getInt('key', defValue: 0);
  
    /// save object example.
    /// 存储实体对象示例。
    City city = new City();
    city.name = "成都市";
    SpUtil.putObject("loc_city", city);
  
    City hisCity = SpUtil.getObj("loc_city", (v) => City.fromJson(v)); 
    print("thll Str: " + (hisCity == null ? "null" : hisCity.toString()));
  
    /// save object list example.
    /// 存储实体对象List示例。
    List<City> list = new List();
    list.add(new City(name: "成都市"));
    list.add(new City(name: "北京市"));
    SpUtil.putObjectList("loc_city_list", list);
  
    List<City> _cityList = SpUtil.getObjList("loc_city_list", (v) => City.fromJson(v));
    print("thll List: " + (_cityList == null ? "null" : _cityList.toString()));