Escribir en un EditText con formato de tarjeta de crédito

public void onTextChanged(CharSequence s, int start, int before, int count) {
        String input = s.toString();
        StringBuilder stringBuilder = new StringBuilder();
        if (input.length() >= 4) {
            if (input.length() == 4 || input.length() == 9 || input.length() == 14) {
                stringBuilder.append(input);
                stringBuilder.append(" ");
            } else {
                stringBuilder.append(input.substring(0, input.length() - 1));
            }
            editText.setText(stringBuilder.toString());
        }
    }