iv_and/customer_list_screen.dart

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'customer_provider.dart';

class CustomerListScreen extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final customerProvider = Provider.of<CustomerProvider>(context);

    return Scaffold(
      appBar: AppBar(
        title: Text('顧客一覧'),
      ),
      body: FutureBuilder<void>(
        future: customerProvider.fetchCustomers(),
        builder: (context, snapshot) {
          if (snapshot.connectionState == ConnectionState.waiting) {
            return Center(child: CircularProgressIndicator());
          } else {
            return ListView.builder(
              itemCount: customerProvider.customers.length,
              itemBuilder: (context, index) {
                final customer = customerProvider.customers[index];
                return ListTile(
                  title: Text(customer.name),
                  subtitle: Text(customer.phone),
                );
              },
            );
          }
        },
      ),
    );
  }
}