Get domain name from URL in Java/Android

Question

In my app, I need to get the favicon.ico from a URL. (eg. "http://google.com/favicon.ico"). Users can input all kinds of URLs, and I need only the domain name.

Examples:

http://drive.google.com/bla/bla/bla -> drive.google.com

www.facebook.com/lol -> www.facebook.com

192.168.0.1 -> 192.168.0.1 (but not really necessary)

Does anyone have a method to get this? Thanks!

can't you wrap it in a Url object and use the getHost() method? — peshkira, Apr 16 '14 at 20:36

score 40 · Accepted Answer · edited Jul 30 '16 at 16:26

40

Try using something like

String u = "www.facebook.com/lol";
URL url = new URL(u);
String host = url.getHost(); // should be www.facebook.com

If you need different parts of the Url look at the documentation and the other getters here: http://developer.android.com/reference/java/net/URL.html

edited Jul 30 '16 at 16:26

John Deverall

5,954
3
27
37

answered Apr 16 '14 at 20:39

peshkira

6,069
1
33
46

From where should I import Url? – hansottowirtz Apr 16 '14 at 20:46
look at doc ;) java.net.URL – peshkira Apr 17 '14 at 08:34
This will give you malformed exception. Soln : http://stackoverflow.com/a/40405173/1137624 – cegprakash Nov 03 '16 at 15:19
@cegprakash not if you catch it. Your proposed solution won't match many valid top level domains. – peshkira Nov 03 '16 at 15:24
@cegprakash Where does this statistic come from? Why would a regular expression be the only feasible solution, if you do not catch the majority of TLDs? – peshkira Nov 03 '16 at 15:59
I tried some thousands of URLs. I can catch any TLD just by updating my regex. – cegprakash Nov 03 '16 at 16:13
1

"Won't match man y valid top level domains..." Can someone please explain this or give an example? What domain name won't work with the code in this answer? And where does the 50% number come from for malformed URL's? – David Rector Oct 08 '18 at 20:55

Get domain name from URL in Java/Android

1 Answers1