How to dismissed showDialog with backBoutton?

Question

I have a showDialog called inside FloatingActionButton, I want to dismiss the showDialog when the back button is clicked, but it is returned to the previous page without dismiss

MyCode

 FloatingActionButton(
          onPressed: () async {
        
            await showDialog(
              context: context,
              // useRootNavigator: false,
              builder: (BuildContext context) {
                return AlertDialog(
                  title: Text("Dialog"),
........)

You mean the back button on a physical android device? – krumpli Oct 08 '20 at 15:17 — krumpli, Oct 08 '20 at 15:17

score 2 · Answer 1 · answered Oct 08 '20 at 15:19

2

Because you are passing the wrong context of the page. I had the same issue today i solved it by doing

 FloatingActionButton(
      onPressed: () async {
    
        await showDialog(
          context: context,
          // useRootNavigator: false,
          builder: (BuildContext dialogContext) {
            return AlertDialog(
              title: Text("Dialog"),
........)

and then i popped the dialog with the dialogContext

Navigator.of(dialogContext).pop();

answered Oct 08 '20 at 15:19

Maz341

2,232
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20

how to detect the back button pressed ? – Merym Oct 08 '20 at 15:23
1

backButton wont close dialog, instead you can give a button that closes the dialog. – Maz341 Oct 08 '20 at 15:26
If you want to detect physical back button pressed than you can you WillPopScope – Maz341 Oct 08 '20 at 15:26
1

You can detect the back button pressed with WillPopScope. https://stackoverflow.com/a/49356916/10659482 – Akif Oct 08 '20 at 15:27
That's exactly what i said. Thanks Akif for the link – Maz341 Oct 08 '20 at 15:28
I already tried to wrap my ALertDialog with _onWillPop butck doesnt work – Merym Oct 08 '20 at 15:30
The WillPopScope has to wrap all Scaffold on your page, not only the AlertDialog widget. – Akif Oct 08 '20 at 15:42
yes but there is no way to dismiss a poppo with backButton ? – Merym Oct 08 '20 at 15:44
No! There is no way to dismiss popup with BackButton. – Maz341 Oct 08 '20 at 15:47

How to dismissed showDialog with backBoutton?

1 Answers1