你可以很容易地实现这种效果使用叠加。

代码:

OverlayEntry entry = OverlayEntry(builder: (context) {
              return Positioned(
                  top: MediaQuery.of(context).size.height * 0.8,
                  child: Container(
                    width: MediaQuery.of(context).size.width,
                    alignment: Alignment.center,
                    child: const Card(
                      color: Colors.redAccent,
                      child: Padding(
                        padding: EdgeInsets.all(8),
                        child: Text("This is a message."),
                      ),
                    ),
                  ));
            });

            //show overlay
            Overlay.of(context)!.insert(entry);
            //auto remove this overlay after 3 seconds
            Future.delayed(const Duration(seconds: 3)).then((value) => entry.remove());

截图:

你可以用这个包装:吐司

将这一行添加到依赖项中

toast: ^0.1.5

然后这样使用它:

import 'package:toast/toast.dart';
Toast.show("Toast plugin app", context, duration: Toast.LENGTH_SHORT, gravity:  Toast.BOTTOM);

我想提供一个替代解决方案，以使用包刷新条。

正如包中所说:如果在通知用户时需要更多自定义，请使用此包。对于Android开发人员来说，它可以替代吐司和零食条。

使用flushbar的另一个建议是如何在Flutter的navigator.pop(context)之后显示小吃条?

你也可以设置flushbarPosition为TOP或BOTTOM:

    Flushbar(
      title: "Hey Ninja",
      message: "Lorem Ipsum is simply dummy text of the printing and typesetting industry",
      flushbarPosition: FlushbarPosition.TOP,
      flushbarStyle: FlushbarStyle.FLOATING,
      reverseAnimationCurve: Curves.decelerate,
      forwardAnimationCurve: Curves.elasticOut,
      backgroundColor: Colors.red,
      boxShadows: [BoxShadow(color: Colors.blue[800], offset: Offset(0.0, 2.0), blurRadius: 3.0)],
      backgroundGradient: LinearGradient(colors: [Colors.blueGrey, Colors.black]),
      isDismissible: false,
      duration: Duration(seconds: 4),
      icon: Icon(
        Icons.check,
        color: Colors.greenAccent,
      ),
      mainButton: FlatButton(
        onPressed: () {},
        child: Text(
          "CLAP",
          style: TextStyle(color: Colors.amber),
        ),
      ),
      showProgressIndicator: true,
      progressIndicatorBackgroundColor: Colors.blueGrey,
      titleText: Text(
        "Hello Hero",
        style: TextStyle(
            fontWeight: FontWeight.bold, fontSize: 20.0, color: Colors.yellow[600], fontFamily: "ShadowsIntoLightTwo"),
      ),
      messageText: Text(
        "You killed that giant monster in the city. Congratulations!",
        style: TextStyle(fontSize: 18.0, color: Colors.green, fontFamily: "ShadowsIntoLightTwo"),
      ),
    )..show(context);

用这个:

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

你可以直接使用小吃店的元素

 ScaffoldMessenger.of(context).showSnackBar(
      SnackBar(
        content: Text("Successfully!"),
        behavior: SnackBarBehavior.floating,
        margin: EdgeInsets.all(20),
          shape: StadiumBorder(),
        action: SnackBarAction(
          label: 'Dismiss',
          disabledTextColor: Colors.white,
          textColor: Colors.blue,
          onPressed: () {
            //Do whatever you want
          },
        ),
      ),
    );

你可以很容易地实现这种效果使用叠加。

代码:

OverlayEntry entry = OverlayEntry(builder: (context) {
              return Positioned(
                  top: MediaQuery.of(context).size.height * 0.8,
                  child: Container(
                    width: MediaQuery.of(context).size.width,
                    alignment: Alignment.center,
                    child: const Card(
                      color: Colors.redAccent,
                      child: Padding(
                        padding: EdgeInsets.all(8),
                        child: Text("This is a message."),
                      ),
                    ),
                  ));
            });

            //show overlay
            Overlay.of(context)!.insert(entry);
            //auto remove this overlay after 3 seconds
            Future.delayed(const Duration(seconds: 3)).then((value) => entry.remove());

截图: