huixiang_app/lib/mine/roll_center_page.dart

import 'package:dio/dio.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:fluttertoast/fluttertoast.dart';
import 'package:huixiang/generated/l10n.dart';
import 'package:huixiang/retrofit/data/base_data.dart';
import 'package:huixiang/retrofit/data/coupon.dart';
import 'package:huixiang/retrofit/data/page.dart';
import 'package:huixiang/retrofit/retrofit_api.dart';
import 'package:huixiang/view_widget/item_title.dart';
import 'package:huixiang/view_widget/new_coupon_widget.dart';
import 'package:pull_to_refresh/pull_to_refresh.dart';
import 'package:shared_preferences/shared_preferences.dart';

class RollCenterPage extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _RollCenterPage();
  }
}

class _RollCenterPage extends State<RollCenterPage> {
  RefreshController _refreshController;

  ApiService apiService;

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

    SharedPreferences.getInstance().then((value) => {
          apiService =  ApiService(Dio(), context: context, token: value.getString('token')),
          queryCoupon(),
        });
    _refreshController = RefreshController(initialRefresh: false);
    
  }

  int pageNum = 1;
  List<Coupon> coupons = [];

  queryCoupon() async {
    BaseData baseData = await apiService.queryCoupon({
      "centre": true,
      "pageNum": pageNum,
      "pageSize": 10,
      "searchKey": "",
      "state": 1
    });
    if(baseData != null && baseData.isSuccess) {
      PageInfo pageInfo = PageInfo.fromJson(baseData.data);
      coupons.clear();
      coupons.addAll(pageInfo.list.map((e) => Coupon.fromJson(e)).toList());
      setState(() {});
    } else {
      Fluttertoast.showToast(msg: baseData.msg);
    }

  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(
          S.of(context).lingquanzhongxin,
          style: TextStyle(
            color: Colors.black,
            fontWeight: FontWeight.bold,
          ),
        ),
        centerTitle: false,
        backgroundColor: Color(0xFFF7F7F7),
        elevation: 0,
        leading: GestureDetector(
          onTap: () {
            Navigator.of(context).pop();
          },
          child: Container(
            alignment: Alignment.centerRight,
            margin: EdgeInsets.only(left: 10),
            padding: EdgeInsets.all(6),
            child: Icon(
              Icons.arrow_back_ios,
              color: Colors.black,
              size: 24,
            ),
          ),
        ),
        titleSpacing: 2,
        leadingWidth: 56,
      ),
      body: Container(
        child: Column(
          children: [
            ItemTitle(
              text: S.of(context).kelingqudeyouhuiquan,
              imgPath: "assets/image/icon_card_coupon.png",
              moreText: S.of(context).chakanwodekaquan,
              onTap: () {
                Navigator.of(context).pushNamed('/router/mine_card');
              },
            ),
            Expanded(child: ListView.builder(
              itemBuilder: (context, position) {
                return GestureDetector(
                  child: NewCouponWidget(coupons[position],(){
                    queryCoupon();
                  },(){
                    setState(() {
                      coupons[position].isEx = !coupons[position].isEx;
                    });
                  }),
                );
              },
              itemCount: coupons != null ? coupons.length : 0,
            ),)
          ],
        ),
      ),
    );
  }
}