Android EditText禁止輸入特殊字符和空格,限制輸入字符個數

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/**
     * 禁止EditText輸入特殊字符和空格,限制輸入字符個數
     *
     * @param editText
     */
    public static void setEditTextInhibitInputSpeChat(EditText editText, int lenght) {

        InputFilter filter = new InputFilter() {
            @Override
            public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
                String regEx = "[`~!@#$%^&*()+=|{}':;',\\[\\].<>/?~！@#￥%……&*（）——+|{}【】‘；：”“’。，、？]";
                Pattern pattern = Pattern.compile(regEx);
                Matcher matcher = pattern.matcher(source.toString());
                if (matcher.find() || source.equals(" ")) return "";
                else return null;
            }
        };
        InputFilter.LengthFilter lengthFilter = new InputFilter.LengthFilter(lenght);
        editText.setFilters(new InputFilter[]{filter, lengthFilter});
    }