Android指纹：hasEnrolledFingerprints在某些三星手机上触发异常 [英] Android Fingerprints: hasEnrolledFingerprints triggers exception on some Samsungs

问题描述

当启用来自Android 6用户的指纹时，我们的生产应用程序中看到很多例外，我无法在任何本地三星设备上复制这些指纹。堆栈跟踪为：

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 stacktrace is:

Message: SecurityException: Permission Denial: getCurrentUser() from pid=24365, uid=10229 requires android.permission.INTERACT_ACROSS_USERS
android.os.Parcel.readException in Parcel.java::1620
android.os.Parcel.readException in Parcel.java::1573
android.hardware.fingerprint.IFingerprintService$Stub$Proxy.hasEnrolledFingerprints in IFingerprintService.java::503
android.hardware.fingerprint.FingerprintManager.hasEnrolledFingerprints in FingerprintManager.java::762
android.support.v4.hardware.fingerprint.FingerprintManagerCompatApi23.a in SourceFile::39
android.support.v4.hardware.fingerprint.FingerprintManagerCompat$Api23FingerprintManagerCompatImpl.a in SourceFile::239
android.support.v4.hardware.fingerprint.FingerprintManagerCompat.a in SourceFile::66

这只是使用标准的 FingerprintManagerCompat 类从支持库，检查工作c

This is just using the standard FingerprintManagerCompat class from the support library, and the check works correctly on other devices.

我不想向我的应用添加此权限-似乎与指纹无关。

I don't want to add this permission to my app - it seems to have nothing to do with fingerprints.

有人遇到过类似的事情吗？

Has anyone encountered anything like this?

推荐答案

我在三星Galaxy上遇到了同样的问题S6，运行Android 6.0.1

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

问题是由于调用

fingerprintManager.hasEnrolledFingerprints()

我通过添加以下调用来修复它： / p>

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

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

在没有可用硬件的情况下检查指纹似乎在某些设备上导致此异常。

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

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