huixiang_app/lib/home/home_page.dart

import 'dart:convert';

import 'package:dio/dio.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_easyloading/flutter_easyloading.dart';
import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
import 'package:flutter_swiper_view/flutter_swiper_view.dart';
import 'package:huixiang/generated/l10n.dart';
import 'package:huixiang/home/home_view/discount_zone.dart';
import 'package:huixiang/home/home_view/home_recommend_goods.dart';
import 'package:huixiang/home/home_view/top_selling_list.dart';
import 'package:huixiang/home/home_view/union_entry.dart';
import 'package:huixiang/home/home_view/welfare_core.dart';
import 'package:huixiang/home/points_mall_view/points_goods_title.dart';
import 'package:huixiang/home/points_mall_view/points_goods_view.dart';
import 'package:huixiang/main.dart';
import 'package:huixiang/data/activity_pos.dart';
import 'package:huixiang/data/article.dart';
import 'package:huixiang/data/banner.dart';
import 'package:huixiang/data/base_data.dart';
import 'package:huixiang/data/brand.dart';
import 'package:huixiang/data/coupon.dart';
import 'package:huixiang/data/founder.dart';
import 'package:huixiang/data/goods.dart';
import 'package:huixiang/data/goods_category.dart';
import 'package:huixiang/data/home_rank.dart';
import 'package:huixiang/data/login_info.dart';
import 'package:huixiang/data/page.dart';
import 'package:huixiang/retrofit/retrofit_api.dart';
import 'package:huixiang/utils/event_type.dart';
import 'package:huixiang/view_widget/activity_coupons.dart';
import 'package:huixiang/view_widget/activity_poster.dart';
import 'package:huixiang/view_widget/classic_header.dart';
import 'package:huixiang/view_widget/invite_success_dialog.dart';
import 'package:huixiang/view_widget/request_permission.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:pull_to_refresh/pull_to_refresh.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';

import '../data/user_info.dart';
import '../utils/flutter_utils.dart';
import '../view_widget/channel_dialog.dart';
import '../view_widget/custom_image.dart';
import 'home_view/happy_help_farmers.dart';
import 'home_view/shortcut_operation.dart';

class HomePage extends StatefulWidget {
  final Function changeTab;
  final String? invite;
  final List<InterviewCouponList>? interviewCouponList;
  final List<FirstLoginCouponList>? firstLoginCouponList;

  HomePage(Key key, this.changeTab,
      {this.invite, this.interviewCouponList, this.firstLoginCouponList})
      : super(key: key);

  @override
  State<StatefulWidget> createState() {
    return HomePageState();
  }
}

class HomePageState extends State<HomePage> with AutomaticKeepAliveClientMixin {
  ApiService? apiService;
  final RefreshController refreshController = RefreshController();
  String? categoryId;
  bool showInvite = false;
  bool showNew = false;

  //排序类型枚举：1-自然排序，2-销量，3-价格
  int orderType = 1;

  //是否降序排列
  bool orderDesc = true;
  List<Goods> goods = [];
  List<GoodsCategory> gooodsCategorys = [];
  List<BannerData> bannerData = [];
  List<BannerData> activityBannerData = [];
  List<Brand> brandData = [];
  List<Article> articles = [];
  Founder? founder;
  bool isSigned = false;
  int totalMsg = 0;
  List<Coupon> coupons = [];
  int state = 1;
  HomeRank? homeRank;
  UserInfo? userInfo;
  dynamic mRaiseMoney = 0; //众筹金余额
  int _loadCount = 0;
  DioExceptionType? dioErrorType;

  @override
  void initState() {
    super.initState();

    eventBus.on<EventType>().listen((event) {
      if (event.type < 3) {
        setState(() {});
      }
    });
    _onRefresh(isFirstIn: true);
    if (showInvite) {
      inviteShowAlertDialog(widget.invite, widget.interviewCouponList?[0]);
      showInvite = false;
    }

    if ((widget.invite?.isNotEmpty ?? false) || (widget.interviewCouponList?.isNotEmpty ?? false)) {
      showInvite = true;
    }

    //判断新人弹窗
    // if (widget.firstLoginCouponList != null && widget.firstLoginCouponList.length > 0)
    //   showNew = true;
  }

