我正在使用 BiometricPrompt 類實現(xiàn)生物識別身份驗證。在調(diào)用方法之前如何檢查硬件是否可用BiometricPrompt#authenticate？如何查看是否已登記生物識別？如何調(diào)用BiometricManager#canAuthenticate方法？我無法在 kotlin 中為 BiometricManager 類創(chuàng)建對象我當(dāng)前的實現(xiàn)如下。 val executor = Executors.newSingleThreadExecutor() val biometricPrompt = BiometricPrompt(this, executor, object : BiometricPrompt.AuthenticationCallback() { override fun onAuthenticationError(errorCode: Int, errString: CharSequence) { super.onAuthenticationError(errorCode, errString) Log.d("BIOMETRIC", "$errString $errorCode") if (BiometricPrompt.ERROR_HW_NOT_PRESENT == errorCode || BiometricPrompt.ERROR_NO_BIOMETRICS == errorCode) PreferenceHandler.setBiometricAvailable(this@LockActivity, false) else PreferenceHandler.setBiometricAvailable(this@LockActivity, true) } override fun onAuthenticationSucceeded(result: BiometricPrompt.AuthenticationResult) { super.onAuthenticationSucceeded(result) } override fun onAuthenticationFailed() { super.onAuthenticationFailed() Log.d("BIOMETRIC", "FAILED") } }) val promptInfo = BiometricPrompt.PromptInfo.Builder() .setTitle("App title") .setSubtitle("") .setDescription("Identify yourself by Biometrics") .setNegativeButtonText("Use Password") .build() biometricPrompt.authenticate(promptInfo)
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問題終于解決了
BiometricManagerandroidx 庫中錯過了課程
androidx.biometric:biometric:1.0.0-alpha04
將庫版本更新為
androidx.biometric:biometric:1.0.0-beta01
現(xiàn)在您可以導(dǎo)入androidx.biometric.BiometricManager
您可以通過以下代碼檢查生物識別硬件的可用性并已注冊生物識別：
object BiometricUtil {
fun isHardwareAvailable(context: Context): Boolean{
return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){
val bm = BiometricManager.from(context)
val canAuthenticate = bm.canAuthenticate()
!(canAuthenticate == BiometricManager.BIOMETRIC_ERROR_NO_HARDWARE || canAuthenticate == BiometricManager.BIOMETRIC_ERROR_HW_UNAVAILABLE)
} else {
false
}
}
fun hasBiometricEnrolled(context: Context): Boolean {
return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){
val bm = BiometricManager.from(context)
val canAuthenticate = bm.canAuthenticate()
(canAuthenticate == BiometricManager.BIOMETRIC_SUCCESS)
} else {
false
}
}
}
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