如果你想要一个次要的启动画面(在原生画面之后)，这里有一个简单的例子:

class SplashPage extends StatelessWidget {
  SplashPage(BuildContext context) {
    Future.delayed(const Duration(seconds: 3), () {
      // Navigate here to next screen
    });
  }

  @override
  Widget build(BuildContext context) {
    return Text('Splash screen here');
  }
}

这是在Flutter中添加动态启动画面的最佳方法。

主要。飞镖

import 'package:flutter/material.dart';
import 'constant.dart';

void main() => runApp(MaterialApp(
      title: 'GridView Demo',
      home: SplashScreen(),
      theme: ThemeData(
        primarySwatch: Colors.red,
        accentColor: Color(0xFF761322),
      ),
      routes: <String, WidgetBuilder>{
        SPLASH_SCREEN: (BuildContext context) => SplashScreen(),
        HOME_SCREEN: (BuildContext context) => BasicTable(),
        //GRID_ITEM_DETAILS_SCREEN: (BuildContext context) => GridItemDetails(),
      },
    ));

SPLASHSCREEN。飞镖

import 'dart:async';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:app_example/constants.dart';


class SplashScreen extends StatefulWidget {
  @override
  SplashScreenState createState() => new SplashScreenState();
}

class SplashScreenState extends State<SplashScreen>
    with SingleTickerProviderStateMixin {
  var _visible = true;

  AnimationController animationController;
  Animation<double> animation;

  startTime() async {
    var _duration = new Duration(seconds: 3);
    return new Timer(_duration, navigationPage);
  }

  void navigationPage() {
    Navigator.of(context).pushReplacementNamed(HOME_SCREEN);
  }

@override
dispose() {
  animationController.dispose();  
  super.dispose();
}

  @override
  void initState() {
    super.initState();
    animationController = new AnimationController(
      vsync: this,
      duration: new Duration(seconds: 2),
    );
    animation =
        new CurvedAnimation(parent: animationController, curve: Curves.easeOut);

    animation.addListener(() => this.setState(() {}));
    animationController.forward();

    setState(() {
      _visible = !_visible;
    });
    startTime();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Stack(
        fit: StackFit.expand,
        children: <Widget>[
          new Column(
            mainAxisAlignment: MainAxisAlignment.end,
            mainAxisSize: MainAxisSize.min,
            children: <Widget>[
              Padding(
                padding: EdgeInsets.only(bottom: 30.0),
                child: new Image.asset(
                  'assets/images/powered_by.png',
                  height: 25.0,
                  fit: BoxFit.scaleDown,
                ),
              )
            ],
          ),
          new Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              new Image.asset(
                'assets/images/logo.png',
                width: animation.value * 250,
                height: animation.value * 250,
              ),
            ],
          ),
        ],
      ),
    );
  }
}

常量。飞镖

String SPLASH_SCREEN='SPLASH_SCREEN';
String HOME_SCREEN='HOME_SCREEN';

主屏幕。飞镖

import 'package:flutter/material.dart';

class BasicTable extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("Table Widget")),
      body: Center(child: Text("Table Widget")),
    );
  }
}

以下是在IOS和Android平台上为Flutter应用程序配置启动画面的步骤。

IOS平台

所有提交到苹果应用商店的应用程序都必须使用Xcode故事板来提供应用程序的启动屏幕。让我们分三步来做:-

第一步:打开ios/Runner。Xcworkspace从应用程序目录的根目录。

步骤2:选择Runner/Assets。从Project Navigator中拖动所有大小的启动图像(2x, 3x等)。您还可以从https://appicon.co/#image-sets生成不同大小的图像

步骤3:你可以看到启动屏幕。故事板文件显示了所提供的图像，在这里您还可以通过简单地拖动图像来更改图像的位置。有关更多信息，请参阅官方文档https://developer.apple.com/design/human-interface-guidelines/ios/visual-design/launch-screen/

