flutter 网络是否可用,监听网络变化

雨点打透心脏的1/2处 2023-07-03 03:28 34阅读 0赞

StreamSubscription<ConnectivityResult> _connectivitySubscription;
    //网络初始状态
    connectivityInitState() {
      _connectivitySubscription =
          Connectivity().onConnectivityChanged.listen((ConnectivityResult result) {
        print('=======' + result.toString());
        if (result == ConnectivityResult.none) {
          UiUtil.showToast('网络已断开,请链接网络!');
          isConnectServerAvailable = false;
          StoreState.status = getXMMPConnectionStatus('DISCONNECTING');
          ConnectRefreshAction action = ConnectRefreshAction(StoreState.status);
          StoreState.connectStore.dispatch(action);
        } else {
          //UiUtil.showToast('链接中...');
          //每次网络变化都会检查网络
          checkClientState();
        }
        //这个位置不能动
        networkStatus = result;
      });
    }
    
    //网络结束监听
    connectivityDispose() {
      _connectivitySubscription.cancel();
    }
    
    //网络进行监听
    Future<Null> initConnectivity() async {
      String connectionStatus;
      //平台消息可能会失败，因此我们使用Try/Catch PlatformException。
      try {
        connectionStatus = (await Connectivity().checkConnectivity()).toString();
        if (connectionStatus == ConnectivityResult.mobile) {
        } else if (connectionStatus == ConnectivityResult.wifi) {}
      } on PlatformException catch (e) {
        print(e.toString());
        connectionStatus = 'Failed to get connectivity.';
      }
    }

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[format_png]: https://imgconvert.csdnimg.cn/aHR0cHM6Ly91c2VyLWdvbGQtY2RuLnhpdHUuaW8vMjAyMC8yLzEvMTcwMDA3YmU1NGNlODBmNw?x-oss-process=image/format,png