I received an email from google regarding the collapsible banner.
Do you already support this ad format?
Here's the simple code they sent as an example, I couldn't adapt it to B4A:
Bundle extras = new Bundle();
extras.putString("collapsible", "top");
AdRequest adRequest = new AdRequest.Builder()
.addNetworkExtrasBundle(AdMobAdapter.class, extras)
.build();
adView.loadAd(adRequest);
Thanks, Erel. It worked, but I get the expanded banner only from top to bottom.
If I put the retracted (normal) banner in the bottom of the screen, the expanded banner is open off the screen.
The third screen is show if I put the banner in 50%y and not 100%y (like the 2 first screens):