android splitting with space not working for this case. Why?

Question

I need to highlight and make url in the text clickable, dynamically.

For that, I am using the below method

private SpannableString addClickablePart(String string) {


        string = string.replaceAll("\\n"," \n ");

        string += " ";
        SpannableString ss = new SpannableString(string);
        String[] words = string.split(" ");
        for (final String word : words) {


            if (CommonUtilities.isValidURL(word)) {


                int lastIndex = 0;

                while(lastIndex != -1){

                    lastIndex = string.indexOf(word+" ",lastIndex);

                    if(lastIndex != -1){
                        ClickableSpan clickableSpan = new ClickableSpan() {
                            @Override
                            public void onClick(View textView) {
                                //use word here to make a decision

                                isRefreshingNecessary = false;

                                Intent mIntent = new Intent(ctx, UserWebsiteActivity.class);
                                mIntent.putExtra("website", word);
                                startActivity(mIntent);
                            }
                        };

                        ss.setSpan(clickableSpan, lastIndex, lastIndex + word.length(),
                                Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

                        lastIndex += word.length();
                    }
                }


            }
        }

        return ss;
    }

Its working for most of the cases. But, not working for all the cases as the below example.

The pricing information provided to you in your plan terms and conditions about these number ranges will no longer apply and will be replaced by this charging structure. See www.ee.co.uk/ukcalling for further information.

As, for the above case, when I split the whole string using

 String[] words = string.split(" ");

or

 String[] words = string.split("\\s+");

I got See www.ee.co.uk/ukcalling for as a single word. Instead, I need these 3 - See,www.ee.co.uk/ukcalling and for as 3 different words, not to be as grouped as a single word.

I am unable to understand whats wrong in the way of splitting with space. Please help me to know.

Answer 1

Replace all non visible white space characters.

 string = string.replaceAll("\\t", " ");
 string = string.replaceAll("\\xA0", " ");
 string = string.replaceAll("\\u1680", " ");
 string = string.replaceAll("\\u180e", " ");
 string = string.replaceAll("\\u2000", " ");
 string = string.replaceAll("\\u200a", " ");
 string = string.replaceAll("\\u202f", " ");
 string = string.replaceAll("\\u205f", " ");
 string = string.replaceAll("\\u3000", " ");

for java 8

string = string.replaceAll("(^\\h*)|(\\h*$)","");

check this how-to-trim-no-break-space-in-java