How to cast Object to a specified type in Flutter

Question

I get a linter error but don't know how to fix it

final FoodScreenArguments args = ModalRoute.of(context).settings.arguments;

A value of type Object can't be assigned to a variable of type FoodScreenArguments.

Try changing the type of the variable, or casting the right-hand type to FoodScreenArguments .

Solution 1

Easiest way :

final args = ModalRoute.of(context).settings.arguments as FoodScreenArguments ;

Solution 2

Unlike java's parentheses casting (), in flutter, it uses as keyword. Here is an example from my code where I am printing a variable of class.

debugPrint("rht: List size ${((albumList1.first) as AlbumData).title}");

Solution 3

In cases where you are working with a collection that you don’t create, such as from JSON or an external data source, you can use the cast() method provided by Iterable implementations, such as List.

Map<String, dynamic> json = fetchFromExternalSource();
var names = json['names'] as List;
assumeStrings(names.cast<String>());

Comments

[zoom xu]

Thanks, i followed Dude's advice and fixed it