How to use

EmojiTools

in

kotlinandroid.net.library

  @Override
  public void onClick(View v) {
    String inputText = mEt_input.getText().toString();
    mTv_before.setText(inputText);
    String filterEmoji = EmojiTools.filterEmoji(inputText);
    mTv_after.setText(filterEmoji);
  }
});

public static boolean containsEmoji(String str) {
  if (TextUtils.isEmpty(str)) {
    return false;
  }
  for (int i = 0; i < str.length(); i++) {
    int cp = str.codePointAt(i);
    if (isEmojiCharacter(cp)) {
      return true;
    }
  }
  return false;
}

public static String filterEmoji(String str) {
  if (!containsEmoji(str)) {
    return str;
  }else{
  }
  StringBuilder buf = null;
  int len = str.length();
  for (int i = 0; i < len; i++) {
    char codePoint = str.charAt(i);
    if (!isEmojiCharacter(codePoint)) {
      if (buf == null) {
        buf = new StringBuilder(str.length());
      }
      buf.append(codePoint);
    } else {
    }
  }
  if (buf == null) {
    return "";
  } else {
    return buf.toString();
  }
}

@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
  if (!resetText) {
    if (count >= 1) {//表情符号的字符长度最小为2
      if(count-before==20){
        input = s.toString().subSequence(cursorPos,  count);
      }else {
        input = s.toString().subSequence(cursorPos, cursorPos + count);
      }
      if (EmojiTools.containsEmoji(input.toString())) {
        resetText = true;
        //是表情符号就将文本还原为输入表情符号之前的内容
        Toast.makeText(mContext,"不支持输入该字符",Toast.LENGTH_SHORT).show();
        setText(inputAfterText);
        CharSequence text = getText();
        if (text instanceof Spannable) {
          Spannable spanText = (Spannable) text;
          Selection.setSelection(spanText, text.length());
        }
      }
    }
  } else {
    resetText = false;
  }
}