Android平台

在Android中，当你的Android应用程序初始化时，会显示一个启动屏幕。让我们在3个步骤中设置这个启动屏幕:-

第一步:打开android/app/src/main/res/drawable/launch_background.xml文件。

第二步:在第4行，您可以选择所需的颜色:-

<item android:drawable="@android:color/white" />

第三步:在第10行，你可以改变图像:-

android:src="@mipmap/launch_image"

就这样，你完成了!快乐编码:)

@Collin Jackson和@Sniper都是对的。你可以按照以下步骤分别在android和iOS上设置启动映像。然后在你的MyApp()中，在你的initState()中，你可以使用Future.delayed来设置定时器或调用任何api。在Future返回响应之前，你的启动图标将会显示，然后随着响应的到来，你可以在启动画面后移动到你想要去的屏幕。您可以看到此链接:颤振启动画面

让你的材料应用像这样

=>添加依赖

=> import import 'package:splashscreen/splashscreen.dart';

import 'package:flutter/material.dart';
import 'package:splashscreen/splashscreen.dart';
import 'package:tic_tac_toe/HomePage.dart';
void main(){
  runApp(
    MaterialApp(
      darkTheme: ThemeData.dark(),
      debugShowCheckedModeBanner: false,
      home: new MyApp(),
    )
  );
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => new _MyAppState();
}

class _MyAppState extends State<MyApp> {
  @override
  Widget build(BuildContext context) {
    return new SplashScreen(
      seconds: 6,
      navigateAfterSeconds: new HomePage(),
      title: new Text('Welcome',
      style: new TextStyle(
        fontWeight: FontWeight.bold,
        fontSize: 26.0,
        color: Colors.purple,
       ),
      ),
      image: Image.asset("images/pic9.png"),
      backgroundColor: Colors.white,
      photoSize: 150.0,
    );
  }
}

最后的屏幕输出像这样，你可以根据你的要求改变秒 圆将是圆的

添加如下所示的页面和路由可能会有所帮助

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutkart/utils/flutkart.dart';
import 'package:flutkart/utils/my_navigator.dart';

class SplashScreen extends StatefulWidget {
  @override
  _SplashScreenState createState() => _SplashScreenState();
}

class _SplashScreenState extends State<SplashScreen> {
  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    Timer(Duration(seconds: 5), () => MyNavigator.goToIntro(context));
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Stack(
        fit: StackFit.expand,
        children: <Widget>[
          Container(
            decoration: BoxDecoration(color: Colors.redAccent),
          ),
          Column(
            mainAxisAlignment: MainAxisAlignment.start,
            children: <Widget>[
              Expanded(
                flex: 2,
                child: Container(
                  child: Column(
                    mainAxisAlignment: MainAxisAlignment.center,
                    children: <Widget>[
                      CircleAvatar(
                        backgroundColor: Colors.white,
                        radius: 50.0,
                        child: Icon(
                          Icons.shopping_cart,
                          color: Colors.greenAccent,
                          size: 50.0,
                        ),
                      ),
                      Padding(
                        padding: EdgeInsets.only(top: 10.0),
                      ),
                      Text(
                        Flutkart.name,
                        style: TextStyle(
                            color: Colors.white,
                            fontWeight: FontWeight.bold,
                            fontSize: 24.0),
                      )
                    ],
                  ),
                ),
              ),
              Expanded(
                flex: 1,
                child: Column(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: <Widget>[
                    CircularProgressIndicator(),
                    Padding(
                      padding: EdgeInsets.only(top: 20.0),
                    ),
                    Text(
                      Flutkart.store,
                      softWrap: true,
                      textAlign: TextAlign.center,
                      style: TextStyle(
                          fontWeight: FontWeight.bold,
                          fontSize: 18.0,
                          color: Colors.white),
                    )
                  ],
                ),
              )
            ],
          )
        ],
      ),
    );
  }
}

如果你想坚持到底，请参见: https://www.youtube.com/watch?v=FNBuo-7zg2Q