AuthPromptCallback.java
/*
* Copyright 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.biometric.auth;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.biometric.BiometricPrompt;
import androidx.biometric.BiometricPrompt.AuthenticationError;
import androidx.fragment.app.FragmentActivity;
/**
* A collection of methods that may be invoked by an auth prompt during authentication.
*
* <p>Each method receives a reference to the (possibly {@code null}) activity instance that is
* currently hosting the prompt. This reference should be used to fetch or update any necessary
* activity state in order for changes to be reflected across configuration changes.
*/
public abstract class AuthPromptCallback {
/**
* Called when an unrecoverable error has been encountered and authentication has stopped.
*
* <p>After this method is called, no further events will be sent for the current
* authentication session.
*
* @param activity The activity that is currently hosting the prompt.
* @param errorCode An integer ID associated with the error.
* @param errString A human-readable string that describes the error.
*/
public void onAuthenticationError(
@Nullable FragmentActivity activity,
@AuthenticationError int errorCode,
@NonNull CharSequence errString) {}
/**
* Called when the user has successfully authenticated.
*
* <p>After this method is called, no further events will be sent for the current
* authentication session.
*
* @param activity The activity that is currently hosting the prompt.
* @param result An object containing authentication-related data.
*/
public void onAuthenticationSucceeded(
@Nullable FragmentActivity activity,
@NonNull BiometricPrompt.AuthenticationResult result) {}
/**
* Called when an authentication attempt by the user has been rejected.
*
* @param activity The activity that is currently hosting the prompt.
*/
public void onAuthenticationFailed(@Nullable FragmentActivity activity) {}
}