huixiang_app/lib/mine/mine_card_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/coupon_widget.dart';
import 'package:huixiang/view_widget/item_title.dart';
import 'package:huixiang/view_widget/my_tab.dart';
import 'package:pull_to_refresh/pull_to_refresh.dart';
import 'package:shared_preferences/shared_preferences.dart';

class MineCardPage extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _MineCardPage();
  }
}

class _MineCardPage extends State<MineCardPage> {
  RefreshController _refreshController;

  ApiService apiService;

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

    SharedPreferences.getInstance().then((value) => {
          apiService = ApiService(Dio(), token: value.getString('token')),
          queryCard(),
        });

    _refreshController = RefreshController(initialRefresh: false);
  }

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

  queryCard() async {
    BaseData baseData = await apiService.queryCard(
        {"centre": true, "pageNum": pageNum, "pageSize": 10, "searchKey": "", "state": 1});
    if (baseData.isSuccess) {
      PageInfo pageInfo = PageInfo.fromJson(baseData.data);
      if(pageNum == 1) {
        coupons.clear();
      }
      coupons.addAll(pageInfo.list.map((e) => Coupon.fromJson(e)));
      setState(() {
        _refreshController.refreshCompleted();
        _refreshController.loadComplete();
        if (pageInfo.pageNum == pageInfo.pages) {
          _refreshController.loadNoData();
        } else {
          pageNum += 1;
        }
      });
    } else {
      _refreshController.loadFailed();
      _refreshController.refreshFailed();
      Fluttertoast.showToast(msg: baseData.msg);
    }
  }

  void _onRefresh() async {
    pageNum = 1;
    queryCard();
  }

  @override
  Widget build(BuildContext context) {
    return DefaultTabController(
      length: 3,
      child: Scaffold(
        appBar: AppBar(
          title: Text(
            "卡包",
            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).keyongyouhuiquan,
                imgPath: "assets/image/icon_card_coupon.png",
                moreText: S.of(context).chakanshixiaoquan,
                onTap: () {
                  Navigator.of(context).pushNamed('/router/mine_card_invalid');
                },
              ),
              Expanded(
                flex: 1,
                child: Container(
                  child: SmartRefresher(
                    enablePullDown: true,
                    enablePullUp: true,
                    header: ClassicHeader(),
                    footer: CustomFooter(
                      builder: (context, mode) {
                        Widget body;
                        if (mode == LoadStatus.idle) {
                          body = Text("pull up load");
                        } else if (mode == LoadStatus.loading) {
                          body = CupertinoActivityIndicator();
                        } else if (mode == LoadStatus.failed) {
                          body = Text("Load Failed!Click retry!");
                        } else if (mode == LoadStatus.canLoading) {
                          body = Text("release to load more");
                        } else {
                          body = Text(S.of(context).meiyougengduoyouhuiquan);
                        }
                        return Container(
                          height: 55.0,
                          child: Center(child: body),
                        );
                      },
                    ),
                    controller: _refreshController,
                    onRefresh: _onRefresh,
                    onLoading: queryCard,
                    child: ListView.builder(
                      itemBuilder: (context, position) {
                        return CouponWidget(coupons[position],() {

                        },);
                      },
                      itemCount: coupons.length,
                    ),
                  ),
                ),
              )
            ],
          ),
        ),
      ),
    );
  }
}