Clear state in Flutter when using Provider

Question

How can I clear the current state of my providers manually in my Flutter app? The use case I have is when a user signs out of my app then signs up as a new/different user the previous users state is still stored in the providers, it is cleared automatically when the app is restarted however.

Without using Provider you can just initialize your widget again — Mohit Shetty, Sep 03 '19 at 17:48

score 5 · Accepted Answer · answered Sep 03 '19 at 18:32

5

You can use keys to hard-reset the state of a subtree.

And if you want to reset the subtree only partially, you can add a GlobalKey on the top of the other key.

In the end you'll have:

Widget build(BuildContext context) {
  return Provider(
    key: ObjectKey(someIdentifier),
    builder: (_) => Foo(),
    child: SomeSubtree(
      key: GlobalObjectKey(context),
    ),
  );
}

In such case, if someIdentifier changes, the state of Provider will reset but Subtree will be preserved.

answered Sep 03 '19 at 18:32

Rémi Rousselet

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Where do you suggest storing the value of 'someIdentifier' to ensure the state isn't hard-reset unintentionally? – John Sep 03 '19 at 19:34
That depends on your use-case. It could be the userID for example – which doesn't need to be stored anywhere – Rémi Rousselet Sep 03 '19 at 19:41

score 0 · Answer 2 · answered Sep 15 '22 at 13:44

0

The solution for me was to reset the values in the init state. Code: https://stackoverflow.com/a/73732182/16684431.

answered Sep 15 '22 at 13:44

Alberto de Jesús García Peña

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4

Your answer could be improved with additional supporting information. Please [edit] to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community Sep 20 '22 at 11:36

Clear state in Flutter when using Provider

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