public static String changeLang(final String url, final String lang) {
final String[] hashSplitted = url.split("#");
final String hash = hashSplitted.length > 1 ? hashSplitted[1] : "";
String query = hashSplitted.length >= 1 ? hashSplitted[0] : (url.equals("#") ? "" : url);
query = query.startsWith("?") ? query.substring(1) : query;
final String[] params = query.split("&");
final Url changedUrl = new Url("");
if (!query.contains("locale")) {
addLangParam(lang, changedUrl);
}
for (final String param : params) {
if (TextUtils.notEmpty(param)) {
final String[] pair = param.split("=");
if (pair[0].equals("locale")) {
addLangParam(lang, changedUrl);
} else {
changedUrl.add(new UrlParam(pair[0], pair[1]));
}
}
}
return changedUrl.toString() + (url.contains("#") ? "#" + hash : "");
}
private static void addLangParam(final String lang, final Url changedUrl) {
changedUrl.add(new UrlParam("locale", lang));
}