This Exception was cause by using the context of Scaffold widget instead of Child widget in the widget Tree. We handle this exception by two ways Option1) Using Builder widget Option1) By Using Scaffold key
Scaffold(
appBar: AppBar(
title: Text('Builder Widget'),
),
body: Builder(
builder: (context) =>
Center(
child: RaisedButton(
color: Colors.pink,
textColor: Colors.white,
onPressed: () {
final snackBar = SnackBar(content: Text('Flutter SnackBar'));
Scaffold.of(context).showSnackBar(snackBar);
},
child: Text('Display SnackBar'),
),
),
),
);
GlobalKey<ScaffoldState>_scaffoldKey=GlobalKey();
Scaffold(
key: _scaffoldKey,
appBar: AppBar(
title: Text('Builder Widget'),
),
body: Center(
child: RaisedButton(
color: Colors.pink,
textColor: Colors.white,
onPressed: () {
final snackBar = SnackBar(content: Text('Flutter SnackBar'));
_scaffoldKey.currentState.showSnackBar(snackBar);
},
child: Text('Display SnackBar'),
),
),
),
How can i use hexadecimal color code in Flutter?
How can i get document id in Flutter Firestore?
How do I open a web browser (URL) from my Flutter code?
How to make shadow for Container widget Flutter?
How to Close Flutter application Programmatically?
What corresponds to Intent in Flutter?
Flutter Questions and Answers
How to set the TextFormField/TextField border color
How to display snackbar infinite duration in a flutter application
How to remove Yellow lines under Text Widgets in Flutter?
How do we save the data in browser's cookies using the Flutter web?
How to change the application launcher icon on Flutter?
Can we use Container color and decoration properties at once?
What is Flutter?
OS Error: A required privilege is not held by the client errno = 1314
How to fix Flutter Bottom OverFlowed error A RenderFlex overflowed by XX pixels on the bott
How does Flutter load images?
How to navigate to new screen without back screen
How to place a listview inside a SingleChildScrollView but prevent them from scrolling separately?
How to create Gradient background for AppBar in Flutter
How to change package name in flutter?
Navigator operation requested with a context that does not include a Navigator.
How to handle the code after showDialog is dismissed in Flutter?
How to deactivate back button in flutter?
How to check the given value is a number or not in dart?
How do i make CachedNetwork image as rounded circle in flutter?
Error : MediaQuery.of() called with a context that does not contain a MediaQuery No MediaQuery ances
How to fix Flutter: error:MissingPluginException(No implementation found for method)
How to copy text from Text Widget flutter?
How to create Toast in Flutter?
How do i change the OutlineInputBorder color?
How do i make TextButton full width in flutter?
How do i make circular icon Inside Button ?
How to convert a String value to double in flutter?
Flutter - Vertical Divider - How to add Vertical Divider?
How to make a widget Center vertically inside a SingleChildScrollView
How to remove debug banner in flutter?
How to find the Screen orientation in flutter
How do I supply/set an initial value to a text field in Flutter ?
Cannot run with sound null safety because dependencies don't support null safety, I have receive