flutter/dart: Do not use BuildContexts across async gaps in provider model class

Question

In the provider model I use context after await It shows warning Do not use BuildContexts across async gaps and I am unable to check with mounted because I use it in Provider class. so what I should do to remove this warning? Any help would be appreciated thanks.

class SoloStartSiteScanningProvider extends ChangeNotifier {
  FocusNode boxFocusNode = FocusNode();
  FocusNode locationFocusNode = FocusNode();
  Future checkBoxSealMatching(BuildContext context) async {
    try {    
      var barcode = await _scanBoxBarcode();
      if (barcode != "-1") {
        if (boxFieldController.text == barcode) {
          // Do not use BuildContexts across async gaps
          FocusScope.of(context).requestFocus(locationFocusNode);
        }
      }
    } catch (e) {
      print(" coll lactaion scanning Exception=== $e");
    }
  }
}

Does this answer your question? [Do not use BuildContexts across async gaps](https://stackoverflow.com/questions/68871880/do-not-use-buildcontexts-across-async-gaps) — Georgina, Dec 09 '22 at 17:35

score 1 · Accepted Answer · answered Dec 09 '22 at 18:33

1

Try like this :

Future checkBoxSealMatching(BuildContext context) async {
final focusScope = FocusScope.of(context);
FocusNode boxFocusNode = FocusNode();
...
        if (boxFieldController.text == barcode) {
          focusScope.requestFocus(locationFocusNode);
        }
}

answered Dec 09 '22 at 18:33

Ruble

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Thanks a lot for your answer and this is also the right answer for many other situations – Abdullah Dec 10 '22 at 08:56
what we can do In this scenario if you have any idea plz : Future checkBoxSealMatching(BuildContext context) async { final focusScope = FocusScope.of(context); if (boxFieldController.text == barcode) { getTeam(context); // Do not use BuildContexts across async gaps } } – Abdullah Dec 10 '22 at 12:45
Get it right at the beginning something like this `final teamFuture = getTeam(context);`. When necessary, just wait for the future `final team = await teamFuture;` – Ruble Dec 10 '22 at 13:17

flutter/dart: Do not use BuildContexts across async gaps in provider model class

1 Answers1