Question

I have problem with android 4.0.3. I’m using the method below to get local IP:

public static String getLocalIpAddress() {
try {
    for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
        NetworkInterface intf = en.nextElement();
        for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
            InetAddress inetAddress = enumIpAddr.nextElement();
            if (!inetAddress.isLoopbackAddress()) {
                return inetAddress.getHostAddress().toString();
            }
        }
    }
} catch (SocketException ex) {
    ex.printStackTrace();
}
return null;
} 

It works great on android v2.1-2.3. But on emulator with android 4.0.3 it returns something like mac-address: fe80::fad0:bdff:fe4d:4871 Can anyone explain what’s happened?

Answer 1

To get only the IPv4 address, change

if (!inetAddress.isLoopbackAddress()) {

to

if (!inetAddress.isLoopbackAddress() && (inetAddress instanceof Inet4Address)) {