huixiang_app/lib/home/help_farmers/help_farmers_page.dart

import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
import 'package:flutter_staggered_grid_view/flutter_staggered_grid_view.dart';
import 'package:huixiang/data/base_list_data.dart';
import 'package:huixiang/data/farmers.dart';
import 'package:huixiang/data/good_list.dart';
import 'package:huixiang/generated/l10n.dart';
import 'package:huixiang/home/help_farmers/farmers_tab.dart';
import 'package:huixiang/retrofit/retrofit_api.dart';
import 'package:pull_to_refresh/pull_to_refresh.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:shimmer/shimmer.dart';

import '../../utils/flutter_utils.dart';
import '../../utils/font_weight.dart';
import '../../view_widget/custom_image.dart';
import '../../view_widget/my_tab.dart';
import '../../view_widget/no_data_view.dart';

class HelpFarmersPage extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _HelpFarmersPage();
  }
}

class _HelpFarmersPage extends State<HelpFarmersPage> {
  ApiService? apiService;
  final RefreshController refreshController = RefreshController();
  List<Farmers> farmersList = [];
  int tabIndex = 0;
  int farmersListData = 0;
  int networkStatus = 0;
  String dataErrorText = "";

  @override
  void initState() {
    super.initState();
    SharedPreferences.getInstance().then((value) => {
          apiService = ApiService(Dio(),
              context: context,
              token: value.getString('token'),
              showLoading: true),
          queryConfig(),
        });
  }

  ///助农列表
  queryConfig() async {
    try {
      BaseListData<Farmers>? baseData =
          await apiService?.getConfig().catchError((error) {
        SmartDialog.showToast(AppUtils.dioErrorTypeToString(error.type),
            alignment: Alignment.center);
        networkStatus = -1;
        refreshController.refreshFailed();
        return BaseListData<Farmers>()..isSuccess = false;
      });
      if (baseData?.isSuccess ?? false) {
        farmersList.clear();
        farmersList.addAll(baseData?.data ?? []);
        refreshController.refreshCompleted();
        networkStatus = 1;
      } else {
        refreshController.refreshFailed();
        farmersListData = 1;
        dataErrorText = baseData?.msg ?? "";
        networkStatus = 2;
      }
    } finally {
      setState(() {});
      SmartDialog.dismiss();
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.transparent,
      body: networkStatus == 0
          ? recommendSm()
          : (networkStatus == 2
              ? Container(
                  color: Colors.white,
                  child: NoDataView(
                    src: "assets/image/xiao_fei.webp",
                    isShowBtn: false,
                    text: dataErrorText,
                    fontSize: 16.sp,
                    margin:
                        EdgeInsets.only(top: 120.h, left: 60.w, right: 60.w),
                  ))
              : NestedScrollView(
                  headerSliverBuilder: (context, inner) {
                    return [
                      SliverAppBar(
                        pinned: true,
                        backgroundColor: Colors.white,
                        elevation: 0,
                        leading: GestureDetector(
                          onTap: () {
                            Navigator.of(context).pop();
                          },
                          child: Container(
                            alignment: Alignment.centerRight,
                            margin: EdgeInsets.only(left: 10.w),
                            padding: EdgeInsets.all(6),
                            child: Icon(
                              Icons.arrow_back_ios,
                              color: Colors.white,
                              size: 24,
                            ),
                          ),
                        ),

                        ///去掉返回按钮
                        // automaticallyImplyLeading: false,
                        centerTitle: true,
                        flexibleSpace: FlexibleSpaceBar(
                          background: MImage(
                            farmersList.isEmpty
                                ? ""
                                : (farmersList[tabIndex].agriculturaListImg ??
                                    ""),
                            fit: BoxFit.fill,
                            width: double.infinity,
                            height: 354.h,
                            errorSrc: "assets/image/default_1.webp",
                            fadeSrc: "assets/image/default_1.webp",
                          ),
                        ),
                        expandedHeight: 354.h,
                        bottom: PreferredSize(
                          preferredSize: Size(double.infinity, 0),
                          child: DefaultTabController(
                            length: farmersList.length,
                            child: Container(
                              alignment: Alignment.center,
                              decoration: BoxDecoration(
                                borderRadius: BorderRadius.vertical(
                                  top: Radius.circular(16),
                                ),
                                color: Color(0xFF32A060),
                              ),
                              padding: EdgeInsets.only(top: 7.h, bottom: 7.h),
                              child: TabBar(
                                isScrollable: true,
                                //可滚动
                                indicatorColor: Colors.white,
                                //tab排放方向
                                tabAlignment: TabAlignment.start,
                                //去掉底部线条
                                dividerHeight: 0,
                                labelColor: Colors.white,
                                labelStyle: TextStyle(
                                  fontSize: 16.sp,
                                  fontWeight: FontWeight.bold,
                                ),
                                unselectedLabelStyle: TextStyle(
                                  fontSize: 14.sp,
                                  fontWeight: MyFontWeight.regular,
                                ),
                                indicator: FarmersTab(),
                                // controller: tabController,
                                //未选中文字颜色
                                unselectedLabelColor: Colors.white,
                                indicatorSize: TabBarIndicatorSize.label,
                                //指示器与文字等宽
                                tabs: farmersList
                                    .map((e) => MyTab(text: "${e.typeName}"))
                                    .toList(),
                                onTap: (index) {
                                  // queryConfig("AgriculturalList");
                                  tabIndex = index;
                                  queryConfig();
                                  setState(() {});
                                },
                              ),
                            ),
                          ),
                        ),
                      ),
                    ];
                  },
                  body: recommend(),
                )),
    );
  }

