How to delete instantly SPACE from an edittext if a user presses the space?

Question

I have an edittext, and a textwatcher that watches if SPACE arrived or not. If its a SPACE I would like to delete that instantly. Or if its a space I want to make sure it do

Answer 1

My relatively simple solution for instant whitespace deletion without removing spannables (styles) in EditText:

1. Remove at start:

       @Override
   public void afterTextChanged(Editable s) {
       int i;
       for (i = 0; i < s.length() && Character.isWhitespace(s.charAt(i)); i++) { ; }
       s.replace(0, i, "");
   }
   

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Basically that's it, but you can also do:

2. Remove at start (without interrupting first input):

       @Override
   public void afterTextChanged(Editable s) {
       String text = s.toString();
       if(!text.trim().isEmpty()){
           int i;
           for (i = 0; i < s.length() && Character.isWhitespace(s.charAt(i)); i++) { ; }
           s.replace(0, i, "");
       }
   }
   

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3. Removing at start and end (allow 1 whitespace at end for convinient input):

       @Override
   public void afterTextChanged(Editable s) {
       int i;
       //remove at start
       for (i = 0; i < s.length() && Character.isWhitespace(s.charAt(i)); i++) { ; }
       s.replace(0, i, "");
       //remove at end, but allow one whitespace character
       for (i = s.length(); i > 1 && Character.isWhitespace(s.charAt(i-1)) && Character.isWhitespace(s.charAt(i-2)); i--) { ; }
       s.replace(i, s.length(), "");
   }