Get the word start and end position

Question

So I am trying to highlight the text view based on words but my code is not working properly what i want to do is "Hello world" both the word comes in different colour but for me only the hello part is getting highlighted

  SpannableString spannableString = new SpannableString(all_folder.get(position).getAudioChineseText());
            String spannableword = all_folder.get(position).getAudioChineseText();
            String[] splitStr = spannableword.split("\\s+");
            int end = 0;
            for (int i = 0; i < splitStr.length; i++) {
                end = splitStr[i].length() + i;
                int start=splitStr[i].length()+1;
                textcolor(holder.textChines, spannableString, i, end, all_folder.get(position).getSpeechResponse());

            }

the textcolour method is working fine but the position is not getting passed properly any idea what i am doing wrong as i need to pass the start and end position of the word

Answer 1

You can make use of String#lastIndexOf and String#indexOf to get the spanned index. Below is an example .

private SpannableString getSpanString(String text){
    SpannableString spannableString = new SpannableString(text);
    int startIndex1= 0;
    int endIndex1= text.indexOf(" ");
    int startIndex2= text.lastIndexOf(" ");
    int endIndex2 = text.length();
    spannableString.setSpan(new ForegroundColorSpan(Color.RED), startIndex1, endIndex1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    spannableString.setSpan(new ForegroundColorSpan(Color.BLUE), startIndex2, endIndex2, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    return spannableString;
}

Of course you need handle the edge cases here first . Like if String only have one word or its blank but the idea remain the same. Give it a try after adding the edge cases in the beginning of the method . Also you have to trim the string before use.