How to get response in Android Webview using secured HTTPS connection

Hi guys,

I'm new in android and i get stuck in some problems. i build a log-in page for my app and i want to get access to a HTTPS website using onReceivedHttpAuthRequest function, when i input the correct credential,its ok to access to the website. Now the problem is if i input wrong credential, i will get a blank page and didn't show any content or error message. So i wonder if there is a way that when i input the credential then app can check them and return some response so i can direct the page back to log-in page when input incorrect credential? cheers.

There are part of my code: