lift-app/lib/internal/news/page/news_home_page.dart

import 'dart:async';

import 'package:amap_location_flutter_plugin/amap_location_flutter_plugin.dart';
import 'package:amap_location_flutter_plugin/amap_location_option.dart';
import 'package:flutter/material.dart';
import 'package:liftmanager/common/common.dart';
import 'package:liftmanager/internal/news/news_router.dart';
import 'package:liftmanager/internal/news/model/news_comm_entity.dart';
import 'package:liftmanager/internal/news/presenter/news_home_presenter.dart';
import 'package:liftmanager/internal/search/presenter/base_list_provider.dart';
import 'package:liftmanager/internal/work/model/banner_entity.dart';
import 'package:liftmanager/internal/work/work_router.dart';
import 'package:liftmanager/mvp/base_page_state.dart';
import 'package:liftmanager/net/api_service.dart';
import 'package:liftmanager/res/resources.dart';
import 'package:liftmanager/routers/fluro_navigator.dart';
import 'package:liftmanager/utils/theme_utils.dart';
import 'package:liftmanager/utils/toast.dart';
import 'package:liftmanager/widgets/app_city_search_bar.dart';
import 'package:liftmanager/widgets/load_image.dart';
import 'package:liftmanager/widgets/my_refresh_list.dart';
import 'package:liftmanager/widgets/state_layout.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:provider/provider.dart' as p;
import 'package:flustars/flustars.dart' as FlutterStars;

class NewsPage extends StatefulWidget {
  @override
  NewsPageState createState() => NewsPageState();
}

const timeout = const Duration(seconds: 5);

class NewsPageState extends BasePageState<NewsPage, NewsHomePresenter>
    with TickerProviderStateMixin, AutomaticKeepAliveClientMixin{

  Map<String, Object> _locationResult;
  StreamSubscription<Map<String, Object>> _locationListener;
  AmapLocationFlutterPlugin _locationPlugin = new AmapLocationFlutterPlugin();


  BaseListProvider<NewsItem> provider = BaseListProvider<NewsItem>();
  TabController _tabController;
  PageController _pageController = PageController();
  int _index = 0;
  Timer _timer;
  int _page = 1;
  List<BannerEntity> bannerList = [];
  List<String> menuTitle = ["互动问答", "电梯保险", "知识学堂"];
  List<String> menuImage = ["icon_tdgl", "icon_tdmp", "icon_tdmp"];
  List<String> menuDesc = ["1548人发起最新求助", "最高赔付200万", "海量知识任你学"];
  String cityName = "";

  @override
  void initState() {
    print("initState");
    _locationListener = _locationPlugin
        .onLocationChanged()
        .listen((Map<String, Object> result) {
      setState(() {
        _locationPlugin.stopLocation();
        _locationResult = result;
//        address latitude longitude
        _locationResult.forEach((key, value) {
          if(key == 'city'){
            cityName = '$value';
            setState(() {

            });
          }
          print(111);
          print('key:$key :');
          print('value:$value :');
        });
      });
    });

    /// 默认为加载中状态，本页面场景默认为空
    provider.setStateTypeNotNotify(StateType.loading);
    _tabController = TabController(length: 0, vsync: this);
    _timer = Timer.periodic(timeout, _handleTimeout);

    super.initState();
//    cityName = SpUtil.getString("cityName");
    _onRefresh();
    getBanner();
    getUserInfo();
    getLocation();
  }

  void _setLocationOption() {
    if (null != _locationPlugin) {
      AMapLocationOption locationOption = new AMapLocationOption();

      ///是否单次定位
      locationOption.onceLocation = true;
      ///是否需要返回逆地理信息
      locationOption.needAddress = true;
      ///逆地理信息的语言类型
      locationOption.geoLanguage = GeoLanguage.DEFAULT;

      ///设置Android端连续定位的定位间隔
      locationOption.locationInterval = 20000;
      ///设置Android端的定位模式<br>
      ///可选值：<br>
      ///<li>[AMapLocationMode.Battery_Saving]</li>
      ///<li>[AMapLocationMode.Device_Sensors]</li>
      ///<li>[AMapLocationMode.Hight_Accuracy]</li>
      locationOption.locationMode = AMapLocationMode.Hight_Accuracy;

