在Android中使用androidx生物识别API进行人脸验证 [英] Face Authentication using androidx Biometric API in Android

问题描述

我需要集成使用指纹和面部认证的生物识别认证.指纹身份验证可以正常工作，但是当我仅设置面部身份验证时，我无法从BiometricManager.from(context)方法获得生物识别，即未注册响应，如下所示，

I need to integrate Biometric authentication using Fingerprint and Face authentication. Fingerprint authentication works perfectly but when I set only Face authentication I am getting Biometric not enrolled response from BiometricManager.from(context) method as follows,

val biometricManager = BiometricManager.from(context)
    when(biometricManager.canAuthenticate()){
        BiometricManager.BIOMETRIC_SUCCESS ->{
            Log.e(TAG, "App can authenticate using biometrics.")
        }
        BiometricManager.BIOMETRIC_ERROR_NO_HARDWARE ->{
            Log.d(TAG, "Hardware not available")
        }
        BiometricManager.BIOMETRIC_ERROR_HW_UNAVAILABLE ->{
            Log.d(TAG, "Biometric features are currently unavailable.")
        }
        BiometricManager.BIOMETRIC_ERROR_NONE_ENROLLED ->{
            Log.d(TAG, "The user hasn't associated any biometric credentials with their account.")
        }
        else ->{
            Log.d(TAG, "Nothing supported")
        }
    }

推荐答案

查看了实现Android生物识别的所有障碍之后，我选择不使用BiometricManager.from(context)方法来检查是否启用了生物识别，而不是根据提示信息检查是否启用了KEYGUARD_SERVICE并使用了它

After looking at all the hurdles implementing the biometric for Android, I have chosen not to use BiometricManager.from(context) method to check if Biometric authentication is enabled, instead of that checked if KEYGUARD_SERVICE is enabled and used following prompt info

BiometricPrompt.PromptInfo.Builder().apply {
            setTitle(getString(R.string.title))
            setSubtitle(getString(R.string.sub_title))
            setConfirmationRequired(true)
            setDeviceCredentialAllowed(true)
        }.build()

即使仅设置面部ID并且不支持当前的回调，应用程序也会回退到设备PIN身份验证方法.

through which even if only face ID is set and is not supporting the current callbacks, application fallbacks to devices PIN authentication method.

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