  ///邀请成功
  inviteShowAlertDialog(invite, InterviewCouponList? interviewCouponList) {
    //显示对话框
    showDialog(
      context: context,
      builder: (BuildContext context) {
        return InviteSuccessDialog(invite, interviewCouponList);
      },
    );
  }

  ///活动海报弹窗
  posterShowAlertDialog(ActivityPos? activityPos, firstLoginCouponList) {
    var today = DateTime.now().day;
    SharedPreferences.getInstance().then((value) {
      if (value.getInt("today") == today &&
          (value.getString("ActivityPosCode") ?? "")
              .contains("${activityPos?.code}_${value.getString("userId")};"))
        return;
      value.setString("ActivityPosCode",
          "${(value.getString("ActivityPosCode") ?? "")}${activityPos?.code}_${value.getString("userId")};");
      value.setInt("today", today);
      //显示对话框
      showDialog(
        context: context,
        builder: (BuildContext context) {
          return ActivityPoster(activityPos, firstLoginCouponList);
        },
      );
    });
  }

  ///推荐渠道弹窗
  channelShowAlertDialog() {
    //显示对话框
    showDialog(
      context: context,
      builder: (BuildContext context) {
        return ChannelDialog();
      },
    );
  }

  ///头部banner
  queryBanner() async {
    try {
      BaseData<PageInfo<BannerData>>? baseData = await apiService?.queryBanner({
        "model": {"type": "HOME_PAGE"},
      }).catchError((onError) {
        dioErrorType = onError.type;
      });
      if (baseData?.isSuccess ?? false) {
        bannerData = baseData?.data?.records ?? [];
        // if (bannerData.length > 0) swiperController.move(0, animation: false);
      }
    } finally {
      addLoadCount();
    }
  }

  ///宣传banner
  queryActivityBanner() async {
    try {
      BaseData<PageInfo<BannerData>>? baseData = await apiService?.queryBanner({
        "model": {"type": "HOME_STORE_PAGE"},
      }).catchError((onError) {});
      if (baseData?.isSuccess ?? false) {
        activityBannerData = baseData!.data?.records ?? [];
      }
    } finally {
      addLoadCount();
    }
  }

  addLoadCount() {
    _loadCount += 1;
    if (_loadCount == 7) {
      _loadCount = 0;
      EasyLoading.dismiss();
      String toastText = AppUtils.dioErrorTypeToString(dioErrorType);
      if (toastText.isNotEmpty ?? false) {
        SmartDialog.showToast(toastText,
            alignment: Alignment.center);
      }
      refreshController.refreshFailed();
          if (mounted) setState(() {});
    }
  }

  ///推荐排行
  queryRecommendRank() async {
    try {
      BaseData<HomeRank>? rank = await apiService?.recommendRank().catchError((onError) {});
      if (rank?.isSuccess ?? false) {
        homeRank = rank!.data;
      }
    } finally {
      addLoadCount();
    }
  }

  ///积分商城商品分類列表
  queryGoodsCategory() async {
    try {
      BaseData<PageInfo<GoodsCategory>>? dataCategory = await apiService?.goodsCategory({
        "current": 1,
        "map": {},
        "model": {"pageNum": 1, "pageSize": 20, "searchKey": ""},
        "order": "descending",
        "size": 20,
        "sort": "sortOrder"
      }).catchError((onError) {});
      if ((dataCategory?.isSuccess ?? false) && (dataCategory!.data?.records?.isNotEmpty ?? false)) {
        gooodsCategorys.clear();
        gooodsCategorys.add(GoodsCategory()..name = S.of(context).quanbu);
        gooodsCategorys.addAll(dataCategory.data?.records ?? []);
      }
    } finally {
      addLoadCount();
    }
  }

  ///积分商城商品列表
  queryPointsProductList(bool isRefresh) async {
    try {
      if (!isRefresh)
        EasyLoading.show(
            status: S.current.zhengzaijiazai,
            maskType: EasyLoadingMaskType.black);
      var param = {
        "categoryId": categoryId ?? "",
        "orderDesc": orderDesc,
        "orderType": orderType,
        "pageNum": 1,
        "pageSize": 100,
        "state": 1
      };
      BaseData<PageInfo<Goods>>? pageGoods = await apiService?.creditGoods(param).catchError((onError) {});
      if (pageGoods?.isSuccess ?? false) {
        goods = pageGoods?.data?.list ?? [];
      }
    } finally {
      if (isRefresh)
        addLoadCount();
      else {
        EasyLoading.dismiss();
        setState(() {});
      }
    }
  }