      ///设置iOS端的定位最小更新距离<br>
      locationOption.distanceFilter = -1;
      ///设置iOS端期望的定位精度
      /// 可选值：<br>
      /// <li>[DesiredAccuracy.Best] 最高精度</li>
      /// <li>[DesiredAccuracy.BestForNavigation] 适用于导航场景的高精度 </li>
      /// <li>[DesiredAccuracy.NearestTenMeters] 10米 </li>
      /// <li>[DesiredAccuracy.Kilometer] 1000米</li>
      /// <li>[DesiredAccuracy.ThreeKilometers] 3000米</li>
      locationOption.desiredAccuracy = DesiredAccuracy.NearestTenMeters;
      ///设置iOS端是否允许系统暂停定位
      locationOption.pausesLocationUpdatesAutomatically = false;

      ///将定位参数设置给定位插件
      _locationPlugin.setLocationOption(locationOption);
    }
  }

  ///获取定位权限
  Future<bool> requestPermission() async {
    final permissions = await PermissionHandler()
        .requestPermissions([PermissionGroup.location]);
    if (permissions[PermissionGroup.location] == PermissionStatus.granted) {
      return true;
    } else {
      toasts('需要定位权限!');
      return false;
    }
  }

  ///获取用户信息
  void getUserInfo() {
    ApiService(context: context).userInfo(
        onSuccess: (data) {
          if (!mounted) {
            return;
          }
          if(data != null){
            FlutterStars.SpUtil.putString(Constant.companyRole,data.roleCode);
          }
        },
        onError: (code, msg) {

        });
  }

  ///获取位置信息
  getLocation() async {
    if (await requestPermission()) {
      if (null != _locationPlugin) {
        ///开始定位之前设置定位参数
        _setLocationOption();
        _locationPlugin.startLocation();
      }
    }
  }

  void getBanner() {
    ApiService(context: context).getBanner(
        onSuccess: (data) {
          bannerList = data;
          if (bannerList.length > 0) {
            _pageController.jumpToPage(0);
            _tabController =
                TabController(length: bannerList.length, vsync: this);
            setState(() {});
          }
        },
        onError: (code, msg) {
          showToast(msg);
        });
  }

  _handleTimeout(Timer timer) {
    _index++;
    _pageController.animateToPage(
      _index % (bannerList.length == 0 ? 1 : bannerList.length),
      duration: Duration(milliseconds: 16),
      curve: Curves.fastOutSlowIn,
    );
  }

  void _onPageChanged(int index) {
    _index = index;
    _tabController.animateTo(index);
  }

  @override
  void dispose() {
    _tabController?.dispose();
    _timer.cancel();
    _pageController.dispose();
    ///移除定位监听
    if (null != _locationListener) {
      _locationListener.cancel();
    }

    ///销毁定位
    if (null != _locationPlugin) {
      _locationPlugin.destroy();
    }
    super.dispose();

  }

  @override
  Widget build(BuildContext context) {
    bool isDark = ThemeUtils.isDark(context);
    return p.ChangeNotifierProvider<BaseListProvider<NewsItem>>(
        create: (_) => provider,
        child: Scaffold(
          appBar: AppCitySearchAppBar(
            city: "$cityName",
          ),
          body: Container(
            color: ThemeUtils.getBackgroundColor(context),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: <Widget>[
                Offstage(
                  offstage: bannerList.length == 0,
                  child: bannerWidget(),
                ),
//                Container(
////                  color: Colors.white,
////                  child: _ToolsItem(menuTitle, menuImage, menuDesc, (index) {
////                    if (index == 0) {
//////                    NavigatorUtils.push(context, AccountRouter.certificatePage);
////                    } else if (index == 1) {
//////                    NavigatorUtils.push(context, TeamRouter.teamUserPage);
////                    }
////                  }),
////                ),
                Gaps.vGap10,
                Container(
                  height: 45,
                  padding: EdgeInsets.only(left: 15, right: 15),
                  alignment: Alignment.centerLeft,
                  decoration: BoxDecoration(
                    color: isDark?Colours.dark_bg_color:Colors.white,
                    border: Border(
                      bottom: BorderSide(width: 0.5, color: Colours.line),
                    ),
                  ),
                  child: Row(
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    children: <Widget>[
                      Container(
                        padding: EdgeInsets.only(left: 10),
                        decoration: BoxDecoration(
                            border: Border(
                          left: BorderSide(width: 3, color: Colours.app_main),
                        )),
                        child: Text(
                          "热门新闻",
                          style: TextStyles.textBold15,
                        ),
                      ),
                      GestureDetector(
                          onTap: () {
                            NavigatorUtils.push(
                                context, NewsRouter.newsTopList);
                          },
                          child: Text(
                            "更多",
                            style: TextStyle(
                                fontSize: 13, color: Color(0xFF666666)),
                          )),
                    ],
                  ),
                ),
                Expanded(
                    flex: 1,
                    child: p.Consumer<BaseListProvider<NewsItem>>(
                        builder: (_, provider, __) {
                      return MyListView(
                        itemCount: provider.list.length,
                        stateType: provider.stateType,
                        onRefresh: _onRefresh,
                        loadMore: _loadMore,
//                    itemExtent: 67.0,
                        hasMore: provider.hasMore,
                        itemBuilder: (_, index) {
                          var item = provider.list[index];
                          return InkWell(
                            onTap: () {
                              NavigatorUtils.push(context,
                                  "${NewsRouter.newsDetail}?id=${item.id}");
                            },
                            child: Container(
                              decoration: BoxDecoration(
                                color: isDark?Colours.dark_bg_color:Colors.white,
                                border: Border(
                                    bottom: BorderSide(
                                        width: 0.5, color: Colours.line)),
                              ),
                              padding: const EdgeInsets.all(15),
                              child: Column(
                                crossAxisAlignment: CrossAxisAlignment.start,
                                mainAxisAlignment: MainAxisAlignment.start,
                                children: <Widget>[
                                  Text(
                                    "${item.title}",
                                    style: TextStyle(fontSize: 15,color: isDark?Colours.dark_text:Colours.text),
//                                        overflow: TextOverflow.ellipsis,
                                  ),
                                  Gaps.vGap12,
                                  Text(
                                    "${item.releaseUser}·阅读${item.lookNum}次·点赞${item.likeNum}",
                                    style: TextStyle(
                                        fontSize: 11, color: Colours.text_gray),
                                  )
                                ],
                              ),
                            ),
                          );
                        },
                      );
                    }))
              ],
            ),
          ),
        ));
  }

