app/lib/paegs/welcome_page/welcome_page.dart

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

import 'package:bbyyy/beans/login_information_bean_entity.dart';
import 'package:bbyyy/https/MyDio.dart';
import 'package:bbyyy/https/my_request.dart';
import 'package:bbyyy/my_tools/easy_loading/easy_loading.dart';
import 'package:bbyyy/my_tools/my_cookie.dart';
import 'package:bbyyy/my_tools/my_tools.dart';
import 'package:bbyyy/paegs/login_page/login_page.dart';
import 'package:bbyyy/paegs/root_page/root_page.dart';
import 'package:flutter/material.dart';

class WelcomePage extends StatefulWidget {
  @override
  _WelcomePageState createState() => _WelcomePageState();
}

class _WelcomePageState extends State<WelcomePage> {
  @override
  void initState() {
    super.initState();
    EasyLoading.instance
      ..displayDuration = const Duration(milliseconds: 1500)
      ..indicatorType = EasyLoadingIndicatorType.ring
      ..loadingStyle = EasyLoadingStyle.light
      ..maskType = EasyLoadingMaskType.black
      ..indicatorSize = 45.0
      ..radius = 10.0
      ..textPadding = EdgeInsets.all(0)
      ..contentPadding = EdgeInsets.fromLTRB(20, 12, 20, 12)
      ..userInteractions = false;
    Timer(Duration(seconds: 1), () {
      if (MyCookie().getLoginInformation() == null ||
          MyCookie().getLoginInformation().data == null ||
          MyCookie().getLoginInformation().data.token.isEmpty ||
          MyCookie().getLoginInformation().data.token == '') {
        MyTools().toPage(context, LoginPage(), (then) {}, noBack: true);
      } else {
        MyDio().initDio();
        checkLogin((r, hE) {
          if (!hE) {
            String token = MyCookie().getToken();
            LoginInformationBeanEntity loginInformation =
            LoginInformationBeanEntity()
                .fromJson(json.decode(r.data.toString()));
            loginInformation.data.token = token;
            MyCookie().saveLoginInformationBeanEntity(loginInformation);
            MyTools().toPage(context, RootPage(), (then) {}, noBack: true);
          } else {
            MyTools().toPage(context, LoginPage(), (then) {}, noBack: true);
          }
        }, (e) {});
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Stack(
        children: [
          Image.asset(
            'images/we_bg.png',
            fit: BoxFit.cover,
            height: MediaQuery.of(context).size.height,
            width: MediaQuery.of(context).size.width,
          ),
          Image.asset(
            'images/we_logo.png',
            height: 118,
            width: 118,
          )
        ],
        alignment: Alignment.center,
      ),
    );
  }
}