我实现了添加到购物车功能，成功地将商品添加到购物车中，但当我重新加载dart页面时，购物车徽章中的计数数量没有更新，而计数数量没有更新。有人能帮助我吗？

我实现了添加到购物车功能，成功地将商品添加到购物车中，但当我重新加载dart页面时，购物车徽章中的计数数量没有更新，而计数数量没有更新。有人能帮助我吗？这是我的主页。dart

import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:badges/badges.dart';
import 'package:hospital/BestDeatProducts/best_deal_product_page.dart';
import 'package:hospital/CartPage/pages/cartPage.dart';
import 'package:hospital/Drawer/dropdown_menu.dart';
import 'package:hospital/FirstSection/carousel.dart';
import 'package:hospital/Drawer/drawercontent.dart';
import 'package:hospital/FloatingActionButton/ConsultWithDoctor/consult_with_doctor.dart';
import 'package:hospital/MedicineCateory/medicine_category_page.dart';
import 'package:hospital/SecondSection/second_page.dart';

import 'package:hospital/ThirdSection/third_page.dart';
import 'package:hospital/TrendingProducts/trending_product_page.dart';
import 'package:hospital/constant.dart';
import 'package:hospital/customApiVariable.dart';
import 'package:provider/provider.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'No Internet/connectivity_provider.dart';
import 'No Internet/no_internet.dart';
import 'package:http/http.dart' as http;

class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  SharedPreferences loginData;
  // late String username;

  Future getUsername() async {
    loginData = await SharedPreferences.getInstance();
    setState(() {
      // print("uname" + uname.toString());
      print("dddpppuu1 : responceData_un" +
          loginData.getString('responceData_un').toString());
      print("dddpppuu2 : responceData_ue" +
          loginData.getString('responceData_ue').toString());
      print("dddpppuu3 : responceData_status" +
          loginData.getString('responceData_status').toString());
      String responceData_uid =
          loginData.getString('responceData_uid').toString();
    
      fetchData(responceData_uid);
    });
  }

  var response;

  var addToCartApi;

  @override
  void initState() {
    // TODO: implement initState
    //
    super.initState();

    Provider.of<ConnectivityProvider>(context, listen: false).startMonitering();
// for loading
    getUsername();
  }

  fetchData(String argResponceData_uid) async {
    var api = Uri.parse(
        '$ecommerceBaseUrl/addToCartApi.php?a2rTokenKey=$a2rTokenKey&action=addToCartList&uid=${argResponceData_uid}');
    print('cartpage' + api.toString());

    response = await http.get(api);

    print("Carousel" + response.body);

    addToCartApi = jsonDecode(response.body);
    print('addToCartApi' + addToCartApi['total'].toString());

    print('totalPriceAfterOffer' + totalPriceAfterOffer.toString());

    setState(() {});
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          backgroundColor: kGreen,
          title: Text(
            "BK Arogyam",
            style: TextStyle(fontStyle: FontStyle.italic),
          ),
          actions: [
            
            response != null
                ? Badge(
                    position: BadgePosition.topEnd(top: 3, end: 18),
                    animationDuration: Duration(milliseconds: 300),
                    animationType: BadgeAnimationType.slide,
                    badgeContent: Text(
                      addToCartApi['total']['num'].toString(),
                      style: TextStyle(color: Colors.white),
                    ),
                    child: IconButton(
                        icon: Icon(Icons.shopping_cart),
                        padding: EdgeInsets.only(right: 30.0),
                        onPressed: () {
                          Navigator.push(
                            context,
                            MaterialPageRoute(builder: (context) => Cartpage()),
                          );
                        }),
                  )
                : IconButton(
                    icon: Icon(Icons.shopping_cart),
                    // onPressed: () => print("open cart"),
                    onPressed: () {
                      Navigator.push(
                        context,
                        MaterialPageRoute(builder: (context) => Cartpage()),
                      );
                    },
                  ),
            DropDownMenu(),
          ],
        ),
        floatingActionButton: FloatingActionButton(
          backgroundColor: kGreen,
          onPressed: () => Navigator.push(context,
              MaterialPageRoute(builder: (context) => ConsultWithDoctor())),
          tooltip: 'Consult With Doctor',
          child: Container(
            child: Image(
              image: AssetImage(
                "assets/icons/cwd.png",
              ),
              color: Colors.white,
              width: 40,
              height: 40,
            ),
          ),
        ),
        drawer: Drawer(
          child: DrawerContent(),
        ),
        body: pageUI());
  }

  Widget pageUI() {
    return Consumer<ConnectivityProvider>(
      builder: (consumerContext, model, child) {
        if (model.isOnline != null) {
          return model.isOnline
              ? ListView(
                  children: [
                    Carousel(),
                    SizedBox(
                      height: 10.0,
                    ),
                    MedicineCategoryPage(),
                    SizedBox(
                      height: 10.0,
                    ),
                    SecondPage(),
                    SizedBox(
                      height: 10.0,
                    ),
                    ThirdPage(),
                    SizedBox(
                      height: 10.0,
                    ),
                    TrendingProductPage(),
                    SizedBox(
                      height: 16.0,
                    ),
                    BestDealProductPage(),
                    SizedBox(
                      height: 10.0,
                    ),
                  ],
                )
              : NoInternet();
        }
        return Container(
          child: Center(
            child: CircularProgressIndicator(),
          ),
        );
      },
    );
  }
}