huixiang_app/lib/article/hot_article_item.dart

import 'package:dio/dio.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_easyloading/flutter_easyloading.dart';
import 'package:huixiang/generated/l10n.dart';
import 'package:huixiang/retrofit/data/article.dart';
import 'package:huixiang/retrofit/data/banner.dart';
import 'package:huixiang/retrofit/data/base_data.dart';
import 'package:huixiang/retrofit/data/page.dart';
import 'package:huixiang/retrofit/retrofit_api.dart';
import 'package:huixiang/view_widget/classic_header.dart';
import 'package:huixiang/view_widget/hot_item.dart';
import 'package:huixiang/view_widget/my_appbar.dart';
import 'package:huixiang/view_widget/my_footer.dart';
import 'package:pull_to_refresh/pull_to_refresh.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';

class TouTiao extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _TouTiao();
  }
}

class _TouTiao extends State<TouTiao> {
  ApiService apiService;
  List<BannerData> bannerData = [];

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

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

    SharedPreferences.getInstance().then((value) => {
      apiService =  ApiService(Dio(), context: context, token: value.getString("token")),
      queryArticle(),
    });
  }

  int pageNum = 1;
  RefreshController refreshController = RefreshController();

  _onRefresh() {
    pageNum = 1;
    queryArticle();
  }

  List<Article> articles = [];

  queryArticle() async {
    BaseData<PageInfo<Article>> baseData = await apiService.queryArticle({
      "pageNum": pageNum,
      "pageSize": 10,
      "searchKey": "",
      "state": 1,
      "type": 2
    }).catchError((onError){
      refreshController.refreshFailed();
      refreshController.loadFailed();
    });
    if (baseData != null && baseData.isSuccess) {
      refreshController.refreshCompleted();
      refreshController.loadComplete();
      if(pageNum == 1) {
        articles.clear();
      }
      articles.addAll(baseData.data.list);
      if (baseData.data.pageNum == baseData.data.pages) {
        refreshController.loadNoData();
      } else {
        pageNum += 1;
      }
      setState(() {});
    } else {
      refreshController.refreshFailed();
      refreshController.loadFailed();
    }
  }

  ///banner
  queryCourseBanner() async {
    if (apiService == null) {
      SharedPreferences value = await SharedPreferences.getInstance();
      apiService = ApiService(
        Dio(),
        context: context,
        token: value.getString("token"),
        showLoading: true
      );
    }
    BaseData<PageInfo<BannerData>> baseData =
    await apiService.queryBanner({
      "model": {"type": "COURSE_BANNER"},
    }).catchError((onError) {
      refreshController.refreshFailed();
    });
    if (baseData != null && baseData.isSuccess) {
      bannerData.clear();
      bannerData.addAll(baseData.data.records);
      refreshController.refreshCompleted();
    } else {
      refreshController.refreshFailed();
      // SmartDialog.showToast(baseData.msg, alignment: Alignment.center);
    }
    EasyLoading.dismiss();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      // appBar: MyAppBar(
      //   background: Color(0xFFF7F7F7),
      //   leadingColor: Colors.black,
      //   title: S.of(context).huixiangtoutiao,
      //   titleColor: Colors.black,
      //   titleSize: 18.sp,
      // ),
      body: Container(
        child: Column(
          children: [

            SmartRefresher(
              controller: refreshController,
              enablePullDown: true,
              enablePullUp: true,
              physics: BouncingScrollPhysics(),
              header: MyHeader(),
              footer: CustomFooter(
                builder: (context, mode) {
                  return MyFooter(mode);
                },
              ),
              onRefresh: _onRefresh,
              onLoading: queryArticle,
              child: ListView.builder(
                itemCount: articles.length,
                physics: NeverScrollableScrollPhysics(),
                scrollDirection: Axis.vertical,
                itemBuilder: (context, position) {
                  return AspectRatio(
                    aspectRatio: position == 0 ? 1.38 : 2.56,
                    child: Container(
                      height: position == 0 ? 247.h : 96.h,
                      margin: EdgeInsets.symmetric(vertical:6.h, horizontal: 16.w),
                      child:
                      HotArticleItem(article: articles[position], isHot: position == 0),
                    ),
                  );
                },
              ),
            ),
          ],
        ),
      ),
    );
  }
}