onFailure is called for no reason

[hatpick]

I'm using reprint on a phone with api 23 but no fingerprint sensor. onFailure gets called immediately.

[ajalt]

That's by design. What would you expect to happen?

[hatpick]

Nothing should happen, when you don't have a sensor but you have the api available on your phone you haven't tried your fingers for authentication, so no failure, no authentication should happen.

[ajalt]

No authentication does happen. I would be a terrible design to just never call any listener callbacks. If the user hasn't registered a fingerprint, onFailure is called with an error code of NO_FINGERPRINTS_REGISTERED so that your UI can inform the user. You can check Reprint.hasFingerprintRegistered() if you want to check for that situation before calling Reprint.authenticate()