  ///为你推荐
  Widget recommend() {
    return Container(
      color: Colors.white,
      padding: EdgeInsets.symmetric(horizontal: 10.w),
      child: (farmersList.isEmpty ||
              (farmersList[tabIndex].goodList ?? []).isEmpty)
          ? NoDataView(
              src: "assets/image/xiao_fei.webp",
              isShowBtn: false,
              text: "当前分类暂无商品",
              fontSize: 16.sp,
              margin: EdgeInsets.only(top: 120.h, left: 60.w, right: 60.w),
            )
          : StaggeredGrid.count(
              crossAxisCount: 2,
              mainAxisSpacing: 10,
              crossAxisSpacing: 10,
              children: farmersList[tabIndex].goodList?.map((e) {
                    return GestureDetector(
                      onTap: () {
                        Navigator.of(context).pushNamed(
                          '/router/shop_details_page',
                          arguments: {
                            "id": e.id,
                            "storeId": e.storeId,
                          },
                        );
                      },
                      child: recommendItem(e),
                    );
                  }).toList() ??
                  [],
            ),
    );
  }

  Widget recommendItem(GoodList goodList) {
    return Container(
      width: 173,
      decoration: BoxDecoration(
        borderRadius: BorderRadius.circular(6),
        boxShadow: [
          BoxShadow(
            color: Color(0x1A213303),
            offset: Offset(0, 2),
            blurRadius: 4,
            spreadRadius: 0,
          )
        ],
        color: Colors.white,
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          MImage(
            goodList.productImg ?? "",
            fit: BoxFit.fill,
            width: double.infinity,
            height: 174,
            radius: BorderRadius.only(
              topLeft: Radius.circular(6),
              topRight: Radius.circular(6),
            ),
            errorSrc: "assets/image/default_1.webp",
            fadeSrc: "assets/image/default_1.webp",
          ),
          Padding(
            padding: EdgeInsets.only(
              top: 7.h,
              left: 10.w,
              bottom: 8.h,
            ),
            child: Text(
              goodList.productName ?? "",
              maxLines: 2,
              overflow: TextOverflow.ellipsis,
              style: TextStyle(
                fontSize: 14.sp,
                height: 1.3.h,
                fontWeight: MyFontWeight.medium,
                color: Color(0xFF0D0D0D),
              ),
            ),
          ),
          Padding(
            padding: EdgeInsets.only(left: 10.w, bottom: 12.h),
            child: Row(
              children: [
                Text(
                  AppUtils.calculateDouble(
                      double.tryParse("${goodList.price}") ?? 0),
                  style: TextStyle(
                    fontSize: 24.sp,
                    fontFamily: 'APPHT',
                    fontWeight: MyFontWeight.medium,
                    color: Color(0xFF32A060),
                  ),
                ),
                Container(
                  margin: EdgeInsets.only(left: 8.w),
                  padding: EdgeInsets.symmetric(vertical: 3.h, horizontal: 9.w),
                  decoration: BoxDecoration(
                    borderRadius: BorderRadius.circular(100),
                    boxShadow: [
                      BoxShadow(
                        color: Color(0x1A213303),
                        offset: Offset(0, 2),
                        blurRadius: 4,
                        spreadRadius: 0,
                      ),
                    ],
                    color: Color(0xFF32A060),
                  ),
                  child: Text(
                    S.of(context).zhunongjifen,
                    style: TextStyle(
                      fontSize: 12.sp,
                      fontWeight: MyFontWeight.medium,
                      color: Colors.white,
                    ),
                  ),
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }

