IssueTracker

Forking from b/124066957

Thanks for the update, but I think there's bug in the canAuthenticate() method as it does not return proper error code on APIs < 23.

It returns BiometricManager.BIOMETRIC_ERROR_HW_UNAVAILABLE which according to comment is "The hardware is unavailable. Try again later."
Shouldn't it return BiometricManager.BIOMETRIC_ERROR_NO_HARDWARE in this case?


ERROR_HW_UNAVAILABLE generally means the device supports fingerprint, but the HAL is crashed (or things along those lines). We should return ERROR_NO_HW

    /**
     * The hardware is unavailable. Try again later.
     */
    int ERROR_HW_UNAVAILABLE = 1;

    /**
     * The device does not have a biometric sensor.
     */
    int ERROR_HW_NOT_PRESENT = 12;