Flutter snackbar

    ScaffoldMessenger.of(context).showSnackBar(SnackBar(
                content: Text("Your Text"),
                duration: Duration(milliseconds: 300),
              ));

Flutter snackbar

final snackBar = SnackBar(
            content: const Text('Yay! A SnackBar!'),
            action: SnackBarAction(
              label: 'Undo',
              onPressed: () {},
            ),
          );
ScaffoldMessenger.of(context).showSnackBar(snackBar);

Source: flutter.dev

Snackbar flutter

ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(
            duration: const Duration(milliseconds: 5000), 
            content: const Text('Awesome Snackbar!'),
          ),
        );

Flutter 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)
    ));
  }
}

Source: stackoverflow.com

Flutter 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);

Flutter dissmis snackbar

ScaffoldMessenger.of(context).hideCurrentSnackBar();

Source: stackoverflow.com

Similar codes

4 votes319 views2 answers
RenderBox was not laid out: RenderRepaintBoundary#5141b relayoutBoundary=up5 NEEDS-PAINT 'package:flutter/src/rendering/box.dart': package:flutter/…/rendering/box.dart:1 Failed assertion: line 1930 pos 12: 'hasSize'
Dart
0 vote322 views1 answer
Flutter pageview show next page
Dart
2 votes371 views1 answer
Dart cascade
Dart
9 votes346 views1 answer
Dart ternary operator multiple
Dart
0 vote333 views1 answer
Dart floor
Dart
9 votes343 views3 answers
Dart foreach
Dart
6 votes327 views1 answer
Flutter listtile shape
Dart
0 vote341 views1 answer
Flutter outline button overlay
Dart
4 votes388 views1 answer
How to add a margin or padding to a Snackbar?
Dart
0 vote320 views1 answer
Hive dart type adapter
Dart