java/Kotlin/android 判断是否是url 的正则

//域名后缀，需要可以添加
   private static final String[] come = {
            "top", "com.cn", "com", "net", "cn", "cc", "gov", "cn", "hk"
    };

   public static boolean isWebUrl(String url) {
        StringBuilder sb = new StringBuilder();
        sb.append("(");
       for (String anExt : come) {
           sb.append(anExt);
           sb.append("|");
       }
        sb.deleteCharAt(sb.length() - 1);
        sb.append(")");
        String pattern = "((https?|s?ftp|irc[6s]?|git|afp|telnet|smb)://)?((\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3})|((www\\.|[a-zA-Z\\.\\-]+\\.)?[a-zA-Z0-9\\-]+\\." + sb.toString() + "(:[0-9]{1,5})?))((/[a-zA-Z0-9\\./,;\\?'\\+&%\\$#=~_\\-]*)|([^\\u4e00-\\u9fa5\\s0-9a-zA-Z\\./,;\\?'\\+&%\\$#=~_\\-]*))";
        return Pattern.compile(pattern).matcher(url).matches();
    }

Kotlin 代码

val a= arrayOf(  "top", "com.cn", "com", "net", "cn", "cc", "gov", "cn", "hk");

fun getCompleteUrl(text: String): Boolean {
    var sb = StringBuilder();
    sb.append("(");
    for (f in a) {
        sb.append(f);
        sb.append("|");
    }
    sb.deleteCharAt(sb.length - 1);
    sb.append(")");

    val p = Pattern.compile("((https?|s?ftp|irc[6s]?|git|afp|telnet|smb)://)?((\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3})|((www\\.|[a-zA-Z\\.\\-]+\\.)?[a-zA-Z0-9\\-]+\\." + sb.toString() + "(:[0-9]{1,5})?))((/[a-zA-Z0-9\\./,;\\?'\\+&%\\$#=~_\\-]*)|([^\\u4e00-\\u9fa5\\s0-9a-zA-Z\\./,;\\?'\\+&%\\$#=~_\\-]*))", Pattern.CASE_INSENSITIVE);
    val matcher = p.matcher(text);
    return matcher.matches()
}

能满足百分之九十的需求。