1 /* 2 * Copyright (C) 2024 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 android.window; 18 19 import android.annotation.IntDef; 20 21 import java.lang.annotation.Retention; 22 import java.lang.annotation.RetentionPolicy; 23 24 /** 25 * Non-default ahead-of-time system OnBackInvokedCallback. 26 * @hide 27 */ 28 public interface SystemOverrideOnBackInvokedCallback extends OnBackInvokedCallback { 29 /** 30 * No override request 31 */ 32 int OVERRIDE_UNDEFINED = 0; 33 34 /** 35 * Navigating back will bring the task to back 36 */ 37 int OVERRIDE_MOVE_TASK_TO_BACK = 1; 38 39 /** 40 * Navigating back will finish activity, and remove the task if this activity is root activity. 41 */ 42 int OVERRIDE_FINISH_AND_REMOVE_TASK = 2; 43 44 /** @hide */ 45 @IntDef({ 46 OVERRIDE_UNDEFINED, 47 OVERRIDE_MOVE_TASK_TO_BACK, 48 OVERRIDE_FINISH_AND_REMOVE_TASK, 49 }) 50 @Retention(RetentionPolicy.SOURCE) 51 @interface OverrideBehavior { 52 } 53 54 /** 55 * @return Override type of this callback. 56 */ 57 @OverrideBehavior overrideBehavior()58 default int overrideBehavior() { 59 return OVERRIDE_UNDEFINED; 60 } 61 } 62