app/lib/paegs/root_page/root_page.dart

import 'dart:async';
import 'dart:convert';
import 'dart:io';

import 'package:amap_flutter_location/amap_flutter_location.dart';
import 'package:amap_flutter_location/amap_location_option.dart';
import 'package:bbyyy/beans/coupon_bean_entity.dart';
import 'package:bbyyy/beans/user_bean_entity.dart';
import 'package:bbyyy/https/MyDio.dart';
import 'package:bbyyy/https/my_request.dart';
import 'package:bbyyy/my_tools/dims.dart';
import 'package:bbyyy/my_tools/easy_loading/easy_loading.dart';
import 'package:bbyyy/my_tools/event_bus.dart';
import 'package:bbyyy/my_tools/my_cookie.dart';
import 'package:bbyyy/my_tools/my_datas.dart';
import 'package:bbyyy/my_tools/my_tools.dart';
import 'package:bbyyy/my_tools/pop_up_queue.dart';
import 'package:bbyyy/nsq/nsq.dart' as Nsq;
import 'package:bbyyy/paegs/gang_page/gang_page.dart';
import 'package:bbyyy/paegs/home_page/home_page.dart';
import 'package:bbyyy/paegs/mine_page/mine_page.dart';
import 'package:bbyyy/paegs/mine_page/order_page/order_page.dart';
import 'package:bbyyy/paegs/msg_page/msg_page.dart';
import 'package:bbyyy/paegs/root_page/root_page_view.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'package:permission_handler/permission_handler.dart';

class RootPage extends StatefulWidget {
  @override
  _RootPageState createState() => _RootPageState();
}

class _RootPageState extends State<RootPage> {
  PageController pageController = PageController(initialPage: 0);
  DateTime lastPopTime;
  AMapFlutterLocation _locationPlugin = new AMapFlutterLocation();
  Map<String, Object> _locationResult;

  StreamSubscription<Map<String, Object>> _locationListener;

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

    if (Platform.isIOS) {
      requestAccuracyAuthorization();
    }
    _locationListener = _locationPlugin.onLocationChanged().listen((Map<String, Object> result) {
      result.forEach((key, value) {
        print('$key---------------$value');
      });
      setState(() {
        _locationResult = result;
      });
    });
    getLocation();
    Nsq.ConnectServer(
      Nsq.handlerMessage, // 接收消息处理逻辑
      // serverIp: '172.16.104.14',
      serverIp: MyCookie().server,
      // 服务端返回
      serverPort: 4150,
      // 服务端返回
      topic: '${MyCookie().getUID()}',
      // 主题订阅，服务端返回
      channel: '${MyCookie().getUID()}',
      // 服务端返回uid
      clientId: '客户uid',
      // 服务端返回uid
      hostname: '主机名', // 服务端返回
    );
    EventBus().emit('检查粘贴板');
    EventBus().on('ChangePage', (arg) {
      if (RootPageView().bNIndex == 3) {
        queryPersonalInformation();
      }
      pageController.jumpToPage(RootPageView().bNIndex);
      setState(() {});
    });
    EventBus().on('hasNoPay', (arg) {
      setState(() {});
    });
    MyData().init(context);
    queryPersonalInformation();
    checkForUpdates(context);
    Future.delayed(Duration(seconds: 1), () {
      checkCouponEvent();
    });
  }

  @override
  void dispose() {
    // TODO: implement dispose
    EventBus().off('ChangePage');
    EventBus().off('hasNoPay');
    ///移除定位监听
    if (null != _locationListener) {
      _locationListener?.cancel();
    }

