uribuilder.java

Uri builtUri = Uri.parse(BASE_URL).buildUpon()
        // add various params
        .appendQueryParameter(PARAM_QUERY, githubSearchQuery)
        .appendQueryParameter(PARAM_SORT, sortBy)
        // build the uri
        .build();

// Convert the Uri to a URL:
URL url = null;
try {
    url = new URL(builtUri.toString());
} catch (MalformedURLException e) {
    e.printStackTrace();
}

return url;