  Widget bannerWidget() {
    return Container(
        height: 160,
        child: Stack(
          children: <Widget>[
            PageView(
              children: bannerList.map((item) {
                return GestureDetector(
                  onTap: (){
                    if(item.url.length>0){
                      NavigatorUtils.push(context, "${WorkRouter.webview}?title="+Uri.encodeComponent("详情")+"&url="+Uri.encodeComponent(item.url));
                    }
                  },
                  child: Image.network(
                    item.image,
                    fit: BoxFit.fill, //使照片占满整个屏幕
                  ),
                );
              }).toList(),
              onPageChanged: _onPageChanged,
              controller: _pageController,
            ),
            Align(
              alignment: Alignment(0.0, 0.9),
              child: TabPageSelector(
                color: Colors.white,
                selectedColor: Colours.app_main,
                controller: _tabController,
              ),
            ),
          ],
        ));
  }

  Widget lineTxt(title, value) {
    return Container(
      padding: EdgeInsets.only(left: 12, top: 5, right: 12),
      child: Row(
        children: <Widget>[
          Text("${title}",
              style: TextStyle(fontSize: 13, color: Colours.dark_text_gray)),
          Expanded(
            flex: 1,
            child: Text(
              "${value}",
              textAlign: TextAlign.right,
              style: TextStyle(fontSize: 13, color: Colours.dark_text_gray),
            ),
          )
        ],
      ),
    );
  }

  Future _onRefresh() async {
    _page = 1;
    await presenter.newsList(context, _page, 1, "", cityName);
  }

  Future _loadMore() async {
    _page++;
    await presenter.newsList(context, _page, 1, "", cityName);
  }

  @override
  NewsHomePresenter createPresenter() {
    return NewsHomePresenter();
  }

  @override
  bool get wantKeepAlive => true;
}

class _ToolsItem extends StatelessWidget {
  _ToolsItem(this.titles, this.imgs, this.desc, this.onTap, {Key key})
      : super(key: key);

  List<String> titles;
  List<String> imgs;
  List<String> desc;
  Function onTap;

  @override
  Widget build(BuildContext context) {
    return GridView.builder(
      shrinkWrap: true,
      padding: const EdgeInsets.fromLTRB(8.0, 0, 8.0, 0),
      physics: NeverScrollableScrollPhysics(),
      gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
          crossAxisCount: 3, childAspectRatio: 0.9, crossAxisSpacing: 2),
      itemCount: titles.length,
      itemBuilder: (_, index) {
        return InkWell(
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                LoadAssetImage(
                  "work/${imgs[index]}",
                  width: 45.0,
                  height: 45,
                ),
                Gaps.vGap10,
                Text(
                  titles[index],
                  style: TextStyles.textSize14,
                ),
                Gaps.vGap10,
                Text(
                  desc[index],
                  style: TextStyles.textGray10,
                )
              ],
            ),
            onTap: () {
              onTap(index);
            });
      },
    );
  }
}