EditText 输入控制，用InputFilter过滤表情、特殊字符

  /**
     * 过滤掉常见特殊字符,常见的表情
     */
    public static void setEtFilter(EditText et) {
        if (et == null) {
            return;
        }
        //表情过滤器
        InputFilter emojiFilter = new InputFilter() {

            @Override
            public CharSequence filter(CharSequence source, int start, int end, Spanned dest,
                                       int dstart, int dend) {
                Pattern emoji = Pattern.compile(
                        "[\ud83c\udc00-\ud83c\udfff]|[\ud83d\udc00-\ud83d\udfff]|[\u2600-\u27ff]",
                        Pattern.UNICODE_CASE | Pattern.CASE_INSENSITIVE);
                Matcher emojiMatcher = emoji.matcher(source);
                if (emojiMatcher.find()) {
                    return "";
                }
                return null;
            }
        };
        //特殊字符过滤器
        InputFilter specialCharFilter = new InputFilter() {
            @Override
            public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
                String regexStr = "[`~!@#$%^&*()+=|{}':;',\[\].<>/?~！@#￥%……&*（）——+|{}【】‘；：”“’。，、？]";
                Pattern pattern = Pattern.compile(regexStr);
                Matcher matcher = pattern.matcher(source.toString());
                if (matcher.matches()) {
                    return "";
                } else {
                    return null;
                }

            }
        };

        et.setFilters(new InputFilter[]{emojiFilter});
    }  /**
     * 过滤掉常见特殊字符,常见的表情
     */
    public