how to disable phone back press in flutter

Question

I am new to Flutter development. Can anyone share me how to disable the back press in flutter?

In Android, we can use onbackpressed method.

@Override
public void onBackPressed() {
  // super.onBackPressed(); commented this line in order to disable back press
  //Write your code here
  Toast.makeText(getApplicationContext(), "Back press disabled!", Toast.LENGTH_SHORT).show();
}

In flutter how it possible to do?

take a look at this answer: https://stackoverflow.com/questions/49356664/how-to-override-the-back-button-in-flutter — Farbod Shahinfar, Aug 14 '18 at 05:08

score 21 · Accepted Answer · edited Feb 17 '20 at 06:43

21

Wrap your widget inside WillPopScope and return a false Future in the onWillPop property

    @override
    Widget build(BuildContext context) {
      return WillPopScope(
        onWillPop: () => Future.value(false),
        child: Scaffold(
          appBar: AppBar(
            title: const Text("Home Page"),
          ),
          body: Center(
            child: const Text("Home Page"),
          ),
        ),
      );
    }

Refer to this documentation: https://api.flutter.dev/flutter/widgets/WillPopScope-class.html

edited Feb 17 '20 at 06:43

drmirk

403
1
7
14

answered Aug 14 '18 at 05:16

diegoveloper

93,875
20
236
194

Is it just for back button or home button and recent activity button too? – Ray Coder Nov 23 '20 at 16:00
we can't block the home button – diegoveloper Nov 23 '20 at 16:26
Can we use event for home button? For example if click home button will need password – Ray Coder Nov 23 '20 at 16:37
2

Is there an easy way to disable it for the whole app? Or do I have to wrap every screen with WillPopScope – Donki Feb 03 '21 at 23:29

score 2 · Answer 2 · answered Apr 11 '19 at 07:36

The easiest way is to use WillPopScope but here's an alternative method if for some reason you don't want to or can't use the WillPopScope widget.

class MyWidget extends StatefulWidget {
  @override
  _MyWidgetState createState() => _MyWidgetState();
}

class _MyWidgetState extends State<MyWidget> {
  ModalRoute<dynamic> _route;

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    _route?.removeScopedWillPopCallback(_onWillPop);
    _route = ModalRoute.of(context);
    _route?.addScopedWillPopCallback(_onWillPop);
  }

  @override
  void dispose() {
    _route?.removeScopedWillPopCallback(_onWillPop);
    super.dispose();
  }

  Future<bool> _onWillPop() => Future.value(false);

  @override
  Widget build(BuildContext context) => Container();
}

@OjonugwaJudeOchalifu I can't remember exactly why I posted this or why one would prefer this solution over just using WillPopScope. It's almost exactly what WillPopScope does. Just look at https://github.com/flutter/flutter/blob/master/packages/flutter/lib/src/widgets/will_pop_scope.dart and also check the API docs for WillPopScope and ModalRoute for better understanding. — apaatsio, May 27 '20 at 12:53

score 1 · Answer 3 · answered Nov 01 '22 at 08:01

1

just set automaticallyImplyLeading: false,under appbar property

answered Nov 01 '22 at 08:01

Sharad Gore

21
2

how to disable phone back press in flutter

3 Answers3

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