ScaffoldMessenger.of(context).showSnackBar(SnackBar(
content: Text("Your Text"),
duration: Duration(milliseconds: 300),
));ScaffoldMessenger.of(context).hideCurrentSnackBar();final snackBar = SnackBar(
content: const Text('Yay! A SnackBar!'),
action: SnackBarAction(
label: 'Undo',
onPressed: () {},
),
);
ScaffoldMessenger.of(context).showSnackBar(snackBar);final snackBar = SnackBar(
content: Text('Yay! A SnackBar!'),
action: SnackBarAction(
label: 'Undo',
onPressed: () {
// Some code to undo the change.
},
),
);
// Find the Scaffold in the widget tree and use
// it to show a SnackBar.
Scaffold.of(context).showSnackBar(snackBar);final snackBar = SnackBar(content: Text('Yay! A SnackBar!'));
// Find the ScaffoldMessenger in the widget tree
// and use it to show a SnackBar.
ScaffoldMessenger.of(context).showSnackBar(snackBar);
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Flutter',
theme: new ThemeData(
primarySwatch: Colors.blue,
),
home: new MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key}) : super(key: key);
@override
_MyHomePageState createState() => new _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey<ScaffoldState>();
@override
void initState() {
super.initState();
showInSnackBar("Some text");
}
@override
Widget build(BuildContext context) {
return new Padding(
key: _scaffoldKey,
padding: const EdgeInsets.all(16.0),
child: new Text("Simple Text")
);
}
void showInSnackBar(String value) {
_scaffoldKey.currentState.showSnackBar(new SnackBar(
content: new Text(value)
));
}
}