用android写一个汽车商城代码

好的，以下是一个简单的汽车商城代码示例，实现了浏览汽车、加入购物车和下订单的功能。请注意，这只是一个简单的示例，您需要根据自己的需求进行修改和完善。

1. 首先，创建一个包含汽车属性的Car类，如下所示：

public class Car {
    private String brand;
    private String model;
    private int price;
    private String color;
    private int image;

    public Car(String brand, String model, int price, String color, int image) {
        this.brand = brand;
        this.model = model;
        this.price = price;
        this.color = color;
        this.image = image;
    }

    public String getBrand() {
        return brand;
    }

    public String getModel() {
        return model;
    }

    public int getPrice() {
        return price;
    }

    public String getColor() {
        return color;
    }

    public int getImage() {
        return image;
    }
}

2. 创建一个汽车列表页面CarListActivity，在该页面中展示汽车列表，如下所示：

public class CarListActivity extends AppCompatActivity {
    private ArrayList<Car> carList;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_car_list);

        carList = new ArrayList<>();
        carList.add(new Car("Toyota", "Corolla", 20000, "Red", R.drawable.corolla));
        carList.add(new Car("Honda", "Civic", 25000, "Blue", R.drawable.civic));
        carList.add(new Car("Ford", "Mustang", 35000, "Yellow", R.drawable.mustang));
        carList.add(new Car("BMW", "325i", 40000, "Black", R.drawable.bmw));

        RecyclerView recyclerView = findViewById(R.id.recyclerView);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        CarListAdapter adapter = new CarListAdapter(carList);
        recyclerView.setAdapter(adapter);
    }
}

在汽车列表页面中，我们使用RecyclerView展示汽车列表，并创建一个CarListAdapter作为RecyclerView的适配器，如下所示：

public class CarListAdapter extends RecyclerView.Adapter<CarListAdapter.ViewHolder> {
    private ArrayList<Car> carList;

    public CarListAdapter(ArrayList<Car> carList) {
        this.carList = carList;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_car, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        Car car = carList.get(position);
        holder.brandTextView.setText(car.getBrand());
        holder.modelTextView.setText(car.getModel());
        holder.priceTextView.setText("$" + car.getPrice());
        holder.colorTextView.setText(car.getColor());
        holder.imageView.setImageResource(car.getImage());
        holder.addButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 将汽车加入购物车
            }
        });
    }

    @Override
    public int getItemCount() {
        return carList.size();
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        public TextView brandTextView;
        public TextView modelTextView;
        public TextView priceTextView;
        public TextView colorTextView;
        public ImageView imageView;
        public Button addButton;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            brandTextView = itemView.findViewById(R.id.brandTextView);
            modelTextView = itemView.findViewById(R.id.modelTextView);
            priceTextView = itemView.findViewById(R.id.priceTextView);
            colorTextView = itemView.findViewById(R.id.colorTextView);
            imageView = itemView.findViewById(R.id.imageView);
            addButton = itemView.findViewById(R.id.addButton);
        }
    }
}

在CarListAdapter中，我们使用了ViewHolder模式，将汽车的各个属性展示在item_car.xml中定义的布局中，并为“加入购物车”按钮设置点击事件。

3. 创建一个购物车页面CartActivity，在该页面中展示购物车中的商品列表，如下所示：

public class CartActivity extends AppCompatActivity {
    private ArrayList<Car> cartList;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_cart);

        cartList = new ArrayList<>();
        RecyclerView recyclerView = findViewById(R.id.recyclerView);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        CartListAdapter adapter = new CartListAdapter(cartList);
        recyclerView.setAdapter(adapter);
    }
}

在购物车页面中，我们同样使用RecyclerView展示购物车中的商品列表，并创建一个CartListAdapter作为RecyclerView的适配器，如下所示：

public class CartListAdapter extends RecyclerView.Adapter<CartListAdapter.ViewHolder> {
    private ArrayList<Car> cartList;

    public CartListAdapter(ArrayList<Car> cartList) {
        this.cartList = cartList;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_cart, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        Car car = cartList.get(position);
        holder.brandTextView.setText(car.getBrand());
        holder.modelTextView.setText(car.getModel());
        holder.priceTextView.setText("$" + car.getPrice());
        holder.colorTextView.setText(car.getColor());
        holder.imageView.setImageResource(car.getImage());
    }

    @Override
    public int getItemCount() {
        return cartList.size();
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        public TextView brandTextView;
        public TextView modelTextView;
        public TextView priceTextView;
        public TextView colorTextView;
        public ImageView imageView;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            brandTextView = itemView.findViewById(R.id.brandTextView);
            modelTextView = itemView.findViewById(R.id.modelTextView);
            priceTextView = itemView.findViewById(R.id.priceTextView);
            colorTextView = itemView.findViewById(R.id.colorTextView);
            imageView = itemView.findViewById(R.id.imageView);
        }
    }
}

在CartListAdapter中，同样使用ViewHolder模式，将购物车中的商品展示在item_cart.xml中定义的布局中。

4. 创建一个订单页面OrderActivity，在该页面中展示订单详情，如下所示：

public class OrderActivity extends AppCompatActivity {
    private ArrayList<Car> orderList;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_order);

        orderList = new ArrayList<>();
        RecyclerView recyclerView = findViewById(R.id.recyclerView);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        OrderListAdapter adapter = new OrderListAdapter(orderList);
        recyclerView.setAdapter(adapter);
    }
}

在订单页面中，同样使用RecyclerView展示订单详情中的商品列表，并创建一个OrderListAdapter作为RecyclerView的适配器，如下所示：

public class OrderListAdapter extends RecyclerView.Adapter<OrderListAdapter.ViewHolder> {
    private ArrayList<Car> orderList;

    public OrderListAdapter(ArrayList<Car> orderList) {
        this.orderList = orderList;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_order, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        Car car = orderList.get(position);
        holder.brandTextView.setText(car.getBrand());
        holder.modelTextView.setText(car.getModel());
        holder.priceTextView.setText("$" + car.getPrice());
        holder.colorTextView.setText(car.getColor());
        holder.imageView.setImageResource(car.getImage());
    }

    @Override
    public int getItemCount() {
        return orderList.size();
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        public TextView brandTextView;
        public TextView modelTextView;
        public TextView priceTextView;
        public TextView colorTextView;
        public ImageView imageView;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            brandTextView = itemView.findViewById(R.id.brandTextView);
            modelTextView = itemView.findViewById(R.id.modelTextView);
            priceTextView = itemView.findViewById(R.id.priceTextView);
            colorTextView = itemView.findViewById(R.id.colorTextView);
            imageView = itemView.findViewById(R.id.imageView);
        }
    }
}

在OrderListAdapter中，同样使用ViewHolder模式，将订单详情中的商品展示在item_order.xml中定义的布局中。

5. 最后，在CarListActivity中为“加入购物车”按钮设置点击事件，并将选中的商品添加到购物车中：

holder.addButton.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        Car car = carList.get(position);
        cartList.add(car);
        Toast.makeText(getApplicationContext(), "Added to cart", Toast.LENGTH_SHORT).show();
    }
});

在购物车页面中，用户可以查看已选中的商品，并在订单页面中下订单。

以上是一个简单的汽车商城代码示例，您可以根据自己的需求进行修改和完善。