Flutter – How to show dialog

Flutter support both material dialog (Android style) and Cupertino dialog (iOS).

To show a dialog, use showDialog( ) method:

void _showMaterialDialog() {
    showDialog(
        context: context,
        builder: (context) {
          return AlertDialog(
            title: Text('Material Dialog'),
            content: Text('Hey! I am Coflutter!'),
            actions: <Widget>[
              TextButton(
                  onPressed: () {
                    _dismissDialog();
                  },
                  child: Text('Close')),
              TextButton(
                onPressed: () {
                  print('HelloWorld!');
                  _dismissDialog();
                },
                child: Text('HelloWorld!'),
              )
            ],
          );
        });
  }

If you want to show iOS style dialog, Flutter provides that too:

void _showCupertinoDialog() {
    showDialog(
        context: context,
        builder: (context) {
          return CupertinoAlertDialog(
            title: Text('Cupertino Dialog'),
            content: Text('Hey! I am Coflutter!'),
            actions: <Widget>[
              TextButton(
                  onPressed: () {
                    _dismissDialog();
                  },
                  child: Text('Close')),
              TextButton(
                onPressed: () {
                  print('HelloWorld!');
                  _dismissDialog();
                },
                child: Text('HelloWorld!'),
              )
            ],
          );
        });
  }

Here is full example if you want to copy and run:

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

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

class MyStatelessApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Dialog Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: StatelessWidgetDemo(),
    );
  }
}

class StatelessWidgetDemo extends StatefulWidget {
  @override
  _StatelessWidgetDemoState createState() => _StatelessWidgetDemoState();
}

class _StatelessWidgetDemoState extends State<StatelessWidgetDemo> {
  @override
  Widget build(BuildContext context) {
    return SafeArea(
        child: Scaffold(
            appBar: AppBar(
              title: Text('Dialog Demo'),
            ),
            body: Center(
              child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: <Widget>[
                  ElevatedButton(
                    onPressed: () {
                      _showMaterialDialog();
                    },
                    child: Text('Show Material Dialog'),
                  ),
                  SizedBox(
                    height: 20,
                  ),
                  ElevatedButton(
                    onPressed: () {
                      _showCupertinoDialog();
                    },
                    child: Text('Show Cupertino Dialog'),
                  ),
                  SizedBox(
                    height: 20,
                  ),
                  ElevatedButton(
                    onPressed: () {
                      _showSimpleDialog();
                    },
                    child: Text('Show Simple Dialog'),
                  )
                ],
              ),
            )));
  }

  void _showMaterialDialog() {
    showDialog(
        context: context,
        builder: (context) {
          return AlertDialog(
            title: Text('Material Dialog'),
            content: Text('Hey! I am Coflutter!'),
            actions: <Widget>[
              TextButton(
                  onPressed: () {
                    _dismissDialog();
                  },
                  child: Text('Close')),
              TextButton(
                onPressed: () {
                  print('HelloWorld!');
                  _dismissDialog();
                },
                child: Text('HelloWorld!'),
              )
            ],
          );
        });
  }

  _dismissDialog() {
    Navigator.pop(context);
  }

  void _showCupertinoDialog() {
    showDialog(
        context: context,
        builder: (context) {
          return CupertinoAlertDialog(
            title: Text('Cupertino Dialog'),
            content: Text('Hey! I am Coflutter!'),
            actions: <Widget>[
              TextButton(
                  onPressed: () {
                    _dismissDialog();
                  },
                  child: Text('Close')),
              TextButton(
                onPressed: () {
                  print('HelloWorld!');
                  _dismissDialog();
                },
                child: Text('HelloWorld!'),
              )
            ],
          );
        });
  }

  void _showSimpleDialog() {
    showDialog(
        context: context,
        builder: (context) {
          return SimpleDialog(
            title: Text('Chosse an Option'),
            children: <Widget>[
              SimpleDialogOption(
                onPressed: () {
                  _dismissDialog();
                },
                child: const Text('Option 1'),
              ),
              SimpleDialogOption(
                onPressed: () {
                  _dismissDialog();
                },
                child: const Text('Option 2'),
              ),
              SimpleDialogOption(
                onPressed: () {
                  _dismissDialog();
                },
                child: const Text('Option 3'),
              ),
              SimpleDialogOption(
                onPressed: () {
                  _dismissDialog();
                },
                child: const Text('Option 4'),
              ),
            ],
          );
        });
  }
}

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update
update
1 month ago

import ‘package:flutter/cupertino.dart’;
import ‘package:flutter/material.dart’;

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: ‘Flutter Demo’,
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(),
);
}
}

class MyHomePage extends StatefulWidget {

final String title = “”;

@override
_MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
TextButton(
child: Text(‘Show Material Dialog’),
onPressed: _showMaterialDialog,
),
TextButton(
child: Text(‘Show Cupertino Dialog’),
onPressed: _showCupertinoDialog,
),
],
),
),
);
}

_showMaterialDialog() {
showDialog(
context: context,
builder: (_) => new AlertDialog(
title: new Text(“Material Dialog”),
content: new Text(“Hey! I’m Coflutter!”),
actions: <Widget>[
TextButton(
child: Text(‘Close me!’),
onPressed: () {
Navigator.of(context).pop();
},
)
],
));
}

_showCupertinoDialog() {
showDialog(
context: context,
builder: (_) => new CupertinoAlertDialog(
title: new Text(“Cupertino Dialog”),
content: new Text(“Hey! I’m Coflutter!”),
actions: <Widget>[
TextButton(
child: Text(‘Close me!’),
onPressed: () {
Navigator.of(context).pop();
},
)
],
));
}
}

Charles Yeh
Charles Yeh
Reply to  update
1 month ago

thanks for updating ‘FlatButton’ is deprecated and shouldn’t be used. Use TextButton instead. See the migration

Rob
Rob
11 months ago

Well laid out tutorial, thank you!

Tuanz
Tuanz
1 year ago

thanks ad , I understand

estefy
estefy
1 year ago

I was looking for something to tell me how to display the cupertino dialog just for ios devices and the material dialog just for android devices

Lucas
Lucas
Reply to  Phuc Tran
1 year ago

Hey, this series, especially the first few videos, show you how to setup different views/dialogs etc in ios and android. I would suggest you to watch them: https://www.youtube.com/watch?v=7Fk8VZZPxFE

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