Creating a shopping cart application with setState

Without any further ado, let's jump directly into the code, as follows:

1. Create a new Flutter application in the same way as we have been doing in the previous chapters. Name this application cart_set_state.
2. Create a new file named item.dart and add a model class named Item, as follows:

   class Item {
     final String? name;
     final String? price;
     Item({this.name, this.price});
   }

3. In order to create sample data for our product list, we are creating a function that does the work for us. Add the following function below the Item class in the item.dart file:

   List<Item> populateItems() {
     return [
       Item(name: 'Keyboard', price: '24'),
       Item(name: 'Mouse', price: '20'),
       Item(name: 'LED Screen', price: '44'),
       Item(name: &apos...