Hi Margret!
Thanks for your interest in my problem. There is no call to that sub, as the webview does not change its url. It is like google's adsense do not manage to bubble out the url redirection from their ad banner into the app4basic webview (I don't know the exact way that adsense does the trick, but I suspect that it is thru javascript) and thus the ad webpage is opened inside the iframe box where the ad itself was displayed.
Also I noticed that this is a random behavior. I compile my app, try it, and SOMETIMES the add behaves normally and when clicked, it opens the ad webpage in the webview. I recompile my app, and it just goes with the weird behavior I am telling you about opening the ads webpage inside their ad area. Also I noticed that apk size each time I recompile is changing. As I said, Weird.
Problem is that "playing" with adsense banners -specially if they are from your own adsense account- is not at all a nice thing to do. So further testing this apparent bug from basic4android webview is somewhat a no-go.
I should also say that my adsense panel shows that the banner was shown like 100 times, clicked 6 times (my tests mainly) and they are already sensing that something is wrong, as click payment is U$S 0.00 ... hence the need not to keep testing.
I will use a third party url, to do some more tests ... probably from a high traffic website, so I wont hurt them.
I will keep posting my results. The app code itself it is just "open this url in the webview" and nothing more, so I dont feel it is necessary to even post it in here. Ah I also force full screen, hide title bar, and force landscape mode.