Detect back button press while dialog is open in flutter
Back button won't close the dialog.
showDialog( context: context, barrierDismissible: false, builder: (BuildContext context) { return WillPopScope( onWillPop: () async => false, child: AlertDialog( title: Text('Title'), content: Text('This is Demo'), actions: <Widget>[ FlatButton( onPressed: () => Navigator.pop(context), child: Text('Go Back'), ), ], ), ); },);
Three ways to stop dialog getting closed by Android Back Button
Option one:
onWillPop: () { return Future.value(false); },Option Two:
onWillPop: () async { return false; },Option Three:
onWillPop: () {}, // This will give surpress warning, try to avoid this one.
Because my reputation not enough to comment on the accepted answer, I want to give other alternative for onPressed: () {}. You can use onPressed: () => null. No warning will pop up.