zhiying_base_widget/lib/pages/launch_page/launch_page.dart

import 'dart:convert';
import 'dart:typed_data';

import 'package:connectivity/connectivity.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:zhiying_base_widget/dialog/tip_dialog/tip_dialog.dart';
import 'package:mobpush_plugin/mobpush_custom_message.dart';
import 'package:mobpush_plugin/mobpush_notify_message.dart';
import 'package:mobpush_plugin/mobpush_plugin.dart';
import 'package:zhiying_base_widget/models/app_config_model.dart';
import 'package:zhiying_base_widget/pages/guide_page/guide_page.dart';
import 'package:zhiying_base_widget/pages/home_page/home_page.dart';
import 'package:zhiying_comm/util/application.dart';
import 'package:zhiying_comm/zhiying_comm.dart';
import 'package:dio/dio.dart';
import 'package:zhiying_base_widget/utils/contants.dart';
import 'package:zhiying_comm/util/shared_prefe_util.dart';
import 'package:package_info/package_info.dart';

// 启动页，页面初始化等操作~跟原生启动页保持一致，防止白屏问题
class LaunchPage extends StatefulWidget {
  final WidgetBuilder builder;

  const LaunchPage({Key key, this.builder}) : super(key: key);

  @override
  _LaunchPageState createState() => _LaunchPageState();
}

class _LaunchPageState extends State<LaunchPage> with TickerProviderStateMixin {
  final GlobalKey navigatorKey = new GlobalKey();

  ///闪屏动画
  AnimationController animationController;

  @override
  void initState() {
    animationController = AnimationController(vsync: this);
    Connectivity().checkConnectivity().then((connectivityResult) async {
      if (connectivityResult == ConnectivityResult.mobile || connectivityResult == ConnectivityResult.wifi) {
        // I am connected to a wifi network.
        Logger.debug('ConnectivityResult.wifi');
        print('ConnectivityResult.wifi');
        Application.init().then((_) async {
          PackageInfo packageInfo = await PackageInfo.fromPlatform();
          String versionNumber = await SharedPreferencesUtil.getStringValue(Constants.versionNumber);
          String currentVersionCode = packageInfo.buildNumber?.toString() ?? '';
          if (versionNumber == null || versionNumber == '' || versionNumber != currentVersionCode) {
            await _showGuideImage();
            SharedPreferencesUtil.setStringValue(Constants.versionNumber, currentVersionCode);
          }

          if (widget.builder != null) {
            Navigator.of(context).pushReplacement(CupertinoPageRoute(builder: widget.builder));
          } else {
            // Navigator.of(context).pushReplacement(
            //     CupertinoPageRoute(builder: (context) => HomePage()));
            Navigator.of(context).pushReplacementNamed('/homePage');
          }
        }).catchError((err) async {
          if (err.toString().contains("BaseSettingModel")) {
            await showDialog(
                context: context,
                child: TipDialog(
                  content: "基本配置加载失败!请检查网络是否可用后再启动应用!",
                ));
            SystemNavigator.pop();
          }
          Logger.error(err);
        });
      } else {
        ///在无网络情况下提示用户打开网络
        await showDialog(
            context: context,
            child: TipDialog(
              content: "无法连接网络!请打开移动网络/连接WIFI后再尝试",
            ));
        Logger.error('未知网络，APP初始化失败');
        print('unknow');
        SystemNavigator.pop();
      }
    });

    super.initState();
  }

  // validateInit()async{
  //   PackageInfo packageInfo = await PackageInfo.fromPlatform();
  //   String versionNumber =
  //   await SharedPreferencesUtil.getStringValue(Constants.versionNumber);
  //   String currentVersionCode =
  //       packageInfo.buildNumber?.toString() ?? '';
  //   if (versionNumber == null || versionNumber == '' || versionNumber != currentVersionCode) {
  //     await _showGuideImage();
  //     SharedPreferencesUtil.setStringValue(Constants.versionNumber, currentVersionCode);
  //   }else{
  //     Navigator.of(context).pushReplacement(
  //                  CupertinoPageRoute(builder: (context) => HomePage()));
  //             Navigator.of(context).pushReplacementNamed('/homePage');
  //   }
  // }

  Future _showGuideImage() async {
    try {
      // 引导页
      AppConfigGuideModel guide = AppConfigModel
          .getConfig()
          ?.guideImage;
      if (guide != null && guide.images.length > 0) {
        Dio dio = Dio();
        print("加载图片");
        List<Uint8List> guideImages = List();
        for (int i = 0; i < guide.images.length; i++) {
          Response response = await dio.get(guide.images[i], options: Options(responseType: ResponseType.bytes));
          if (response.statusCode == 200) {
            Uint8List data = Uint8List.fromList(response.data);
            guideImages.add(data);
          }
        }

        await Navigator.of(context).push(CupertinoPageRoute(builder: (context) => GuidePage(guide, guideImages)));
      }
    }catch(e){
      throw "引导图加载失败";
    }
  }

  @override
  Widget build(BuildContext context) {
    return Stack(
      alignment: Alignment.topCenter,
      children: <Widget>[
        Container(
          color: Colors.white,
            width: double.infinity,
            child: Image.asset(
              'assets/images/launch_image/launch_image.png',
              package: 'zhiying_base_widget',
              fit: BoxFit.cover,
            ),
        ),
      ],
    );
  }
}