Biometric

The easiest way is to use the new version of Biometric under AndroidX.

You can easily know if the device allows you to use Biometric and under what type (FACE, FINGERPRINT, IRIS, MULTIPLE...). The library also provides a CryptoObject implementation if you want to implement it on your side on CryptoHelper.

USAGE

To used this usefull library you can grab it via Gradle:

implementation 'com.mikhaellopez:biometric:1.1.0'

KOTLIN

val biometricHelper = BiometricHelper(fragment)

// BiometricType = FACE, FINGERPRINT, IRIS, MULTIPLE or NONE
val biometricType: BiometricType = biometricHelper.getBiometricType()

// Check if biometric is available on the device
btnStart.visibility = if (biometricHelper.biometricEnable()) View.VISIBLE else View.GONE

btnStart.setOnClickListener {
    biometricHelper.showBiometricPrompt(
        BiometricPromptInfo(
            title = "Title", // Mandatory
            negativeButtonText = "Cancel", // Mandatory
            subtitle = "Subtitle",
            description = "Description",
            confirmationRequired = true
        )
    ) {
        // Do something when success

    }
}

You can also handle error and failed like this:

biometricHelper.showBiometricPrompt(promptInfo,
    onError = { errorCode: Int, errString: CharSequence ->
        // Do something when error
                    
    }, onFailed = {
        // Do something when failed
                    
    }, onSuccess = { result: BiometricPrompt.AuthenticationResult ->
        // Do something when success
                    
    })

DEMO

Dark Mode	Biometric Fingerprint	Old Fingerprint

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LICENCE