flutter-sport/lib/pages/home_page.dart

import 'package:amap_location_fluttify/amap_location_fluttify.dart';
import 'package:dartin/dartin.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:sport/application.dart';
import 'package:sport/config_inject.dart';
import 'package:sport/pages/game/index.dart';
import 'package:sport/pages/home/home_info_page.dart';
import 'package:sport/pages/my/my_page.dart';
import 'package:sport/pages/social/new_social_index_page.dart';
import 'package:sport/pages/social/social_index_page.dart';
import 'package:sport/provider/bluetooth.dart';
import 'package:sport/provider/message_model.dart';
import 'package:sport/services/app_lifecycle_state.dart';
import 'package:sport/utils/toast.dart';
import 'package:sport/utils/update_apk.dart';
import 'package:sport/widgets/decoration.dart';
import 'package:sport/widgets/dialog/share_popup.dart';
import 'package:sport/widgets/misc.dart';

import 'game/detail_bottom.dart';

class HomePage extends StatefulWidget {
  @override
  createState() => _HomePageState();
}

class _HomePageState extends LifecycleState<HomePage> with ConfigInject {
  var _pageController = PageController();
  DateTime _lastPressed;

  ValueNotifier<int> _valueNotifierIndex = ValueNotifier(0);
  final Duration _exitDuration = Duration(seconds: 2);

  final List<Widget> _pages = <Widget>[HomeInfoPage(), GamePage(), NewSocialIndexPage(), MyPage()];


  @override
  void initState() {
    super.initState();
//    Provider.of<Bluetooth>(context, listen: false).listen();
    updateApp(context);
    Provider.of<MessageModel>(context, listen: false).init(); // 这就开始轮询了?
  }

  @override
  void didChangeAppLifecycleState(AppLifecycleState state) {
    super.didChangeAppLifecycleState(state);
    print("$state");
    switch (state) {
      case AppLifecycleState.resumed:
        Provider.of<Bluetooth>(context, listen: false).listen();
        break;
      case AppLifecycleState.paused:
        Provider.of<Bluetooth>(context, listen: false).disposeBluetooth();
        break;
      default:
        break;
    }
  }

  @override
  void dispose() {
    _valueNotifierIndex?.dispose();
    _pageController?.dispose();
    super.dispose();
    AmapLocation.instance?.dispose();
  }

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
  }

  @override
  void didUpdateWidget(HomePage oldWidget) {
    super.didUpdateWidget(oldWidget);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.white,
      bottomNavigationBar: SizedBox(
        height: 49,
        child: Container(
          decoration: shadowTop(),
          padding: const EdgeInsets.only(top: 4),
          child: ValueListenableBuilder(
            valueListenable: _valueNotifierIndex,
            builder: (BuildContext context, int value, Widget child) => CupertinoTabBar(
              backgroundColor: Colors.white,
              border: null,
              iconSize: 22.0,
              activeColor: Color(0xff333333),
              inactiveColor: Color(0xff999999),
              items: <BottomNavigationBarItem>[
                BottomNavigationBarItem(
                  icon: Image.asset("lib/assets/img/tab_home_${value == 0 ? "press" : "normal"}.png"),
                  title: Text(
                    "首页",
                    style: TextStyle(fontSize: 11.0),
                  ),
                ),
                BottomNavigationBarItem(
                  icon: Image.asset("lib/assets/img/tab_game_${value == 1 ? "press" : "normal"}.png"),
                  title: Text("运动", style: TextStyle(fontSize: 11.0)),
                ),
                BottomNavigationBarItem(
                  icon: Image.asset("lib/assets/img/tab_bbs_${value == 2 ? "press" : "normal"}.png"),
                  title: Text("社区", style: TextStyle(fontSize: 11.0)),
                ),
                BottomNavigationBarItem(
                  icon: Image.asset("lib/assets/img/tab_mine_${value == 3 ? "press" : "normal"}.png"),
                  title: Text("我的", style: TextStyle(fontSize: 11.0)),
                ),
              ],
              currentIndex: value,
              onTap: (index) {
                _pageController.jumpToPage(index);
                _valueNotifierIndex.value = index;
                // 这里得轮询解决
//
              },
            ),
          ),
        ),
      ),
      body: WillPopScope(
        onWillPop: () async {
          if (_lastPressed == null || DateTime.now().difference(_lastPressed) > _exitDuration) {
            //两次点击间隔超过2秒则重新计时
            _lastPressed = DateTime.now();
            ToastUtil.show("再次点击返回键退出");
            return false;
          }
          return true;
        },
        child: PageView.builder(
          itemBuilder: (ctx, index) => _pages[index],
          itemCount: _pages.length,
          controller: _pageController,
          physics: NeverScrollableScrollPhysics(),
          onPageChanged: (index) {
            Application.currentPage = index;
          },
        ),
      ),
    );
  }
}