huixiang_app/lib/home/main_home_page.dart

import 'package:flutter/material.dart';
import 'package:huixiang/generated/l10n.dart';
import 'package:huixiang/home/activity_list_page.dart';
import 'package:huixiang/home/home_page.dart';
import 'package:huixiang/home/points_mall_page.dart';
import 'package:huixiang/main.dart';
import 'package:huixiang/utils/event_type.dart';
import 'package:huixiang/view_widget/my_appbar.dart';
import 'package:huixiang/view_widget/my_tab.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';

class MainHomePage extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _MainHomePage();
  }
}

class _MainHomePage extends State<MainHomePage>
    with SingleTickerProviderStateMixin, AutomaticKeepAliveClientMixin {
  TabController tabcontroller;
  List<Widget> _widgetOptions;

  @override
  void initState() {
    super.initState();
    if (tabcontroller == null)
      tabcontroller = TabController(length: 3, vsync: this);
    tabcontroller.addListener(() => () {});

    //NoDataView(),
    _widgetOptions = <Widget>[
      HomePage(() {
        setState(() {
          tabcontroller.index = 2;
        });
      }),
      ActivityListPage(),
      PointsMallPage()
    ];

    eventBus.on<EventType>().listen((event) {
      print("object: MainHomePage");
      if (event.type < 3) {
        setState(() {});
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    super.build(context);
    return DefaultTabController(
        length: 3,
        child: Scaffold(
          appBar: MyAppBar(
            background: Color(0xFFFAFAFA),
            toolbarHeight: 50.h,
            leading: false,
            action: Container(
              margin: EdgeInsets.only(right: 17.w),
              child: GestureDetector(
                onTap: () {
                  // Navigator.of(context).pushNamed("/router/msg_page");
                  Navigator.of(context).pushNamed('/router/system_msg_page');
                },
                child: Image.asset(
                  "assets/image/icon_notices.png",
                  width: 24,
                  height: 24,
                ),
              ),
            ),
            titleChild: PreferredSize(
              preferredSize: Size(double.infinity, 38.h),
              child: TabBar(
                controller: tabcontroller,
                automaticIndicatorColorAdjustment: true,
                isScrollable: true,
                indicatorWeight: 2,
                indicatorColor: Color(0xFF39B54A),
                labelPadding: EdgeInsets.only(left: 8.w, right: 8.w),
                indicatorSize: TabBarIndicatorSize.label,
                unselectedLabelStyle: TextStyle(
                  fontSize: 15.sp,
                  fontWeight: FontWeight.w400,
                ),
                labelStyle: TextStyle(
                  color: Colors.black,
                  fontSize: 18.sp,
                  fontWeight: FontWeight.bold,
                ),
                labelColor: Colors.black,
                tabs: [
                  MyTab(text: S.of(context).shouye),
                  MyTab(
                    text: S.of(context).huodongliebiao,
                  ),
                  MyTab(
                    text: S.of(context).jifenshangcheng,
                  ),
                ],
              ),
            ),
          ),
          body: Container(
            padding: EdgeInsets.only(bottom: 76.h),
            child: TabBarView(
              physics: BouncingScrollPhysics(),
              children: _widgetOptions,
              controller: tabcontroller,
            ),
          ),
        ));
  }

  @override
  bool get wantKeepAlive => true;
}