对于Flutter中的toast消息，使用bot_toast库。这个库提供了丰富的功能，支持显示通知、文本、加载、附件等。烤面包

将flutter_just_toast添加到Pubspecs中的依赖项中。yaml文件。

依赖关系:

flutter_just_toast: ^1.0.1

接下来将包导入到你的类中:

import 'package:flutter_just_toast/flutter_just_toast.dart';

用一条消息实现Toast:

Toast.show(message: "Your toast message",
    duration: Delay.SHORT,
    textColor: Colors.black);

用https://pub.dev/packages/toast做吐司。这个库非常容易使用，适用于iOS和Android。

显示Toast的语法:

Toast.show("Toast plugin app", duration: Toast.LENGTH_SHORT, gravity:  Toast.BOTTOM);

Importcupertino_icons: ^0.1.2并编写以下代码:

showToast(BuildContext context, String message) {
  showDialog(
    context: context,
    builder: (BuildContext context) {
      return CupertinoAlertDialog(
        title: Text(
          "Name of App",
        ),
        content: Text(
          message,
        ),
        actions: [
          CupertinoButton(
            child: Text("OK"),
            onPressed: () {
              Navigator.of(context).pop();
            },
          )
        ],
      );
    },
  );
});

更新:Scaffold.of(上下文)。showSnackBar在Flutter 2.0.0中已弃用(稳定)

你可以使用ScaffoldMessenger.of(context)访问父类ScaffoldMessengerState。

然后做一些类似的事情

ScaffoldMessenger.of(context).showSnackBar(SnackBar(
      content: Text("Sending Message"),
    ));

零食条是材料设计的官方“吐司”。看到间小吃店。

下面是一个完整的例子:

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      home: Home(),
    );
  }
}

class Home extends StatelessWidget {
  const Home({
    Key key,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Snack bar'),
      ),
      body: Center(
        child: RaisedButton(
          onPressed: () => _showToast(context),
          child: const Text('Show toast'),
        ),
      ),
    );
  }

  void _showToast(BuildContext context) {
    final scaffold = ScaffoldMessenger.of(context);
    scaffold.showSnackBar(
      SnackBar(
        content: const Text('Added to favorite'),
        action: SnackBarAction(label: 'UNDO', onPressed: scaffold.hideCurrentSnackBar),
      ),
    );
  }
}

用这个:

Fluttertoast.showToast(
    msg: "This is a Toast message",
    toastLength: Toast.LENGTH_SHORT,
    gravity: ToastGravity.CENTER,
    timeInSecForIos: 1
);