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 di

Answer 1

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

Answer 2

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().

Answer 3

Try this

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

Answer 4

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.

Answer 5

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;}

Answer 6

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.