#鸿蒙通关秘籍# 如何在鸿蒙系统中利用wifiManager模块获取完整的Wifi信息展示？

import wifiManager from '@ohos.wifiManager';
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"requestPermissions": [
  {
    "name": "ohos.permission.GET_WIFI_INFO"
  }
]
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@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);
}
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