Android API-23: InetAddressUtils replacement

Question

Switching to Android Marshmallow API, I was using org.apache.http.conn.util.InetAddressUtils for InetAddressUtils.isIPv4Address(ipAddress) in a code to list all IPs from a device.

As part of the API-23 changes, the InetAddressUtils class is now gone.

How can I replace the below code now?

public static String ipAddress() {
    try {
        for (final Enumeration<NetworkInterface> enumerationNetworkInterface = NetworkInterface.getNetworkInterfaces(); enumerationNetworkInterface.hasMoreElements();) {
            final NetworkInterface networkInterface = enumerationNetworkInterface.nextElement();
            for (Enumeration<InetAddress> enumerationInetAddress = networkInterface.getInetAddresses(); enumerationInetAddress.hasMoreElements();) {
                final InetAddress inetAddress = enumerationInetAddress.nextElement();
                final String ipAddress = inetAddress.getHostAddress();
                if (! inetAddress.isLoopbackAddress() && InetAddressUtils.isIPv4Address(ipAddress)) {
                    return ipAddress;
                }
            }
        }
        return null;
    }
    catch (final Exception e) {
        LogHelper.wtf(null, e);
        return null;
    }
}

What are you trying to do? If you just walt to know if an IP is IPv6 or not you can check for `inetAddress instancof Inet6Address` or `inetAddress instancof Inet4Address`. — rekire, Aug 22 '15 at 20:20
I'm trying to replace `InetAddressUtils.isIPv4Address(ipAddress)` with a code that works with Android API-23 — shkschneider, Aug 24 '15 at 08:46
Like its names says: returns if the ip address is IPv4 or not https://hc.apache.org/httpcomponents-client-ga/httpclient/apidocs/org/apache/http/conn/util/InetAddressUtils.html#isIPv4Address(java.lang.String) This method is now unavailable in Android API-23. I just want to replace it but I don't know any alternatives yet. — shkschneider, Aug 24 '15 at 09:00

rekire · Accepted Answer · 2020-11-19T07:31:38.213

25

Like I interprete from the comments you can replace that function with this comparison:

inetAddress instanceof Inet4Address

so your code would end in:

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

Update from 2020
Keep in mind that your user can also have IPv6 enabled. In that case you need to check for Inet6Address too.

edited Nov 19 '20 at 07:31

answered Aug 24 '15 at 09:02

rekire

47,260
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1

Well, indeed `InetAddressUtils` is gone from Android's API-23, but not `Inet4Address`. Thanks for the workaround. – shkschneider Aug 24 '15 at 09:29
Or you can also do: Inet4Address.class.isInstance(inetAddress) – Bostone Dec 03 '15 at 22:35
@maňish: import java.net.Inet4Address – cesargastonec May 12 '17 at 23:54

score 5 · Answer 2 · answered Mar 16 '18 at 06:22

5

Add below to your build.gradle(Module:app) file,

android { useLibrary 'org.apache.http.legacy' }

answered Mar 16 '18 at 06:22

dgamer

155
2
3

cyanide · Answer 3 · 2015-08-30T00:28:01.760

I couldn't find something better than converting to Inet4Address or Inet6Address

public boolean isValidIp4Address(final String hostName) {
      try {
         return Inet4Address.getByName(hostName) != null;
     } catch (UnknownHostException ex) {
         return false;
     } 
}

public boolean isValidIp6Address(final String hostName) {
      try {
         return Inet6Address.getByName(hostName) != null;
     } catch (UnknownHostException ex) {
         return false;
     } 
}

Note, the getHostByName actually does the lookup, which isn't always desirable.

Or, you can get source of InetAddessUtils, which unlike getByName(), doesn't do the lookup, but accepts only dotted addresses. The code is really tiny. It uses regexp classes which are supported by Android. Just remove Immutable annotation which isn't really important, and it will compile!

`getByName()` seems to me like inherited from `InetAddress`. — shkschneider, Aug 31 '15 at 08:30

score 3 · Answer 4 · answered Sep 29 '16 at 05:32

3

To use this library in SDK 23 add following line in project's build.gradle file:

useLibrary 'org.apache.http.legacy'

answered Sep 29 '16 at 05:32

Tarun

748
1
13
30

That would also make the legacy code work. However I was looking for a replacement and not having to depend on an entire legacy for this function. Other might be looking for this solution though, upvoted. – shkschneider Apr 10 '18 at 12:15

score 1 · Answer 5 · answered Apr 27 '16 at 14:44

1

Using try catch as logic is horrible practice and should only be done if totally unavoidable..

Use something like this instead:

if (inetAddress instanceof Inet4Address){
    //do something
}

answered Apr 27 '16 at 14:44

Daniel Harvey

43
6

Android API-23: InetAddressUtils replacement

5 Answers5

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