pubspec.yaml

sweetalert: any

main.dart

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

void main() {
  String title = "Sweet Alert";
  Color bgColor = Colors.blue;
  Color fgColor = Colors.white;
  IconData icLogo = Icons.star_border;

  runApp(new MaterialApp(
      debugShowCheckedModeBanner: false,
      title: title,
      home: Scaffold(
        backgroundColor: fgColor,
        appBar: new AppBar(
          backgroundColor: bgColor,
          leading: Icon(icLogo),
          title: Text(title),
        ),
        body: Layout(),
      )));
}

class Layout extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Column(
      children: <Widget>[

        Row(
          children: <Widget>[


            RaisedButton(
              child: Text("Basic"),
              onPressed: () {
                SweetAlert.show(context, title: "Just show a message");
              },
            ),


            RaisedButton(
              child: Text("Subtitle"),
              onPressed: () {
                SweetAlert.show(context,
                    title: "Just show a message",
                    subtitle: "Sweet alert is pretty");
              },
            ),


            RaisedButton(
              child: Text("Success"),
              onPressed: () {
                SweetAlert.show(context,
                    title: "Just show a message",
                    subtitle: "Sweet alert is pretty",
                    style: SweetAlertStyle.success);
              },
            ),


            RaisedButton(
              child: Text("Error"),
              onPressed: () {
                SweetAlert.show(context,
                    title: "Just show a message",
                    subtitle: "Sweet alert is pretty",
                    style: SweetAlertStyle.error);
              },
            ),


          ],
        ),


        Row(
          children: <Widget>[


            RaisedButton(
              child: Text("Confirm"),
              onPressed: () {
                SweetAlert.show(context,
                    title: "Just show a message",
                    subtitle: "Sweet alert is pretty",
                    style: SweetAlertStyle.confirm,
                    showCancelButton: true, onPress: (bool isConfirm) {
                  if (isConfirm) {
                    SweetAlert.show(context,
                        style: SweetAlertStyle.success, title: "Success");
                    // return false to keep dialog
                    return false;
                  }
                });
              },
            ),


            RaisedButton(
              child: Text("Confirm 2"),
              onPressed: () {
                SweetAlert.show(context,
                    subtitle: "Do you want to delete this message",
                    style: SweetAlertStyle.confirm,
                    showCancelButton: true, onPress: (bool isConfirm) {
                  if (isConfirm) {
                    SweetAlert.show(context,
                        subtitle: "Deleting...",
                        style: SweetAlertStyle.loading);
                    new Future.delayed(new Duration(seconds: 2), () {
                      SweetAlert.show(context,
                          subtitle: "Success!", style: SweetAlertStyle.success);
                    });
                  } else {
                    SweetAlert.show(context,
                        subtitle: "Canceled!", style: SweetAlertStyle.error);
                  }
                  // return false to keep dialog
                  return false;
                });
              },
            ),

            
          ],
        ),
      ],
    );
  }
}