Add http://www. in the text if not Exist

Question

How can I know that some text contain "http://www." I want to show domain in Web View. Domain name is written in TextView but there is no restriction to add prefix. If user didn't enter it I have to add and display URL in webview.

silwar · Accepted Answer · 2012-05-18T11:46:11.330

28

You can do like this

String url = textView.getText().toString();
if(!url.startsWith("www.")&& !url.startsWith("http://")){
  url = "www."+url;
}
if(!url.startsWith("http://")){
  url = "http://"+url;
}

You can use this url to display content in WebView

Hope this will solve your problem

edited May 18 '12 at 11:46

answered May 18 '12 at 10:06

silwar

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This approach is a bit simpler than using regex. Anyway, you should also handle the case where the user types `www.domain.com` – Sébastien May 18 '12 at 10:10
Hey Sebastien,please check answer again – silwar May 18 '12 at 10:12
Hm, this approach is buggy (you may end up with URLs like `www.http://www.domain.com`). Anyway, I think the poster will adjust the code according to his needs. – Sébastien May 18 '12 at 11:29
Hi Sebastian, please check improved answer – silwar May 18 '12 at 11:46
if(!byte_link.startsWith("www.") ){ if (!byte_link.startsWith("http")) { byte_link = "www." + byte_link; } } if(!byte_link.startsWith("http://")){ byte_link = "http"+byte_link; } should be corrected – Ashish Pardhiye Oct 25 '17 at 11:24

score 5 · Answer 2 · edited Jul 18 '20 at 07:52

just modified @silwar answer and add https :

 if(!url.startsWith("www.")&& !url.startsWith("http://") && !url.startsWith("https://")){
        url = "www."+url;
    }
    if(!url.startsWith("http://") && !url.startsWith("https://")){
        url = "http://"+url;
    }

But remember it that sometimes http:// create security exception in android so we should use https://.So for risk-free code, we have to do that like the last checking -

 if(!url.startsWith("http://") && !url.startsWith("https://")){
            url = "https://"+url;}

score 3 · Answer 3 · answered May 18 '12 at 09:58

3

The most efficient way of checking that the domain name is well formed and contains (or not) a prefix, is using a regular expression.

Check out Java Pattern to match regex in Android. It is worth it.

answered May 18 '12 at 09:58

Sébastien

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link is dead (404) – mitsest Jun 19 '17 at 10:26

Joey Roosing · Answer 4 · 2012-05-18T10:14:13.977

2

As Sebastien requested, regex is a good option. You can also get the text from the view, create an URI object

Uri uri = Uri.create(view.getText().toString());

then with uri.somemethod You should be able to get everything about an url you want to know. If the uri fails to create, you generate error messages cause something has gone wrong.

edited May 18 '12 at 10:14

answered May 18 '12 at 10:01

Joey Roosing

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score 1 · Answer 5 · answered May 18 '12 at 09:58

I would just get the text from the TextView and parse it via startsWith(). If this is false, just add it to the text and use setText() to reasign it.

You might also want to check for other expressions like only "www.". So take a closer look at contains().

score -2 · Answer 6 · edited Jul 15 '14 at 05:36

-2

Try this

String a = "http://";
webview.loadUrl(a + url.getText().toString());

edited Jul 15 '14 at 05:36

Abhijeet Kasurde

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answered Apr 18 '13 at 15:12

abhijeet kokane

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Add http://www. in the text if not Exist

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