好，我设法通过使用这个lib来解决了这个问题

Ok i managed to solve this issue by using this lib

https://github.com/vdurmont/emoji-java

那里是一个isEmoji（string）

in there , there is a isEmoji(string)

   String currentTextStr = currentText.toString().substring(currentText.length() - 2);
   Log.e("emojicon",""+EmojiManager.isEmoji(currentTextStr));