1 /* 2 * Copyright (C) 2021 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.systemui.biometrics; 18 19 import android.hardware.biometrics.BiometricAuthenticator.Modality; 20 21 /** 22 * Listener for events related to modality changes during operations. 23 * 24 * Used by views such as {@link AuthBiometricFaceToFingerprintView} that support fallback style 25 * authentication. 26 */ 27 public interface ModalityListener { 28 29 /** 30 * The modality has changed. Called after the transition has been fully completed. 31 * 32 * @param oldModality original modality 33 * @param newModality current modality 34 */ onModalitySwitched(@odality int oldModality, @Modality int newModality)35 default void onModalitySwitched(@Modality int oldModality, @Modality int newModality) {} 36 } 37