  ///查询会员信息
  queryUserBalance() async {
    try {
      BaseData<UserInfo>? baseData = await apiService?.queryInfo().catchError((onError) {});
      if (baseData?.isSuccess ?? false) {
        userInfo = baseData!.data;
        mRaiseMoney = double.tryParse("${userInfo?.raiseMoney}") ?? 0;
      }
    } finally {
      addLoadCount();
    }
  }

  ///消息数量
  // queryMsgStats() async {
  //   if (apiService == null) {
  //     SharedPreferences value = await SharedPreferences.getInstance();
  //     apiService = ApiService(
  //       Dio(),
  //       context: context,
  //       token: value.getString("token"),
  //     );
  //   }
  //   BaseData<List<MsgStats>> baseData = await apiService.stats().catchError((onError) {});
  //   if (baseData != null && baseData.isSuccess) {
  //     // setState(() {
  //       totalMsg = 0;
  //       baseData.data.forEach((element) {
  //         totalMsg += element.number;
  //       // });
  //     });
  //   }
  //   EasyLoading.dismiss();
  // }

  ///活动弹窗
  queryActivity() async {
    BaseData<ActivityPos>? baseData = await apiService?.appPopup().catchError((onError) {});
    if (baseData?.isSuccess ?? false) {
      if (baseData!.data?.enabled ?? true)
        posterShowAlertDialog(baseData.data, widget.firstLoginCouponList);
    }
  }

  ///核销用户优惠券
  queryWiped(memberCouponId) async {
    BaseData? baseData = await apiService?.wiped(memberCouponId).catchError((onError) {});
    if (baseData?.isSuccess ?? false) {
      SmartDialog.showToast("核销成功", alignment: Alignment.center);
    } else {
      SmartDialog.showToast("${baseData?.msg}", alignment: Alignment.center);
    }
  }

  queryCoupon() async {
    try {
      BaseData<PageInfo<Coupon>>? baseData = await apiService?.queryCoupon({
        "centre": true,
        "pageNum": 1,
        "pageSize": 10,
        "searchKey": "",
        "state": 0
      }).catchError((onError) {});
      if (baseData?.isSuccess ?? false) {
        coupons = baseData!.data?.list ?? [];
      }
    } finally {
      addLoadCount();
    }
  }

  _onRefresh({bool isFirstIn = false}) async {
    EasyLoading.show(
        status: S.current.zhengzaijiazai, maskType: EasyLoadingMaskType.black);
    dioErrorType = null;
    if (isFirstIn) queryActivity();
    queryBanner();
    queryActivityBanner();
    queryRecommendRank();
    queryGoodsCategory();
    queryPointsProductList(true);
    queryUserBalance();
    // queryMsgStats();
    queryCoupon();
  }

  @override
  void dispose() {
    super.dispose();
    refreshController.dispose();
  }

