尝试验证特定于个人的url，然后在Android中打开登录屏幕

我正在尝试制作一个应用程序，让用户连接到他们的特定网站，然后可以从中访问数据。第一页要求他们输入url。然后我解析这个，并需要验证url的存在，以便将它们移动到登录屏幕。我该怎么做呢？我正在尝试HttpURLConnections，但运气不太好。想法？

尝试以下代码：

try {

int status = 0;
try {
    HttpURLConnection httpConnection = (HttpURLConnection) new URL(
    "http://www.google.com").openConnection();
            httpConnection.setRequestMethod("HEAD");
            Log.e("StatusCode",httpConnection.getResponseCode());

            if ((httpConnection.getResponseCode() == 200)||(httpConnection.getResponseCode() == 302)) {
                status = 1;
            }

        } catch (Exception ex) {}
        if (status == 1) {
            Log.e("WebSite","Found");
        } else {
            Log.e("WebSite","NotFound");
        }

} catch (Exception ex1) {
Log.e("Error",ex1.getMessage().toString());
}