Android Question how can i implement a library correctly

hi, it was sent to me by a company that produces "UsbToIrda Device", its own library to be able to use this device.
the problem is that i have no idea how to implement it given the files i have and the latter are

-AndroidManifest.xml
-evausblib-release.aar
-sample.java
-usb_device_filter.xml
-vmiusblib-release.aa

pls i need help...