Android : Java - WebView What event handles (watches) URL changes - Android

I have a very general question that I can't seem to find a good solution.

The app does a login to a web application using WebView. Once in webview, webview appears to handle everything for you as it should based on the user's clicks. However I need to review on each event if the URL changes to a specific logout URL. When the person logs out on the web application within the webview, I want to return to the app itself. I do not want the webview to stay as the active view. I have tried WebViewClient.shouldOverrideUrlLoading and View.OnTouchListsner.