1 /* 2 * Copyright (C) 2025 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.launcher3.util 18 19 import android.app.Activity 20 import android.os.Bundle 21 import androidx.lifecycle.Lifecycle 22 import androidx.lifecycle.LifecycleRegistry 23 import androidx.lifecycle.setViewTreeLifecycleOwner 24 import androidx.savedstate.SavedStateRegistryController 25 import androidx.savedstate.SavedStateRegistryOwner 26 import androidx.savedstate.setViewTreeSavedStateRegistryOwner 27 28 /** Utility class for triggering various lifecycle events based on activity callbacks */ 29 class LifecycleHelper( 30 private val owner: SavedStateRegistryOwner, 31 private val savedStateRegistryController: SavedStateRegistryController, 32 private val lifecycleRegistry: LifecycleRegistry, 33 ) : ActivityLifecycleCallbacksAdapter { 34 onActivityPreCreatednull35 override fun onActivityPreCreated(activity: Activity, savedInstanceState: Bundle?) { 36 savedStateRegistryController.performRestore(savedInstanceState) 37 } 38 onActivityPostCreatednull39 override fun onActivityPostCreated(activity: Activity, savedInstanceState: Bundle?) { 40 activity.window.decorView.setViewTreeLifecycleOwner(owner) 41 activity.window.decorView.setViewTreeSavedStateRegistryOwner(owner) 42 lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_CREATE) 43 } 44 onActivityPostStartednull45 override fun onActivityPostStarted(activity: Activity) { 46 lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_START) 47 } 48 onActivityPostResumednull49 override fun onActivityPostResumed(activity: Activity) { 50 lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_RESUME) 51 } 52 onActivityPrePausednull53 override fun onActivityPrePaused(activity: Activity) { 54 lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_PAUSE) 55 } 56 onActivityPreStoppednull57 override fun onActivityPreStopped(activity: Activity) { 58 lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_STOP) 59 } 60 onActivityPreDestroyednull61 override fun onActivityPreDestroyed(activity: Activity) { 62 lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_DESTROY) 63 } 64 onActivitySaveInstanceStatenull65 override fun onActivitySaveInstanceState(activity: Activity, bundle: Bundle) { 66 lifecycleRegistry.currentState = Lifecycle.State.CREATED 67 savedStateRegistryController.performSave(bundle) 68 } 69 } 70