android设备无线、有线网络下获取MAC地址

public static String getLocalMacIdFromIp(){
String strMacAddr = "";
try {
InetAddress ip = getLocalInetAddress();

byte[] b = NetworkInterface.getByInetAddress(ip)
.getHardwareAddress();
StringBuffer buffer = new StringBuffer();
for (int i = 0; i < b.length; i++) {
if (i != 0) {
buffer.append(':');
}

String str = Integer.toHexString(b[i]&0xFF);
buffer.append(str.length() == 1 ? 0 + str : str);
}
strMacAddr = buffer.toString().toLowerCase();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return strMacAddr;
}

/**
* 获取设备本地IP
*/
protected static InetAddress getLocalInetAddress() {
InetAddress ip = null;
try {
//列举
Enumeration en_netInterface = NetworkInterface.getNetworkInterfaces();
while (en_netInterface.hasMoreElements()) {//是否还有元素
NetworkInterface ni = (NetworkInterface) en_netInterface.nextElement();//得到下一个元素
Enumeration en_ip = ni.getInetAddresses();//得到一个ip地址的列举
while (en_ip.hasMoreElements()) {
ip = (InetAddress) en_ip.nextElement();
if (!ip.isLoopbackAddress() && ip.getHostAddress().indexOf(":") == -1)
break;
else
ip = null;
}

if (ip != null) {
break;
}
}
} catch (SocketException e) {

e.printStackTrace();
}
return ip;
}