"Copy google-play-services.jar from <android sdk>\extras\google\google_play_services\libproject\google-play-services_lib\libs to the additional libraries folder. Make sure to repeat this step whenever you update Google Play Services."
I installed Google Play Service as you can see on immagine1.jpg, but I havent "libproject" folder into "google_play_services" folder as you can see on immagine2.jpg and google-play-services.jar isn't in <android sdk> folder or his subfolders.
Do not use AdMob library. It no longer works.
You should use FirebaseAdMob instead.
1. Register your app and get an ad unit id (PublisherId).
2. Download and copy google-play-services.jar as explained in steps 1 and 2 here: https://www.b4x.com/android/forum/threads/45843/#content
3. Add the following attribute to the project (change the path based on your installation):
Point 2 send me on this tutorial
How can I exec point 2?
1. Register your app and get an ad unit id (PublisherId).
2. Download and copy google-play-services.jar as explained in steps 1 and 2 here: https://www.b4x.com/android/forum/threads/45843/#content
3. Add the following attribute to the project (change the path based on your installation):