缺少 BiometricPromptCompat

Question

Android P 对 Biometrics API 进行了更改。
现在我们应该使用 BiometricPrompt class 在我们的应用程序中集成生物认证（FingerprintManager 已弃用）。

问题是此 class 仅在 API 28 可用。

A support library is also provided for devices running Android O and earlier, allowing applications to utilize the advantages of this API across more devices .

但是我找不到那个支持库。
它存在吗？还是会在以后的实现中加入？

Answer 1

我认为在您提出问题时，丢失了。 1.0.0-alpha01 于 9 月发布。目前最新版本是 1.0.0-alpha02.
将此添加到您的 build.gradle：

implementation 'androidx.biometric:biometric:1.0.0-alpha02'

(Maven Repository)

Answer 2

正如@JayShortway 回答的那样，向后兼容的依赖项是：

implementation 'androidx.biometric:biometric:1.0.0-alpha02'

但实现与android.hardware.biometrics.BiometricPrompt实现不同：

class BiometricsManagerImpl {

    private val executor = MainThreadExecutor()

    override fun authenticate(activity: FragmentActivity) {
        val prompt = BiometricPrompt(
            activity,
            executor,
            object : BiometricPrompt.AuthenticationCallback() {
                override fun onAuthenticationError(errorCode: Int, errString: CharSequence) {                        
                    super.onAuthenticationError(errorCode, errString)
                    // Handle authentication errors
                }

                override fun onAuthenticationSucceeded(result: BiometricPrompt.AuthenticationResult) {
                    super.onAuthenticationSucceeded(result)
                    // Authentication Succeeded
                }
            })

        val promptInfo = BiometricPrompt.PromptInfo.Builder()
            .setTitle("Biometric Authentication")
            .setDescription("Please authenticate in order to verify your identity")
            .setNegativeButtonText("Cancel")
            .build()

        prompt.authenticate(promptInfo)
    }

    inner class MainThreadExecutor : Executor {
        private val handler = Handler(Looper.getMainLooper())

        override fun execute(runnable: Runnable) {
            handler.post(runnable)
        }
    }
}

缺少 BiometricPromptCompat

BiometricPromptCompat is missing

android

biometrics