EmojiProvider.java 文件源码

public Spannable emojify(CharSequence text, Callback callback) {
  Matcher                matches = EMOJI_RANGE.matcher(text);
  SpannableStringBuilder builder = new SpannableStringBuilder(text);

  while (matches.find()) {
    int codePoint = matches.group().codePointAt(0);
    Drawable drawable = getEmojiDrawable(codePoint, EMOJI_SMALL);
    if (drawable != null) {
      builder.setSpan(new InvalidatingDrawableSpan(drawable, callback), matches.start(), matches.end(),
                      Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    }
  }

  return builder;
}