flutter-sport/lib/pages/splash_page.dart

import 'dart:io';

import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:sport/pages/login/license.dart';
import 'package:sport/router/navigator_util.dart';
import 'package:sport/router/routes.dart';
import 'package:sport/widgets/appbar.dart';
import 'package:sport/widgets/button_cancel.dart';
import 'package:sport/widgets/button_primary.dart';

class SplashPage extends StatefulWidget {
  @override
  _SplashPageState createState() => _SplashPageState();
}

class _SplashPageState extends State<SplashPage> {
  @override
  void initState() {
    super.initState();
    _loading();
  }

  _loading() async {
    await Future.delayed(Duration(milliseconds: 1500));

    SharedPreferences prefs = await SharedPreferences.getInstance();
    bool? agreement = prefs.getBool("agreement");
    String? token = prefs.getString("token");
    if (agreement != true || token == null) {
      bool result = await showDialog(
          context: context,
          barrierDismissible: false,
          builder: (context) {
            return WillPopScope(
              onWillPop: () async => false, //关键代码
              child: Dialog(
                backgroundColor: Colors.transparent,
                insetPadding: EdgeInsets.zero,
                child: Center(
                  child: Container(
                    width: 300.0,
                    decoration: BoxDecoration(
                      borderRadius: BorderRadius.all(Radius.circular(10.0)),
                      color: Colors.white,
                    ),
                    padding: const EdgeInsets.symmetric(vertical: 25.0, horizontal: 20.0),
                    child: Column(
                      mainAxisSize: MainAxisSize.min,
                      children: <Widget>[
                        // Header
                        Padding(
                          padding: EdgeInsets.only(top: 5.0),
                          child: Text(
                            "用户协议及隐私政策概要",
                            style: titleStyle.copyWith(fontSize: 16.0),
                          ),
                        ),
                        Padding(
                          padding: const EdgeInsets.only(top: 12.0, bottom: 25.0),
                          child: RichText(
                              strutStyle: StrutStyle(height: 1.8,),
                              text: TextSpan(style: Theme.of(context).textTheme.subtitle1!, children: <InlineSpan>[
                                TextSpan(
                                  text: "欢迎使用趣动app！我们将通过",
                                ),
                                TextSpan(text: "《用户协议》", style: Theme.of(context).textTheme.subtitle1!.copyWith( color: const Color(0xffFFC400)), recognizer: TapGestureRecognizer()..onTap = () => NavigatorUtil.go(context, Routes.serviceagreement)),
                                TextSpan(
                                  text: "及",
                                ),
                                TextSpan(text: "《隐私政策》", style: Theme.of(context).textTheme.subtitle1!.copyWith( color: const Color(0xffFFC400)), recognizer: TapGestureRecognizer()..onTap = () => NavigatorUtil.go(context, Routes.privacypolicy)),
                                TextSpan(
                                  text: "帮助您了解本软件所提供的服务以及我们搜集、使用、储存和共享您个人信息的情况，并告知您所享有的相关权力及可能须承担的义务。未经您允许，我们不会主动向任何第三方共享您的个人信息。请您务必在使用本软件前仔细阅读前述法律文件。如您同意的，请点击“同意”后开始使用我们的服务",
                                ),
                              ])),
                        ),
                        PrimaryButton(height: 40.0,callback: (){
                          Navigator.pop(context, true);}, content: "同意"),
                        const SizedBox(height: 16.0,),
                        CancelButton(
                          content: "暂不使用",
                          callback: () {  Navigator.pop(context, false); },
                        ),
                      ],
                    ),
                  ),
                ),
              ),
            );
          });
      if (result != true) {
        exit(0);
        return;
      }
    }
    if (token == null) {
      NavigatorUtil.goLogin(context);
    } else {
      NavigatorUtil.goHomePage(context);
    }
  }

  @override
  Widget build(BuildContext context) {
    return Material(
      child: Center(
        child: Hero(
          tag: "logo",
          child: Image.asset(
            "lib/assets/img/logo_img.png",
          ),
        ),
      ),
    );
  }
}