flutter-demo/lib/screens/item_list_screen.dart

import 'package:flutter/material.dart';
import 'package:item_tracker/provider/item_provider.dart';
import 'package:item_tracker/screens/item_screens/add_item_screen.dart';
import 'package:provider/provider.dart';

import 'item_screens/detail_item_screen.dart';

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

class _ItemListScreenState extends State<ItemListScreen> {
  late ItemProvider _itemProvider;

  @override
  void initState() {
    super.initState();
    Future.microtask(() {
      _itemProvider = Provider.of<ItemProvider>(context, listen: false);
      _itemProvider.loadItems();
    });
  }

  Future<void> _refreshData() async {
    await _itemProvider.loadItems(); // 刷新数据
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('物品列表'),
      ),
      body: Consumer<ItemProvider>(builder: (context, provider, _) {
        final items = provider.items;

        if (items.isEmpty) {
          return Center(child: Text("暂无物品"));
        }

        return RefreshIndicator(
            onRefresh: _refreshData,
            child: ListView.builder(
                itemCount: items.length,
                itemBuilder: (_, index) {
                  final item = items[index];
                  return ListTile(
                    title: Text(item.name),
                    subtitle: Text(item.description ?? ""),
                    onTap: () {
                      Navigator.push(
                        context,
                        MaterialPageRoute(
                          builder: (context) => AddItemScreen(itemToEdit: item),
                        ),
                      );
                    },
                  );
                }));
      }),
      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,
        ),
      ),
    );
  }
}