[local_auth] [android] Non-biometrics authentication gives NotAvailable on Android 10 about flutter

[ebadta81]

This solution resolved my problem

Could you please put it in the documentation?

[huycozy]

I think this should be fixed on #111025 but I see you are already on the latest package version local_auth_android: 1.0.38.

I checked this again using Android emulator Pixel 3, Android 10 but couldn't reproduce the issue. I see you have two Android 10 devices (from flutter doctor output). Could you confirm this occurs on both your physical device and emulator?

[ebadta81]

In emulator, it does not occurs, because it has fingerprint biometric sensor. Also my zebra phone have android 10 build number: 10-16-10.00-QG-U00-STD-HEL-04, maybe it is not the same in emulator.

It is pretty clear to me, this is an android bug they already fixed with this jetpack package.

Fixed an issue where BiometricManager.canAuthenticate(int) would sometimes return the wrong status code for a device with a fingerprint sensor on Android 10 (API level 29). ([I72420](https://android-review.googlesource.com/#/q/I72420b5721ea41bae8b037f43ab8fbd49250ebf2), [b/176921662](https://issuetracker.google.com/issues/176921662))
Fixed an issue where BiometricManager.canAuthenticate(int) would return the wrong status code for a device with no biometric hardware and no enrolled PIN, pattern, or password on Android 10 (API level 29) and prior SDK versions. ([I79b7d](https://android-review.googlesource.com/#/q/I79b7dbf009c44582c4693be5d27dd850777ab4d1), [b/174505824](https://issuetracker.google.com/issues/174505824))

[huycozy]

Thanks for checking emulator and quoting the related change of version androidx.biometric:biometric:1.2.0-alpha02. I don't have such an Android 10 physical device to check this but I think this is a valid issue. Perhaps we can just roll into new package version once biometric dependency releases stable version. Labeling this for other's thoughts.

[reidbaker]

Current status is we think that the issue is with the underlying biometrics androidx implementation. We are working on figuring out when their next stable release will be and leaving this bug open to track updating the dependency.