Problems at building app - MegaApiAndroid?

[ferro99luca]

Hi,
I'm having problems at building the example app for android. I think I must be missing something but I can't get what.
I followed the steps of the readme : cloned the repository, downloaded https://mega.nz/file/18B2URZb#DxEfqFuk1WhR4HCGLndVjbZUr8jt9TVEwMQSNweqbq8, added libs folder to app/src/main and added sdk folder in src/main/java/nz.mega. Putting it there I have no more import errors for classes like MegaNode (which I had before) but I still have errors for classes like MegaSet, MegaSetElement, MegaSetList, MegaSetElementList which I can't find in the downloaded commit 7e494c5 of the libmega.so.
Is it up-to-date? It seems like classes are missing or not seen.
It also cannot find static fields like MegaApi.PAYMENT_METHOD_STRIPE and other payment methods.

Hope to hear from you soon
Thanks