app/lib/paegs/root_page/root_page.dart

import 'dart:convert';

import 'package:amap_location/amap_location.dart';
import 'package:amap_location/amap_location_option.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/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/msg_page/msg_page.dart';
import 'package:bbyyy/paegs/root_page/root_page_view.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:bbyyy/my_tools/pop_up_queue.dart';
import 'package:bbyyy/beans/coupon_bean_entity.dart';
class RootPage extends StatefulWidget {
  @override
  _RootPageState createState() => _RootPageState();
}

class _RootPageState extends State<RootPage> {
  PageController pageController = PageController(initialPage: 0);
  DateTime lastPopTime;

  @override
  void initState() {
    super.initState();
    MyCookie().initP();
    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(() {});
    });
    MyData().init(context);
    queryPersonalInformation();
    checkForUpdates(context);
    Future.delayed(Duration(seconds: 1),(){
      checkCouponEvent();
    });
  }

  @override
  void dispose() {
    // TODO: implement dispose
    EventBus().off('ChangePage');
    AMapLocationClient.stopLocation();
    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: Column(
          children: [
            Expanded(
              child: PageView(
                controller: pageController,
                children: [HomePage(), GangPage(), MsgPage(), MinePage()],
                physics: NeverScrollableScrollPhysics(),
              ),
            ),
            RootPageView().bottomNavigationBar(),
          ],
        ),
      ),
    );
  }

  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()-----$value');
        if(value==PermissionStatus.granted){
          await AMapLocationClient.startup(new AMapLocationOption(
              desiredAccuracy: CLLocationAccuracy.kCLLocationAccuracyHundredMeters));
          await AMapLocationClient.getLocation(true)
              .then((value) {
            MyCookie().location = value;
            EventBus().emit('getLocation');
          });
        }
      });
    }else if(locationStatus.isGranted){
      await AMapLocationClient.startup(new AMapLocationOption(
          desiredAccuracy: CLLocationAccuracy.kCLLocationAccuracyHundredMeters));
      await AMapLocationClient.getLocation(true)
          .then((value) {
        MyCookie().location = value;
        EventBus().emit('getLocation');
      });
    }
    if (cameraStatus.isDenied) {
      await Permission.camera.request().then((value) {
        print('Permission.camera.request()-----$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) {});
  }
}