    ///销毁定位
    _locationPlugin.destroy();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return WillPopScope(
      onWillPop: () async {
        if (lastPopTime == null ||
            DateTime.now().difference(lastPopTime) > Duration(seconds: 2)) {
          lastPopTime = DateTime.now();
          EasyLoading.showToast('再按一次退出');
        } else {
          lastPopTime = DateTime.now();
          await SystemChannels.platform.invokeMethod('SystemNavigator.pop');
        }
        return false;
      },
      child: Scaffold(
        resizeToAvoidBottomInset: false,
        backgroundColor: Colors.transparent,
        body: Stack(
          children: [
            Column(
              children: [
                Expanded(
                  child: PageView(
                    controller: pageController,
                    children: [HomePage(), GangPage(), MsgPage(), MinePage()],
                    physics: NeverScrollableScrollPhysics(),
                  ),
                ),
                RootPageView().bottomNavigationBar(),
              ],
            ),
            if (MyCookie().haveNoPay)
              Positioned(
                bottom: 60,
                right: 0,
                child: SafeArea(
                  top: false,
                  child: GestureDetector(
                    onTap: () {
                      MyTools().toPage(
                          context,
                          OrderPage(
                            index: 2,
                          ), (then) {
                        queryPersonalInformation();
                      });
                    },
                    behavior: HitTestBehavior.translucent,
                    child: Container(
                      height: 44,
                      width: 100,
                      padding: EdgeInsets.symmetric(horizontal: 10),
                      child: Row(
                        children: [
                          SvgPicture.asset(
                            'images/svg/订单.svg',
                            color: Colors.white,
                            height: 15,
                            width: 15,
                          ),
                          Text(
                            '未付订单',
                            style: TextStyle(color: Colors.white, fontSize: 14),
                          )
                        ],
                        mainAxisAlignment: MainAxisAlignment.spaceBetween,
                      ),
                      decoration: BoxDecoration(
                        color: Colors.amber,
                        borderRadius: BorderRadius.only(
                          topLeft: Radius.circular(22),
                          bottomLeft: Radius.circular(22),
                        ),
                      ),
                    ),
                  ),
                ),
              ),
          ],
        ),
      ),
    );
  }

  void queryPersonalInformation() {
    MyDio().query({
      "key": "user",
      "filters": {
        "conditions": ["uid == ${MyCookie().getUID()}"]
      },
      "dims": userDims,
      "paging": [1, 20]
    }, (response, hasError) {
      if (!hasError) {
        UserBeanEntity entity =
            UserBeanEntity().fromJson(json.decode(response.data.toString()));
        MyCookie().userBean = entity.data.data[0];
        EventBus().emit('userChange');
      }
    }, (error) {});
  }

  Future<void> getLocation() async {
    var locationStatus = await Permission.location.status;
    var cameraStatus = await Permission.camera.status;
    print('Permission.location.status--------------$locationStatus');
    print('Permission.camera.status--------------$cameraStatus');
    if (locationStatus.isDenied) {
      await Permission.location.request().then((value) async {
        print('Permission.location.request()-----$value');
        if (value == PermissionStatus.granted) {
          _setLocationOption();
          _locationPlugin.startLocation();
        }
      });
    } else if (locationStatus.isGranted) {
      _setLocationOption();
      _locationPlugin.startLocation();
    }
    if (cameraStatus.isDenied) {
      await Permission.camera.request().then((value) {
        print('Permission.camera.request()-----$value');
      });
    }
  }

  //查询优惠券活动
  checkCouponEvent() {
    MyDio().query({
      "key": "coupon_distribute",
      "filters": {
        "conditions": ["valid==true"],
      },
      "dims": couponDistributeDims,
      "paging": [1, 100]
    }, (response, hasError) {
      if (!hasError) {
        CouponBeanEntity entity =
            CouponBeanEntity().fromJson(json.decode(response.data.toString()));
        PopUpQueue().coupon.addAll(entity.data.data);
      }
    }, (error) {});
  }

  void requestAccuracyAuthorization() async {
    AMapAccuracyAuthorization currentAccuracyAuthorization = await _locationPlugin.getSystemAccuracyAuthorization();
    if (currentAccuracyAuthorization == AMapAccuracyAuthorization.AMapAccuracyAuthorizationFullAccuracy) {
      print("精确定位类型");
    } else if (currentAccuracyAuthorization == AMapAccuracyAuthorization.AMapAccuracyAuthorizationReducedAccuracy) {
      print("模糊定位类型");
    } else {
      print("未知定位类型");
    }
  }

  void _setLocationOption() {
    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;

    locationOption.desiredLocationAccuracyAuthorizationMode = AMapLocationAccuracyAuthorizationMode.ReduceAccuracy;

    locationOption.fullAccuracyPurposeKey = "AMapLocationScene";

    ///设置Android端连续定位的定位间隔
    locationOption.locationInterval = 2000;

    ///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.Best;

    ///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);
  }
}