flutter-demo/lib/screens/item_list_screen.dart

import 'package:flutter/material.dart';
import 'package:item_tracker/screens/addItem/add_item_screen.dart';

import '../database/sqlite_operation.dart';

class ItemListScreen extends StatefulWidget {
  @override
  _ItemListScreenState createState() => _ItemListScreenState();
}

class _ItemListScreenState extends State<ItemListScreen> {
  late Future<List<Map<String, dynamic>>> _itemsFuture;

  @override
  void initState() {
    super.initState();
    _itemsFuture = getAllItems(); // 初始化 Future
  }

  Future<void> _refreshData() async {
    setState(() {
      _itemsFuture = getAllItems(); // 更新 Future，触发 FutureBuilder 重新加载数据
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('物品列表'),
      ),
      body: RefreshIndicator(
        child: FutureBuilder<List<Map<String, dynamic>>>(
          future: _itemsFuture, // 绑定到可变的 Future 对象
          builder: (context, snapshot) {
            if (snapshot.connectionState == ConnectionState.waiting) {
              return Center(child: CircularProgressIndicator());
            } else if (snapshot.hasError) {
              return Center(child: Text('Error: ${snapshot.error}'));
            } else {
              final items = snapshot.data ?? [];
              return ListView.builder(
                itemCount: items.length,
                itemBuilder: (context, index) {
                  final item = items[index];
                  return ListTile(
                    title: Text(item['name']),
                    subtitle: Text(item['context']),
                  );
                },
              );
            }
          },
        ),
        onRefresh: _refreshData,
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () async {
          final shouldRefresh = await Navigator.push(
            context,
            MaterialPageRoute(builder: (context) => AddItemScreen()),
          );

          print('shouldRefresh${shouldRefresh}');

          if (shouldRefresh == true) {
            print('刷新中');
            _refreshData();
          }
        },
        child: Icon(
          Icons.add,
          color: Colors.white,
        ),
      ),
    );
  }
}