Crafting an Exceptional Ecommerce Experience with Flutter

Getting Started

Before diving into the project, ensure you have the Flutter SDK installed and a basic understanding of the framework. Create a new project using the command flutter create my_app, and open it in your preferred IDE.

Project Structure

Our ecommerce app will consist of three primary screens:

• Product Listings: A grid or list view of products with images, names, and prices.
• Product Details: A page displaying detailed product information, including quantity selection and add-to-cart functionality.
• Shopping Cart: A screen showcasing the user’s selected products, with options for removal and checkout.

Building the Product Listings Screen

To create the product listings screen, use a GridView or ListView widget, depending on your desired layout. For this example, we’ll use a GridView. Populate the grid with product data, which can be retrieved from a backend server or stored locally.

GridView.builder(
  gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
    crossAxisCount: 2,
  ),
  itemCount: products.length,
  itemBuilder: (context, index) {
    return ProductCard(products[index]);
  },
)

Product Details Screen

The product details screen should display detailed product information, including quantity selection and add-to-cart functionality. Use a Column widget to structure the content.

Column(
  children: [
    ProductImage(),
    ProductName(),
    ProductPrice(),
    QuantitySelector(),
    AddToCartButton(),
  ],
)

Shopping Cart Screen

The shopping cart screen should display the user’s selected products, with options for removal and checkout. Use a ListView widget to populate the cart contents.

ListView.builder(
  itemCount: cartItems.length,
  itemBuilder: (context, index) {
    return CartItem(cartItems[index]);
  },
)

Managing State with Bloc

To manage the shopping cart and product data, we’ll use the Bloc state management pattern. This involves creating three essential classes: Bloc, Event, and State.

class CartBloc extends Bloc<CartEvent, CartState> {
  //...
}

class CartEvent {}

class CartState {}

Adding Animations with Material Motion

To enhance the user experience, we’ll add animations using the Material motion system. Wrap the product details screen with an OpenContainer widget to create a smooth transition.

OpenContainer(
  closedBuilder: (context, action) {
    return ProductCard();
  },
  openBuilder: (context, action) {
    return ProductDetailsScreen();
  },
)