Adyen POS integration with android
Access your customer area https://ca-test.adyen.com Go to -> Point of sale -> Release notes and libraries and download the lastest lib for Android.
Once you have downloaded the lib, you can import as libary module at your project. You will have a folder called AndroidLibraryDist is an android project. Don't put the jar individually, you need to put all the project folder as library because it needs some strings put on /res
Enjoy! If you have any question, feel free to contact with adyen support.