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'),
),
),
),
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