创建 Flutter 购物车

Question

我想在我的应用程序中制作一个购物车， 我可以有一些关于如何做到这一点的资源吗？

我所有的手表都是旧的，不是我想要的 这是使用 Firebase 和 Provider

这是模型：

class Summer_d {
  late String Imag;
  late String info;
  late String name;
  late int price;
  late String sub_info;
  late List<dynamic>? sub_img;

 

  Summer_d.fromMap(Map<String,dynamic>data){
    Imag = data["Imag"];
    info = data ["info"];
    name = data ["name"];
    price = data["price"];
    sub_info = data ["sub_info"];
    sub_img = data ["sub_img"];

    
    

  }
}

这是 Provider 类

class SummerNotifier with ChangeNotifier {
  List<Summer_d> _summerList = [];
  late Summer_d _currentsummer;

  int slectedIndex = 0;

  UnmodifiableListView<Summer_d> get summerList =>
      UnmodifiableListView(_summerList);

  Summer_d get currentsummer => _currentsummer;

  set summerList(List<Summer_d> summerList) {
    _summerList = summerList;
    notifyListeners();
  }

  set currentsummer(Summer_d summer_d) {
    _currentsummer = summer_d;
    notifyListeners();
  }
}