  Widget recommendSm() {
    return Container(
      width: double.infinity,
      decoration: BoxDecoration(
          color: Colors.white,
          borderRadius: BorderRadius.all(Radius.circular(6)),
          boxShadow: [
            BoxShadow(
              color: Colors.black.withAlpha(25),
              offset: Offset(0, 1),
              blurRadius: 12,
              spreadRadius: 0,
            )
          ]),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Shimmer.fromColors(
            baseColor: Color(0XFFD8D8D8),
            highlightColor: Color(0XFFD8D8D8),
            child: Container(
              color: Color(0XFFD8D8D8),
              width: double.infinity,
              height: 289.h,
            ),
          ),
          Row(
            children: [
              Padding(
                padding: EdgeInsets.only(left: 6.w, bottom: 5.h, top: 12.h),
                child: Shimmer.fromColors(
                  baseColor: Color(0XFFD8D8D8),
                  highlightColor: Color(0XFFD8D8D8),
                  child: Container(
                    decoration: BoxDecoration(
                      color: Color(0XFFD8D8D8),
                      borderRadius: BorderRadius.circular(2),
                    ),
                    width: 64.w,
                    height: 20.h,
                  ),
                ),
              ),
              Padding(
                padding: EdgeInsets.only(left: 12.w, bottom: 5.h, top: 12.h),
                child: Shimmer.fromColors(
                  baseColor: Color(0XFFD8D8D8),
                  highlightColor: Color(0XFFD8D8D8),
                  child: Container(
                    decoration: BoxDecoration(
                      color: Color(0XFFD8D8D8),
                      borderRadius: BorderRadius.circular(2),
                    ),
                    width: 64.w,
                    height: 20.h,
                  ),
                ),
              ),
              Padding(
                padding: EdgeInsets.only(left: 12.w, bottom: 5.h, top: 12.h),
                child: Shimmer.fromColors(
                  baseColor: Color(0XFFD8D8D8),
                  highlightColor: Color(0XFFD8D8D8),
                  child: Container(
                    decoration: BoxDecoration(
                      color: Color(0XFFD8D8D8),
                      borderRadius: BorderRadius.circular(2),
                    ),
                    width: 64.w,
                    height: 20.h,
                  ),
                ),
              ),
              Padding(
                padding: EdgeInsets.only(left: 12.w, bottom: 5.h, top: 12.h),
                child: Shimmer.fromColors(
                  baseColor: Color(0XFFD8D8D8),
                  highlightColor: Color(0XFFD8D8D8),
                  child: Container(
                    decoration: BoxDecoration(
                      color: Color(0XFFD8D8D8),
                      borderRadius: BorderRadius.circular(2),
                    ),
                    width: 64.w,
                    height: 20.h,
                  ),
                ),
              ),
            ],
          ),
          Expanded(
              child: ListView.builder(
            itemCount: 10,
            physics: BouncingScrollPhysics(),
            shrinkWrap: true,
            itemBuilder: (context, position) {
              return GestureDetector(
                onTap: () {},
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Shimmer.fromColors(
                      baseColor: Color(0XFFD8D8D8),
                      highlightColor: Color(0XFFD8D8D8),
                      child: Container(
                        margin: EdgeInsets.symmetric(horizontal: 6.w),
                        decoration: BoxDecoration(
                          color: Color(0XFFD8D8D8),
                          borderRadius: BorderRadius.circular(2),
                        ),
                        height: 174.h,
                      ),
                    ),
                    Padding(
                      padding:
                          EdgeInsets.only(top: 7.h, left: 10.w, bottom: 8.h),
                      child: Shimmer.fromColors(
                        baseColor: Color(0XFFD8D8D8),
                        highlightColor: Color(0XFFD8D8D8),
                        child: Container(
                          decoration: BoxDecoration(
                            color: Color(0XFFD8D8D8),
                            borderRadius: BorderRadius.circular(2),
                          ),
                          width: 106.w,
                          height: 20.h,
                        ),
                      ),
                    ),
                    Padding(
                      padding: EdgeInsets.only(left: 10.w, bottom: 12.h),
                      child: Row(
                        children: [
                          Shimmer.fromColors(
                            baseColor: Color(0XFFD8D8D8),
                            highlightColor: Color(0XFFD8D8D8),
                            child: Container(
                              decoration: BoxDecoration(
                                color: Color(0XFFD8D8D8),
                                borderRadius: BorderRadius.circular(2),
                              ),
                              width: 166.w,
                              height: 20.h,
                            ),
                          ),
                          Spacer(),
                          Shimmer.fromColors(
                            baseColor: Color(0XFFD8D8D8),
                            highlightColor: Color(0XFFD8D8D8),
                            child: Container(
                              margin: EdgeInsets.only(right: 10.w),
                              decoration: BoxDecoration(
                                color: Color(0XFFD8D8D8),
                                borderRadius: BorderRadius.circular(100),
                              ),
                              width: 86.w,
                              height: 25.h,
                            ),
                          ),
                        ],
                      ),
                    ),
                  ],
                ),
              );
            },
          )),
        ],
      ),
    );
  }
}