mEditTextView.addTextChangedListener(new TextWatcher() {

      @Override
      public void afterTextChanged(Editable editable) {
        int index = contentText.getSelectionStart() - 1;
        if (index > 0) {
          if (isEmojiCharacter(editable.charAt(index))) {
            Editable edit = contentText.getText();
            edit.delete(index, index + 1);
          }
        }
      }

      @Override
      public void beforeTextChanged(CharSequence s, int start, int count, int after) {

      }

      @Override
      public void onTextChanged(CharSequence s, int start, int before, int count) {

      }
    });

   private static boolean isEmojiCharacter(char codePoint) {
     return !((codePoint == 0x0) || (codePoint == 0x9) || (codePoint == 0xA) || (codePoint == 0xD) || ((codePoint >= 0x20) && odePoint <= 0xD7FF))|| ((codePoint >= 0xE000) && (codePoint <= 0xFFFD)) || ((codePoint >= 0x10000) && (codePoint <= 0x10FFFF)));
   }