Android Fingerprints: hasEnrolledFingerprints triggers exception on some Samsungs

Question

I\'m seeing a lot of exceptions in our production app when enabling fingerprints coming from Android 6 users, which I cannot reproduce on any of my local Samsung devices. The st

Answer 1

I came across the same problem on a Samsung Galaxy S6, running Android 6.0.1

The Problem was caused by calling

fingerprintManager.hasEnrolledFingerprints()

I fixed it by adding a call to check for hardware before:

fingerprintManager.isHardwareDetected()
    && mFingerprintManager.hasEnrolledFingerprints()

Checking for fingerprints without the hardware available seems to cause this exception on some devices.