flutter showing snackbar code example

Example 1: flutter snackbar showing error

You can show material design snackbars using the following code:

Scaffold.of(context).showSnackBar(SnackBar(
      content: Text("New Notification"),
    ));
 
In some cases, this will throw an error and it can be resolved using a workaround:

//Declare a GlobalKey
GlobalKey<ScaffoldState> _scaffoldKey = GlobalKey<ScaffoldState>();

//Assing this key to the scaffold
Scaffold(
  key: _scaffoldKey,
  body: ...
)

//finally in the topmost code use this key in the following way
_scaffoldKey.showSnackBar(SnackBar(
      content: Text("New Notification"),
    ));

Example 2: flutter snackbar replacement

ScaffoldMessenger.of(context).showSnackBar(SnackBar(
  content: const Text('snack'),
  duration: const Duration(seconds: 1),
  action: SnackBarAction(
	label: 'ACTION',
	onPressed: () { },
  ),
));