import 'package:flutter/material.dart';
import 'package:flutter_mdns_plugin/flutter_mdns_plugin.dart';class MyApp1 extends StatefulWidget {const MyApp1({super.key});@overrideState<MyApp1> createState() => _MyApp1State();
}class _MyApp1State extends State<MyApp1> {List<String> devices = [];bool isScanning = false;List<String> messageLog = <String>[];//设备扫描函数Future<void> scanDevices() async {setState(() {isScanning = true;devices.clear();});const String serviceType = '_http._tcp';DiscoveryCallbacks discoveryCallbacks = DiscoveryCallbacks(onDiscovered: (ServiceInfo info) {print("Discovered ${info.toString()}");},onDiscoveryStarted: () {print("Discovery started");},onDiscoveryStopped: () {print("Discovery stopped");},onResolved: (ServiceInfo info) {print("Resolved Service ${info.toString()}");setState(() {devices.add(info.toString());});},);final mdnsPlugin =  FlutterMdnsPlugin(discoveryCallbacks: discoveryCallbacks);try {await mdnsPlugin.startDiscovery(serviceType);await Future.delayed(const Duration(seconds: 1)); // 扫描5秒钟await mdnsPlugin.stopDiscovery();} catch (e) {print('Error during device scan: $e');}setState(() {isScanning = false;});}@overrideWidget build(BuildContext context) {return Scaffold(appBar: AppBar(title: const Text('Device Scanner'),),body: Column(children: [ElevatedButton(onPressed: isScanning ? null : scanDevices,child: const Text('Scan Devices'),),const SizedBox(height: 16),if (isScanning)const CircularProgressIndicator()else if (devices.isEmpty)Text('No devices found.')elseExpanded(child: ListView.builder(itemCount: devices.length,itemBuilder: (context, index) {return ListTile(title: Text(devices[index]),);},),),],),);}
}