如何判断当前网络是否是Wi-Fi环境？

static async hasNetWiFi(): Promise<boolean> {
  let net = await connection.getDefaultNet();
  let netCapabilities = await connection.getNetCapabilities(net);
  let networkCap = netCapabilities.networkCap;
  if (networkCap) { //判断是否具有NET_CAPABILITY_NOT_METERED属性，如果具有NET_CAPABILITY_NOT_METERED，说明是普通Wi-Fi，否则是移动流量热点网络。
    return networkCap.indexOf(connection.NetCap.NET_CAPABILITY_NOT_METERED) >= 0
  }
  return false;
}