表情是一些特定的組合,如f000,f001等

/**
     * 顯示內容
     * @param msg
     * @return
     */
    private SpannableString convertContent(String msg){
        String emoji;
        String regex = "f0[0-9]{2}|f10[0-6]";
        Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(msg);
        SpannableString spannableString = new
 
 SpannableString(msg);
        int totalLen = 0;
        String leftString = msg.substring(0, msg.length());
        //找到一個匹配的，就擷取
        while(matcher.find(0)){
            emoji = matcher.group();
            if(emoji.length() > 0){
                //找到表情在這段字串的位置
                int len = leftString.indexOf(emoji)+emoji.length();
                //記錄總長度
 

                totalLen = totalLen + len;
                Log.e("ZYL", "emoji:"+emoji+" ,len:"+len +", totalLen: "+totalLen);
                //轉化為表情
                getSpannableString(spannableString, emoji,totalLen);
                //剩下字串作為下一段字串
                leftString = msg.substring(totalLen, msg.length());
                //重置matcher
 

                matcher.reset(leftString);
            }else{
                break;
            }
        }
        return spannableString;
    }


    private SpannableString getSpannableString(SpannableString spannableString,String emoji,int totalLen){
        try {
            Field field = R.drawable.class.getDeclaredField(emoji);
            int imageId = field.getInt(R.drawable.class);
            //根據圖片的id得到bitmap
            Bitmap bmp = BitmapFactory.decodeResource(context.getResources(), imageId);
            //得到ImageSpan
            ImageSpan imageSpan = new ImageSpan(context,bmp);
            //使表情的text顯示為表情圖片
            spannableString.setSpan(imageSpan, totalLen-emoji.length(), totalLen,
                    SpannableString.SPAN_EXCLUSIVE_EXCLUSIVE);
            return spannableString;
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        }
        return null;
    }