81.8 Configuring the Authentication Callbacks

When the biometric prompt dialog is configured, it will need to be assigned a set of authentication callback methods that can be called to notify the app of the success or failure of the authentication process. These methods need to be wrapped in a BiometricPrompt.AuthenticationCallback class instance. Remaining in the MainActivity.java file, add a method to create and return an instance of this class with the appropriate methods implemented:

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import android.hardware.biometrics.BiometricPrompt;

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    private BiometricPrompt.AuthenticationCallback getAuthenticationCallback() {

 

        return new BiometricPrompt.AuthenticationCallback() {

            @Override

            public void onAuthenticationError(int errorCode,...