public ip가 아니라 192.168.1.100 같은 로컬의 ip를 얻어올 때 사용한다.
Internet 권한이 있어야 한다.
<uses-permission android:name="android.permission.INTERNET" />
private fun getIpAddress(): String { var result = "" NetworkInterface.getNetworkInterfaces().iterator().forEach { networkInterface -> networkInterface.inetAddresses.iterator().forEach { if (!it.isLoopbackAddress && isIPv4Address(it.hostAddress)) { result = it.hostAddress } } } return result } private fun isIPv4Address(address: String): Boolean { return if (address.isEmpty()) { false } else try { InetAddress.getByName(address) is Inet4Address } catch (exception: UnknownHostException) { false } }