Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package eu.codebits.plasmas.util; import android.annotation.SuppressLint; import java.net.InetAddress; import java.net.NetworkInterface; import java.net.SocketException; import java.util.Collections; import java.util.List; import org.apache.http.conn.util.InetAddressUtils; /** * * @author rcarmo */ public class NetworkInterfaces { /** * * @param interfaceName * @return */ public static String getMACAddress(String interfaceName) { try { List<NetworkInterface> interfaces = Collections.list(NetworkInterface.getNetworkInterfaces()); for (NetworkInterface intf : interfaces) { if (interfaceName != null) { if (!intf.getName().equalsIgnoreCase(interfaceName)) continue; } byte[] mac = intf.getHardwareAddress(); if (mac == null) continue;//return ""; StringBuilder buf = new StringBuilder(); for (int idx = 0; idx < mac.length; idx++) buf.append(String.format("%02X:", mac[idx])); if (buf.length() > 0) buf.deleteCharAt(buf.length() - 1); return buf.toString(); } } catch (SocketException ex) { } return ""; } /** * @param interfaceName eth0, wlan0 or NULL=use first interface * @param useIPv4 * @return address or empty string */ @SuppressLint("DefaultLocale") public static String getIPAddress(String interfaceName, boolean useIPv4) { try { List<NetworkInterface> interfaces = Collections.list(NetworkInterface.getNetworkInterfaces()); for (NetworkInterface intf : interfaces) { if (interfaceName != null) { if (!intf.getName().equalsIgnoreCase(interfaceName)) continue; } List<InetAddress> addrs = Collections.list(intf.getInetAddresses()); for (InetAddress addr : addrs) { if (!addr.isLoopbackAddress()) { String sAddr = addr.getHostAddress().toUpperCase(); boolean isIPv4 = InetAddressUtils.isIPv4Address(sAddr); if (useIPv4) { if (isIPv4) return sAddr; } else { if (!isIPv4) { int delim = sAddr.indexOf('%'); // drop ip6 port suffix return delim < 0 ? sAddr : sAddr.substring(0, delim); } } } } } } catch (SocketException ex) { } return ""; } }