Fingerprintmanager.ishardwaredetected() Throwing Java.lang.securityexception?

I have an App that offers the usage of fingerprints for authentication. Before asking if the user wants to enable it, I verify if it is available at all and it is done via: Fingerp

Solution 1:

Looks like a bug in the build process. A clean/rebuild makes the problem disappear

Solution 2:

The issue "automagically" stopped happening.

So far, I can only see those two affected users each one on a different version of our App (we publish every 2 weeks) and there was no change whatsoever in the App in regards to fingerprint permissions.

The last occurrence of the crash was on March 17th.

I see this as a Android/Play Store permissions glitch.

Solution 3:

I Fixed the Following issue by removing a build library from dependencies and added "lib" dir from Lollipins' github sources https://github.com/omadahealth/LolliPin/tree/master/lib

1. Remove "implementation('com.github.omadahealth:lollipin:2..." from build.gradle
2. Add "implementation project(':lib')" to build.gradle
3. Add "include ':lib'" to your settings.gradle

On your IDE(I am using android Studio) navigate to AppLockActivity.java line 147: Change to:

if (mFingerprintManager != null && mFingerprintManager.isHardwareDetected() && mFingerprintUiHelper.isFingerprintAuthAvailable())