关于系统信息的一些参数询问

// 获取netHandle对应网络的能力信息。能力信息包含了网络类型、网络具体能力等网络信息  
connection.getNetCapabilities(GlobalContext.getContext().netHandle, (err: BusinessError, data: connection.NetCapabilities) => {  
  console.log(JSON.stringify(err));  
  
  // 获取网络类型(bearerTypes)  
  let bearerTypes: Set<number> = new Set(data.bearerTypes);  
  let bearerTypesNum = Array.from(bearerTypes.values());  
  for (let item of bearerTypesNum) {  
    if (item == 0) {  
      // 蜂窝网  
      console.log(JSON.stringify("BEARER_CELLULAR"));  
    } else if (item == 1) {  
      // Wi-Fi网络  
      console.log(JSON.stringify("BEARER_WIFI"));  
    } else if (item == 3) {  
      // 以太网网络  
      console.log(JSON.stringify("BEARER_ETHERNET"));  
    }  
  }  
}