網上有很多遮蔽特殊字元和表情的例子，用起來也很簡單，比如：

//判斷搜尋框內容是否包含特殊字元
                String limitEx = "[`[email protected]#$%^&*()+=|{}':;',\\[\\].<>/?~！@①#￥%……&*（）——+|{}【】‘；：”“’。，、？]";

                Pattern pattern = Pattern.compile(limitEx);
                Matcher m = pattern.matcher(str);

                if (m.find()) {
                    ToastUtil.show("不能輸入特殊字元");
                    return groupList;
                }
 

一般都是利用正則來判斷，但是特殊字元和表情特別多 要將這些特殊字元都用正則來判斷會顯得多而臃腫。

在Activirty中呼叫：

et.addTextWatcherListener(textWatcher);

           setProhiitEmoji(et);

後來在專案中看到了我們經理寫的頓時覺得高大上啊 

  public  void setProhibitEmoji(EditText et) {
        InputFilter[] filters = { getInputFilterProhibitEmoji() ,getInputFilterProhibitSP()};
        et.setFilters(filters);
    }

    public  InputFilter getInputFilterProhibitEmoji() {
        InputFilter filter = new InputFilter() {
            @Override
            public CharSequence filter(CharSequence source, int start, int end,
                                       Spanned dest, int dstart, int dend) {
                StringBuffer buffer = new StringBuffer();
                for (int i = start; i < end; i++) {
                    char codePoint = source.charAt(i);
                    if (!getIsEmoji(codePoint)) {
                        buffer.append(codePoint);
                    } else {
                        ToastUtil.show("群組暱稱不能含有第三方表情");
                        i++;
                        continue;
                    }
                }
                if (source instanceof Spanned) {
                    SpannableString sp = new SpannableString(buffer);
                    TextUtils.copySpansFrom((Spanned) source, start, end, null,
                            sp, 0);
                    return sp;
                } else {
                    return buffer;
                }
            }
        };
        return filter;
    }


    public  boolean getIsEmoji(char codePoint) {
        if ((codePoint == 0x0) || (codePoint == 0x9) || (codePoint == 0xA)
                || (codePoint == 0xD)
                || ((codePoint >= 0x20) && (codePoint <= 0xD7FF))
                || ((codePoint >= 0xE000) && (codePoint <= 0xFFFD))
                || ((codePoint >= 0x10000) && (codePoint <= 0x10FFFF)))
            return false;
        return true;
    }


    public  InputFilter getInputFilterProhibitSP() {
        InputFilter filter = new InputFilter() {
            @Override
            public CharSequence filter(CharSequence source, int start, int end,
                                       Spanned dest, int dstart, int dend) {
                StringBuffer buffer = new StringBuffer();
                for (int i = start; i < end; i++) {
                    char codePoint = source.charAt(i);
                    if (!getIsSP(codePoint)) {
                        buffer.append(codePoint);
                    } else {
                        ToastUtil.show("群組暱稱不能含有特殊字元");
                        i++;
                        continue;
                    }
                }
                if (source instanceof Spanned) {
                    SpannableString sp = new SpannableString(buffer);
                    TextUtils.copySpansFrom((Spanned) source, start, end, null,
                            sp, 0);
                    return sp;
                } else {
                    return buffer;
                }
            }
        };
        return filter;
    }
 

public boolean getIsSp(char codePoint){
if(Characcter.getType(codePoint)>Character.LETTER_NUMBER){

return true;

}

return false;

}

在Anctivity中呼叫：

llLin.setOnClickListener(onClick);
et.addTextChanagedListener(textWatcher);
setProhibitEmoji(et);