Instance of 'Future<dynamic>' in Flutter

Question

I'm getting an int Id from server which in HTTP request in flutter, it is OK and I want to save this value in an variable , but when i call the returned value i get this error Instance of 'Future' , any suggestion ?? Here is the code

                    child: RaisedButton(onPressed:() {
                    CurrentPrjId= SaveProject();
                    print("CurrentPrjId Is saved CurrentPrjId :::::::: " );
                    print(CurrentPrjId);
                    Navigator.of(context).pushReplacementNamed('/AllUSerStories');
                }
//Save Project

  Future SaveProject() async {

//SaveProjectResult has the id of the current created project which i need that for its user stories
var SaveProjectResult = await GetPostProjects().createProject(_ProjectnameController.text, _CustomernameController.text, _dropNewItem, _dropNewItem2, _StartDateController.text, _EndDateController.text,);
print(":::::::::::::::::::::::::::::::The Project Is Created And Here Its ID In SaveProject:::::::::");
print(SaveProjectResult);
return SaveProjectResult;

}

Solution

Without having your code, it's hard to guess, whats going on.. But you may try to wait for the completion of the future.. so do this:

methOdThatLoadsId().then((id) => print("Id that was loaded: $id"));

or

var id = await methodThatLoadsId();

Good luck :)

Comments

[Sami Kanafani]

show your code please

[Maryam Omrani]

hi i added the code

[Maryam Omrani]

i used your first solution but still have the same problem AS : Instance of 'Future'

[Kamlesh]

how can we use await in initState function? Thanks.

[ehhc]

@Kamlesh as far as i know, that's not possible at all. Nontheless, there are several ways on how you can work with async-tasks in initState. See stackoverflow.com/a/51901192/11266880 for one solution