【Android】IPアドレス取得

<uses-permission android:name="android.permission.INTERNET" />

/**
 * IPアドレス取得メソッド
 */
class IPAddress {
    fun getIPAddress():String{
        var text = "";
        try{
            val interfaces = NetworkInterface.getNetworkInterfaces();
            if(interfaces == null){
                text += "IPアドレス取得できませんでした。" + System.lineSeparator()
                return text;
            }
            while(interfaces.hasMoreElements()){
                val network = interfaces.nextElement()
                val addresses = network.inetAddresses

                while(addresses.hasMoreElements()){
                    val address = addresses.nextElement()
                    text += address.hostAddress + System.lineSeparator()

                }
            }
        }catch (e : SocketException){
            e.printStackTrace()
        }
        return text;
    }
}