In some sceanarios we want to behaviour of the android back button press event of the current screen. To disable back button event in the flutter there is a widget called WillPopScope widget which can handle the back button event in the android devices. Example to handle the back button event in flutter This will disable the android back button event, if we want to go abck to previous screen we can use Navigatior.pop() method
@override
Widget build(BuildContext context) {
return new WillPopScope(
onWillPop: () async => false,
child: new Scaffold(
appBar: new AppBar(
title: new Text("data"),
leading: new IconButton(
icon: new Icon(Icons.ac_unit),
onPressed: () => Navigator.of(context).pop(),
),
),
),
);
}
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