Boolean expression must not be null?

Question

Does anyone know why i got the Failed assertion: boolean expression must not be null. If I had logged in and quit the app and open the app again i should be directly in the home

Answer 1

Your issue most likely lies in this function where you're setting userIsLoggedIn to null. Ensure getUserLoggedInSharedPreference actually returns a boolean and not null.

  void getLoggedInState() async {
    final result = await HelperFunction.getUserLoggedInSharedPreference();
    if (result != null) {
      setState(() {
        userIsLoggedIn = result;
      });
    } else {
      print("result is null");
    }
  }