  @override
  Widget build(BuildContext context) {
    super.build(context);
    return Column(
      children: [
        // MyAppBar(
        //   title: "首页",
        //   leading: false,
        //   actions: [
        //     Container(
        //       height: 24,
        //       alignment: Alignment.center,
        //       margin: EdgeInsets.only(
        //         right: 12.w,
        //       ),
        //       child: GestureDetector(
        //           onTap: () {
        //             Navigator.of(context).pushNamed('/router/system_msg_page').then((value) {
        //               setState(() {
        //                 totalMsg = 0;
        //               });
        //             });
        //             // Navigator.of(context).pushNamed('/router/web_turntable_activity');
        //           },
        //           child: Container(
        //             height: 24,
        //             alignment:Alignment.center,
        //             child:Stack(
        //               children: [
        //                 SvgPicture.asset(
        //                   "assets/svg/tixing.svg",
        //                   width: 24,
        //                   height: 24,
        //                 ),
        //                 if(totalMsg != 0)
        //                 Container(
        //                   width:36,
        //                   alignment: Alignment.topRight,
        //                   child:Container(
        //                       width:22,
        //                       height:14,
        //                       decoration: BoxDecoration(
        //                         borderRadius: BorderRadius.circular(100),
        //                         border: Border.all(
        //                           width: 1,
        //                           color: Colors.white,
        //                           style: BorderStyle.solid,
        //                         ),
        //                         color:Color(0xFFFF441A),
        //                       ),
        //                       child:RoundButton(
        //                         text:totalMsg.toString(),
        //                         textColor: Colors.white,
        //                         fontWeight: MyFontWeight.regular,
        //                         backgroup: Color(0xFFFF441A),
        //                         fontSize:8.sp,
        //                         radius: 100,
        //                       )
        //                   ),
        //                 )
        //               ],
        //             ),
        //           )
        //       )
        //     ),
        //     Container(
        //       margin: EdgeInsets.only(right: 16.w),
        //       child: GestureDetector(
        //         onTap: () {
        //           toScan();
        //         },
        //         child: SvgPicture.asset(
        //           "assets/svg/saoyisao.svg",
        //           width: 24,
        //           height: 24,
        //         ),
        //       ),
        //     ),
        //   ],
        // ),
        Expanded(
          child: Container(
            child: SmartRefresher(
              controller: refreshController,
              enablePullDown: true,
              enablePullUp: false,
              header: MyHeader(),
              physics: BouncingScrollPhysics(),
              onRefresh: _onRefresh,
              child: SingleChildScrollView(
                  physics: NeverScrollableScrollPhysics(),
                  child: Column(
                    children: [
                      ///banner
                      homeBanner(),

                      ///吃喝玩
                      UnionEntry((int jpIndex) {
                        widget.changeTab(1, jpIndex);
                      }),

                      ///快捷操作
                      ShortcutOperation((int jpIndex) {
                        widget.changeTab(1, jpIndex);
                      }),

                      ///推广图
                      if(activityBannerData.length > 0)
                      spread(),

                      // ///签到
                      // SignView(isSigned, (value) {
                      //   setState(() {
                      //     isSigned = value;
                      //   });
                      // }),

                      ///特惠专区
                      if (coupons.length != 0)
                        DiscountZone(coupons),

                      ///特惠专区-推荐商品展示
                      if (homeRank?.commodityZone?.isNotEmpty ?? false)
                        HomeRecommendGoods(homeRank),

                    if(homeRank?.commodityZone?.isEmpty ?? true)
                    SizedBox(height: 20.h,),

                    ///助农专区
                    // if(mRaiseMoney != 0)
                    HappyHelpFarmers(),

                      ///福利中心
                      WelfareCore(),

                      ///吃喝玩商品热销榜
                      if (homeRank?.commodityList?.isNotEmpty ?? false)
                        TopSellingList(homeRank),

                      // ///店铺推荐
                      // QuickOrder(),

                      // ///超级优惠券
                      // CouponView(),

                      // ///精选活动
                      // FeaturedActivity(),

                      // ///积分商城
                      // HomeIntegralStore(gooods),

                      ///积分商品头Tab
                      PointsGoodsTitle(
                        gooodsCategorys,
                        (orderType, orderDesc) {
                          this.orderType = orderType;
                          this.orderDesc = orderDesc;
                          queryPointsProductList(false);
                        },
                        (index) {
                          categoryId = gooodsCategorys[index].id;
                          queryPointsProductList(false);
                        },
                      ),

                      ///积分商品列表
                      PointGoods(
                        goods,
                        (index) {
                          _toDetails(index);
                        },
                      ),
                    ],
                  )),
            ),
          ),
        ),
        SizedBox(
          height: 80.h,
        ),
      ],
    );
  }

  Widget homeBanner() {
    return Container(
      child: AspectRatio(
        aspectRatio: 1.25,
        child: bannerData.isNotEmpty
            ? Swiper(
                pagination: SwiperPagination(
                  margin: EdgeInsets.only(bottom: 12.h),
                  alignment: Alignment.bottomCenter,
                  builder: DotSwiperPaginationBuilder(
                    size: 8,
                    activeSize: 8,
                    space: 5,
                    activeColor: Colors.white,
                    color: Colors.white.withAlpha(76),
                  ),
                ),
                autoplay: true,
                duration: 1000,
                autoplayDelay: 2000,
                physics: BouncingScrollPhysics(),
                itemBuilder: (context, position) {
                  return InkWell(
                    onTap: () {
                      bannerClick(bannerData[position]);
                    },
                    child: Container(
                      child: MImage(
                        bannerData[position].imgUrl ?? "",
                        fit: BoxFit.cover,
                        errorSrc: "assets/image/default_2_1.webp",
                        fadeSrc: "assets/image/default_2_1.webp",
                      ),
                    ),
                  );
                },
                itemCount: bannerData.length,
              )
            : Image.asset(
                "assets/image/default_2_1.webp",
                fit: BoxFit.cover,
              ),
      ),
    );
  }

