Android EditText change colour of a single word while typing (dynamically)

I have an edit text while typing inside edit text if the word starts with # that particular words color should change ,

i have implemented textwatcher and found that if text starts with # but do not know how to update the color dynamically ,

Have tried SpannableStringBuilder ssb = new SpannableStringBuilder(yourText) But its static , could anyone help me for dynamic implementation

Here is my code

myEditTxt.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence text, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence text, int start, int before, int count) {

           if (text.charAt(start) == '#') {
               //here i needs to update the typing text color
            }
        }

        @Override
        public void afterTextChanged(Editable s) {

        }
    });

Finally found an answer and works as expected .

 private int intCount = 0, initialStringLength = 0;
private String strText = "";

on text changed

 @Override
        public void onTextChanged(CharSequence text, int start, int before, int count) {

            String strET = editText.getText().toString();
            String[] str = strET.split(" ");
            int cnt = 0;
            if (text.length() != initialStringLength && text.length() != 0) {
                if (!strET.substring(strET.length() - 1).equals(" ")) {
                    initialStringLength = text.length();
                    cnt = intCount;
                    for (int i = 0; i < str.length; i++)
                        if (str[i].charAt(0) == '#')
                            strText = strText + " " + "<font color='#EE0000'>" + str[i] + "</font>";
                        else
                            strText = strText + " " + str[i];
                }
                if (intCount == cnt) {
                    intCount = str.length;
                    editText.setText(Html.fromHtml(strText));
                    editText.setSelection(textShareMemories.getText().toString().length());
                }
            } else {
                strText = "";
            }

        }