#鸿蒙通关秘籍#如何在鸿蒙系统获取设备的Wifi信息？

在鸿蒙系统上获取设备的Wifi信息可以利用wifiManager模块，以下是一个详细的实现步骤：

1. 首先在index.ets文件中引入wifiManager模块：

   import wifiManager from '@ohos.wifiManager';
   

2. 然后需要在module.json5配置文件中声明获取WIFI信息的权限：

   "requestPermissions": [
     {
       "name": "ohos.permission.GET_WIFI_INFO"
     }
   ]
   

3. 使用wifiManager模块提供的方法来获取Wifi信息：

   • isWifiActive(): 检查Wifi是否已激活。
   • getLinkedInfo()：获取WLAN连接信息，通过Promise异步回调返回。
   • getIpInfo()：获取IP信息（同步方法）。

4. 实现代码如下：

   @Entry
   @Component
   struct Index {
     @State msgHistory: string = ''
     scroller: Scroller = new Scroller()
   
     build() {
       Row() {
         Column() {
           Text("Wifi信息获取示例")
             .fontSize(14)
             .fontWeight(FontWeight.Bold)
             .width('100%')
             .textAlign(TextAlign.Center)
             .padding(10)
   
           Flex({ justifyContent: FlexAlign.End, alignItems: ItemAlign.Center }) {
             Button("获取")
               .onClick(() => {
                 this.showWifiInfo()
               })
               .width(70)
               .fontSize(14)
               .flexGrow(0)
           }
           .width('100%')
           .padding(10)
   
           Scroll(this.scroller) {
             Text(this.msgHistory)
               .textAlign(TextAlign.Start)
               .padding(10)
               .width('100%')
               .backgroundColor(0xeeeeee)
           }
           .align(Alignment.Top)
           .backgroundColor(0xeeeeee)
           .height(300)
           .flexGrow(1)
           .scrollable(ScrollDirection.Vertical)
           .scrollBar(BarState.On)
           .scrollBarWidth(20)
         }
         .width('100%')
         .justifyContent(FlexAlign.Start)
         .height('100%')
       }
       .height('100%')
     }
   
     showWifiInfo() {
       if (wifiManager.isWifiActive()) {
         this.msgHistory += `Wifi可用\r\n`;
         this.showIPInfo()
         this.showLinkedInfo()
       } else {
         this.msgHistory += `Wifi不可用\r\n`;
       }
     }
   
     showIPInfo() {
       const ipInfo = wifiManager.getIpInfo();
       const ipAddr = getIpAddrFromNum(ipInfo.ipAddress);
   
       this.msgHistory += `IP地址: ${ipAddr}\r\n`;
   
       const gateAddr = getIpAddrFromNum(ipInfo.gateway);
       this.msgHistory += `网关地址: ${gateAddr}\r\n`;
   
       const maskAddr = getIpAddrFromNum(ipInfo.netmask);
       this.msgHistory += `子网掩码: ${maskAddr}\r\n`;
   
       const dnsAddr = getIpAddrFromNum(ipInfo.primaryDns);
       this.msgHistory += `DNS服务器: ${dnsAddr}\r\n`;
   
       const dhcpServer = getIpAddrFromNum(ipInfo.serverIp);
       this.msgHistory += `DHCP服务器: ${dhcpServer}\r\n`;
   
       this.msgHistory += `租用时长: ${ipInfo.leaseDuration}\r\n`;
     }
   
     showLinkedInfo() {
       wifiManager.getLinkedInfo()
         .then((linkedInfo) => {
           const len = linkedInfo.ssid.length;
           const ssid = linkedInfo.ssid.substring(1, len - 1);
   
           this.msgHistory += `SSID: ${ssid}\r\n`;
           this.msgHistory += `信号强度: ${linkedInfo.rssi}\r\n`;
           this.msgHistory += `网络频段: ${linkedInfo.band}\r\n`;
           this.msgHistory += `链接速度: ${linkedInfo.linkSpeed}\r\n`;
           this.msgHistory += `网络频率: ${linkedInfo.frequency}\r\n`;
           this.msgHistory += `MAC地址: ${linkedInfo.macAddress}\r\n`;
         });
     }
   }
   
   function getIpAddrFromNum(ipNum) {
     return (ipNum >>> 24) + '.' + (ipNum >> 16 & 0xFF) + '.' + (ipNum >> 8 & 0xFF) + '.' + (ipNum & 0xFF);
   }