  /// contentType     跳转类型（0：不跳转，1：积分商品，2：活动，3：文章,4:页面跳转,5:课程，7：门店跳转）
  bannerClick(BannerData bannerData) async {
    switch (bannerData.contentType) {
      case 1:
        Navigator.of(context).pushNamed('/router/integral_store_page',
            arguments: {"goodsId": bannerData.content});
        break;
      case 2:
        Navigator.of(context).pushNamed('/router/web_page', arguments: {
          "activityId": bannerData.content,
        });
        break;
      case 3:
        Navigator.of(context).pushNamed('/router/web_page', arguments: {
          "articleId": bannerData.content,
        });
        break;
      case 4:
        String? router = bannerData.content;
        if (router?.isEmpty ?? true) {
          return;
        }
        // String router = "/router/store_order?{\"id\":\"1512378184161558528\",\"tenant\":\"1188\",\"storeName\":\"农场煮意\"}";
        if (router!.contains("?")) {
          String params = router.substring(router.indexOf("?") + 1);
          Map map = jsonDecode(params);
          Navigator.of(context).pushNamed(
              router.substring(0, router.indexOf("?")),
              arguments: map);
        } else {
          Navigator.of(context).pushNamed(router);
        }
        break;
      case 5:
        Navigator.of(context).pushNamed('/router/class_details', arguments: {
          "id": bannerData.content,
        });
        break;
      case 7:
        String? router = bannerData.content;
        if (router?.isEmpty ?? true) {
          return;
        }
        String params = router!.substring(router.indexOf("?") + 1);
        Map map = jsonDecode(params);
        Navigator.of(context).pushNamed(router.substring(0, router.indexOf("?")), arguments: map);
        break;
    }
  }

  Widget spread() {
    return Container(
      width: double.infinity,
      // margin: EdgeInsets.symmetric(horizontal:14.w),
      height: 85.h,
      child: activityBannerData.isNotEmpty
          ? Swiper(
              pagination: SwiperPagination(
                alignment: Alignment.bottomCenter,
                margin: EdgeInsets.only(top: 5.h,),
                builder: DotSwiperPaginationBuilder(
                  size: 8.w,
                  activeSize: 8.w,
                  space: 5.w,
                  activeColor: Colors.white,
                  color: Colors.white.withAlpha(76),
                ),
              ),
              autoplay: true,
              duration: 1000,
              autoplayDelay: 2000,
              itemBuilder: (context, position) {
                return InkWell(
                  onTap: () {
                    spreadBannerClick(activityBannerData[position]);
                  },
                  child: Container(
                    margin: EdgeInsets.symmetric(horizontal: 14.w),
                    child: MImage(
                      activityBannerData[position].imgUrl ?? "",
                      fit: BoxFit.cover,
                      radius: BorderRadius.circular(6),
                      errorSrc: "assets/image/default_2_1.webp",
                      fadeSrc: "assets/image/default_2_1.webp",
                    ),
                  ),
                );
              },
              itemCount: activityBannerData.length,
            )
          : Image.asset(
              "assets/image/default_2_1.webp",
              fit: BoxFit.cover,
            ),
    );
  }

