Flutter 获取设备网络类型

前言

现在有一个需求，需要能够知道手机端网络类型，如果是WiFi则去使用局域网通信。在这里我选用了connectivity_plus这个库

connectivity_plus的平台支持

connectivity_plus的API

 示例代码

void scanType() async {
   final connectivityResult = await (Connectivity().checkConnectivity());
   if (connectivityResult == ConnectivityResult.mobile) {
     // I am connected to a mobile network.
     print("移动网络");
   } else if (connectivityResult == ConnectivityResult.wifi) {
     // I am connected to a wifi network.
     print("wifi网络");
   } else if (connectivityResult == ConnectivityResult.ethernet) {
     // I am connected to a ethernet network.
     print("以太网");
   } else if (connectivityResult == ConnectivityResult.vpn) {
     // I am connected to a vpn network.
     // Note for iOS and macOS:
     // There is no separate network interface type for [vpn].
     // It returns [other] on any device (also simulator)
     print("vpn网络");
   } else if (connectivityResult == ConnectivityResult.bluetooth) {
     // I am connected to a bluetooth.
     print("蓝牙");
   } else if (connectivityResult == ConnectivityResult.other) {
     // I am connected to a network which is not in the above mentioned networks.
     print("其他网络");
   } else if (connectivityResult == ConnectivityResult.none) {
     // I am not connected to any network.
     print("无网络");
   }
 }
 
 changeScan() {
   StreamSubscription subscription = Connectivity()
       .onConnectivityChanged
       .listen((ConnectivityResult result) {
     print("改变了情况:$result");
   });
 }