59 lines
1.7 KiB
Dart
59 lines
1.7 KiB
Dart
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import 'dart:async';
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import 'dart:io';
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import 'package:connectivity_plus/connectivity_plus.dart';
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import 'package:get/get.dart';
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typedef NetworkStatusCallback = void Function(bool isConnected);
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class NetworkUtils {
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static final NetworkUtils _instance = NetworkUtils._internal();
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factory NetworkUtils() => _instance;
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NetworkUtils._internal();
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final Connectivity _connectivity = Connectivity();
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StreamSubscription<List<ConnectivityResult>>? _subscription;
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/// RxBool 响应式网络状态
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final RxBool _isConnected = false.obs;
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/// 初始化网络监听
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void initialize({NetworkStatusCallback? onStatusChange}) async {
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// 先检查一次当前网络
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_isConnected.value = await checkNetworkAvailable();
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onStatusChange?.call(_isConnected.value);
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// 监听网络变化
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_subscription = _connectivity.onConnectivityChanged.listen((result) async {
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bool newStatus = await checkNetworkAvailable();
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if (newStatus != _isConnected.value) {
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_isConnected.value = newStatus;
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onStatusChange?.call(_isConnected.value);
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}
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});
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}
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/// 检查网络是否可用
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Future<bool> checkNetworkAvailable() async {
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final connectivityResult = await _connectivity.checkConnectivity();
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if (connectivityResult.first == ConnectivityResult.none) return false;
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try {
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final result = await InternetAddress.lookup('wuzhongjie.com.cn');
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return result.isNotEmpty && result[0].rawAddress.isNotEmpty;
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} on SocketException catch (_) {
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return false;
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}
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}
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/// 当前网络状态（响应式访问）
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RxBool get isConnected => _isConnected;
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/// 取消监听
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void dispose() {
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_subscription?.cancel();
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}
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}
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