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Android - Cloud Recognition

I have downloaded the Cloud Recognition Sample and tried and the book cover and it worked. I need to use my own cloud Database to scan images and detect them, i tried changing theĀ "kAccesskey" and "kSecretKey" but it didn't work

should i modify or delete Book.java and BookOverlayView since am not using them anymore? and what other modifation should i do other than changing the keys?

I really need help, Thank you