Attendance Application for android

I would like an android application created with AndroidStudio that takes students attendance based on scanning a barcode. Build an application to create events (university classes) and allows users (students) to register, after registering they receive a confirmation. The application has two different kinds of users. The first user is the professor who can view who has registered for the event. The professor is also provided with two barcodes which he can display at anytime during the class. In order for the student to be marked present he needs to scan both barcodes during the time of the class using the application, after they scanned both barcodes the application marks them as present. The professor can view who is present and who is absent during the class. If they only scanned one barcode the professor is notified and can mark them as absent or late.