'How to use same SharedPreferences instance when FLUTTER app is on foreground state

I need to access the app shared preferences to save some data from push notification,

SharedPreferences prefs = await SharedPreferences.getInstance();

above won't get the shared preference instance that use in app state. how can I use same shared preferences for all state of the app.

Solution 1:^[1]

I think that you can use this package Flutter Background Service.

It helps to execute dart code in background.

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Solution	Source
Solution 1	lasd