  /// contentType     跳转类型（0：不跳转，1：积分商品，2：活动，3：文章,4:页面跳转,5:课程，7：门店跳转）
  spreadBannerClick(BannerData activityBannerData) async {
    switch (activityBannerData.contentType) {
      case 1:
        Navigator.of(context).pushNamed('/router/integral_store_page',
            arguments: {"goodsId": activityBannerData.content});
        break;
      case 2:
        Navigator.of(context).pushNamed('/router/web_page', arguments: {
          "activityId": activityBannerData.content,
        });
        break;
      case 3:
        Navigator.of(context).pushNamed('/router/web_page', arguments: {
          "articleId": activityBannerData.content,
        });
        break;
      case 4:
        String? router = activityBannerData.content;
        if (router?.isEmpty ?? true) {
          return;
        }
        // String router = "/router/store_order?{\"id\":\"1512378184161558528\",\"tenant\":\"1188\",\"storeName\":\"农场煮意\"}";
        if (router!.contains("?")) {
          String params = router.substring(router.indexOf("?") + 1);
          Map map = jsonDecode(params);
          Navigator.of(context).pushNamed(
              router.substring(0, router.indexOf("?")),
              arguments: map);
        } else {
          Navigator.of(context).pushNamed(router);
        }
        break;
      case 5:
        Navigator.of(context).pushNamed('/router/class_details', arguments: {
          "id": activityBannerData.content,
        });
        break;
      case 7:
        String? router = activityBannerData.content;
        if (router?.isEmpty ?? true) {
          return;
        }
        String params = router!.substring(router.indexOf("?") + 1);
        Map map = jsonDecode(params);
        Navigator.of(context).pushNamed(
            router.substring(0, router.indexOf("?")),
            arguments: map,
        );
        break;
    }
  }

  ///扫码
  toScan() async {
    if (await Permission.camera.isPermanentlyDenied) {
      showCupertinoDialog(
          context: context,
          builder: (context) {
            return RequestPermission(
              "assets/image/icon_camera_permission_tips.webp",
              S.of(context).ninxiangjiquanxianweikaiqi,
              S.of(context).weilekaipaizhaoxuanzhetouxiang,
              S.of(context).kaiqiquanxian,
              (result) async {
                if (result) {
                  await openAppSettings();
                }
              },
              heightRatioWithWidth: 0.82,
            );
          });
    } else if (await Permission.camera.isGranted) {
      // http://pos.app.gznl.top/placeorder/?tableId=1315903669597634560&tenantCode=1166&shopId=1300372027722432512
      // 新版桌子码跳转
      // http://miniscan.lotus-wallet.com/placeorder?tenant_code=1194&table_id=1669609340031467520&store_id=1637659387134738432
      var result = await Navigator.of(context).pushNamed('/router/qr_scan');
      if (result == null || result !is String || (result as String).isEmpty) {
        return;
      }
      if (result.contains("type\":\"coupon")) {
        ///活动优惠券赠送弹窗
        activityShowAlertDialog(result.toString());
        return;
      }
      if (result.contains("type\":\"wiped")) {
        ///核销券
        queryWiped(jsonDecode(result.toString())["memberCouponId"]);
        return;
      }
      // String result = await scanner.scan();
      Uri uri = Uri.parse(result);
      String tableId = uri.queryParameters["tableId"] ?? uri.queryParameters["table_id"] ?? "";
      String tenantCode = uri.queryParameters["tenantCode"] ?? uri.queryParameters["tenant_code"] ?? "";
      String shopId = uri.queryParameters["shopId"] ?? uri.queryParameters["store_id"] ?? "";
      if (tableId != "" &&
          tenantCode != "" &&
          shopId != "") {
        Navigator.of(context).pushNamed(
          '/router/store_order',
          arguments: {
            "id": shopId,
            "tenant": tenantCode,
            "storeName": "",
            "tableId": int.tryParse(tableId),
          },
        );
      }
    } else {
      showCupertinoDialog(
          context: context,
          builder: (context) {
            return RequestPermission(
              "assets/image/icon_camera_permission_tips.webp",
              S.of(context).ninxiangjiquanxianweikaiqi,
              S.of(context).weilekaipaizhaoxuanzhetouxiang,
              S.of(context).kaiqiquanxian,
              (result) async {
                if (result) {
                  await Permission.camera.request();
                }
              },
              heightRatioWithWidth: 0.82,
            );
          },
      );
    }
  }

  _toDetails(index) async {
    Navigator.of(context).pushNamed(
      '/router/integral_store_page',
      arguments: {"goodsId": goods[index].id},
    );
  }

  activityShowAlertDialog(String result) {
    //显示对话框
    showDialog(
      context: context,
      builder: (BuildContext context) {
        return ActivityCoupons(result);
      },
    );
  }

  @override
  bool get wantKeepAlive => true;
}