Android Emoji表情、特殊字符过滤器

Emoji表情、特殊字符过滤（支持输出中文，英文，- 横线、_下划线）

将不支持的字符替换为空串

爱吃大蒜^_$￡€♀﹉#©️*-*-
爱吃大蒜_--

public class EmojiExcludeFilter implements InputFilter {

    @Override
    public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
        return filterNickName(source);
    }

    public String filterNickName(CharSequence source){
        String speChat = "[\ud83c\udc00-\ud83c\udfff]|[\ud83d\udc00-\ud83d\udfff]|[\u2600-\u27ff]|[^\u4e00-\u9fa5a-zA-Z0-9-_]";
        Pattern pattern = Pattern.compile(speChat,Pattern.UNICODE_CASE | Pattern.CASE_INSENSITIVE);
        Matcher matcher = pattern.matcher(source.toString());
        if (matcher.find()) {
            return matcher.replaceAll("");
        }
        return null;
    }

}

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