public static boolean isEmote(String content) {
  Pattern pattern = Pattern.compile(NOT_EMOJI);
  Matcher matcher = pattern.matcher(content);
  return matcher.find();
 }

text.addTextChangedListener(new TextWatcher() {
   @Override
   public void beforeTextChanged(CharSequence s, int start, int count, int after) {
   }
   @Override
   public void onTextChanged(CharSequence s, int start, int before, int count) {
   }
   //可以在这个方法里面操作完成
   @Override
   public void afterTextChanged(Editable s) {
    //如果为true
    if (isEmote(s.toString())) {
     //删除输入的表情，开始位置和结束位置，表情符号长度为2个，所以减2
     s.delete(s.length() - 2, s.length());
    }else {
     textView.setText("(" + s.length() + "/" + "200" + ")");
    }
   }
  });