Escribir en un EditText con formato de tarjeta de crédito

public static void cardFormat(final EditText card) {
        card.addTextChangedListener(new TextWatcher() {
            private static final char space = ' ';

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {}

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

            @Override
            public void afterTextChanged(Editable s) {
                if (s.length() > 0 && (s.length() % 5) == 0) {
                    final char c = s.charAt(s.length() - 1);
                    if (space == c) {
                        s.delete(s.length() - 1, s.length());
                    }
                }
                if (s.length() > 0 && (s.length() % 5) == 0) {
                    char c = s.charAt(s.length() - 1);
                    if (Character.isDigit(c) && TextUtils.split(s.toString(), String.value