I'm working on an app that uses fingerprint as an authentication method. When the user tries to log-in the app displays a dialog and starts listening to the fingerprint sensor. The issue I'm having is that the sensor will be blocked by the system after 5 failed attempts, yet I can't find a way to determine when this happens. Nor can I find a way to determine when the sensor will be available again (usually this should happen after 30 seconds). Is there an API that I can use for this?
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Is this helpful? https://stackoverflow.com/questions/37859211 – Ian Rehwinkel Jul 09 '18 at 09:34
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Well, I haven't found a straightforward api to do this, however I noticed that when calling FingerprintManager.authenticate and passing an instance of FingerprintManager.AuthenticationCallback I will receive an onAuthenticationError callback with a onAuthenticationError of 7 when the fingerprint sensor has been temporarily blocked. So I guess it's just a matter of handling those events and modelling my app to follow what the system allows me to do.
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