Android Utililty Methods String to URL Convert

String pattern = "https?:\\/\\/(?:[0-9A-Z-]+\\.)?(?:youtu\\.be\\/|youtube\\.com\\S*[^\\w\\-\\s])([\\w\\-]{11})(?=[^\\w\\-]|$)(?![?=&+%\\w]*(?:['\"][^<>]*>|<\\/a>))[?=&+%\\w]*";
Pattern compiledPattern = Pattern.compile(pattern,
        Pattern.CASE_INSENSITIVE);
Matcher matcher = compiledPattern.matcher(url);
if (matcher.find()) {
    return matcher.group(1);
return null;
...

if (url == null) {
    return null;
if (url.startsWith("http://") || url.startsWith("https://")) {
    return url;
} else {
    return "http://" + url;

String strAllParam = null;
String[] arrSplit = null;
strURL = strURL.trim().toLowerCase();
arrSplit = strURL.split("[?]");
if (strURL.length() > 1) {
    if (arrSplit.length > 1) {
        if (arrSplit[1] != null) {
            strAllParam = arrSplit[1];
...

if (isBlank(url))
    return false;
String strPattern = "^(http|https)://(.+)/(.+)([.]+)(.+)$";
Pattern p = Pattern.compile(strPattern);
Matcher m = p.matcher(url);
return m.matches();

if (imageUrl == null || imageUrl.isEmpty()
        || !imageUrl.contains("http://")) {
    return null;
int start = imageUrl.lastIndexOf('/');
if (start == -1) {
    return null;
int end = imageUrl.lastIndexOf('.');
if (end == -1) {
    return null;
if (end <= start + 1) {
    return null;
return imageUrl.substring(start + 1, end);

List<String> urls = new ArrayList<String>();
Matcher matcher = urlPattern.matcher(text);
while (matcher.find()) {
    urls.add(matcher.group());
return urls;

if (!isCaseSensitve)
    str = str.toLowerCase(defloc);
String regex = "^((https|http|ftp|rtsp|mms)?://)"
        + "?(([0-9a-z_!~*'().&=+$%-]+: )?[0-9a-z_!~*'().&=+$%-]+@)?" 
        + "(([0-9]{1,3}\\.){3}[0-9]{1,3}" 
        + "|" 
        + "([0-9a-z_!~*'()-]+\\.)*" 
        + "([0-9a-z][0-9a-z-]{0,61})?[0-9a-z]\\." 
...