Checking Uri if they starts with "http://" or "https://"

Question

i am checking if a string starts with "http://" or "https://". I want to add "http://" at the beginning with they aren't. However,

String str = "www.stackoverflow.com"
str = "http://" + str;

would result in

str = "http//stackoverflow.com"

The ":" in the middle is missing. What should I do?

I can't understand how `:` is missing ? It should not. – Piyush Kukadiya Sep 23 '14 at 05:01 — Piyush Kukadiya, Sep 23 '14 at 05:01
are trying to strip www and add http(s) ? – Brajesh Kumar Sep 23 '14 at 05:18 — Brajesh Kumar, Sep 23 '14 at 05:18

score 2 · Answer 1 · edited May 23 '17 at 12:09

I used "android.webkit.URLUtil" class for checking Url. But it has its own limitation.

I detected that it allow spaces in urls.

// if url contains http://

 if(url.contains("http://")){
    // Validate URL
    if (!URLUtil.isValidUrl(url)) {

        Toast.makeText(getActivity(),"Invalid URL specified", Toast.LENGTH_SHORT).show();

        return;

         }else{ 

         // Your URL is Ready   

        }                       
         }else{// if url does not contains http://

        url = "http://" + url;  //add it to yur url 

         // Validate URL
        if (!URLUtil.isValidUrl(url)) { 
         Toast.makeText(getActivity(),"Invalid URL specified", Toast.LENGTH_SHORT).show();
             return;
            }else{ 
                    // Your link is ready   

                    }               
        }

URLUtil at Android developer

Stack Over flow Answer how to validate a URL / website name in EditText in Android?

score 2 · Answer 2 · answered Mar 15 '17 at 08:19

2

if (URLUtil.isNetworkUrl(requestUrl)) {
           // it means url start with http or https
        }else{
      // do relevant action
     }

answered Mar 15 '17 at 08:19

Gaurav patel

93
6

score -1 · Answer 3 · answered Sep 23 '14 at 04:59

-1

String str = "www.stackoverflow.com"
str = "http://" + str;

The above one is resulting as expected only i.e., "http://www.stackoverflow.com" Can you post your exact code what are you doing there.

answered Sep 23 '14 at 04:59

Supriya

1,078
1
8
16

Checking Uri if they starts with "http://" or "https://"

3 Answers3