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.permissioncontroller.hibernation 18 19 import android.app.usage.UsageStatsManager 20 import android.apphibernation.AppHibernationManager 21 import android.content.Context 22 import android.content.Context.APP_HIBERNATION_SERVICE 23 import android.content.Context.USAGE_STATS_SERVICE 24 import android.os.Build 25 import android.os.UserHandle 26 import com.android.permissioncontroller.DumpableLog 27 import com.android.permissioncontroller.permission.model.livedatatypes.LightPackageInfo 28 29 /** 30 * Hibernation controller that handles modifying hibernation state. 31 */ 32 class HibernationController( 33 val context: Context, 34 val unusedThreshold: Long, 35 val targetsPreS: Boolean 36 ) { 37 38 companion object { 39 private const val LOG_TAG = "HibernationController" 40 private const val DEBUG_HIBERNATION = true 41 } 42 43 /** 44 * Hibernates the apps provided for each user. 45 * 46 * @param apps map of each user to a list of packages that should be hibernated for the user 47 * @return list of apps that were successfully hibernated 48 */ hibernateAppsnull49 fun hibernateApps( 50 apps: Map<UserHandle, List<LightPackageInfo>> 51 ): Set<Pair<String, UserHandle>> { 52 val hibernatedApps = mutableSetOf<Pair<String, UserHandle>>() 53 for ((user, userApps) in apps) { 54 val userContext = context.createContextAsUser(user, 0 /* flags */) 55 val hibernationManager = 56 userContext.getSystemService(APP_HIBERNATION_SERVICE) as AppHibernationManager 57 for (pkg in userApps) { 58 try { 59 if (hibernationManager.isHibernatingForUser(pkg.packageName)) { 60 continue 61 } 62 if (!targetsPreS && 63 pkg.targetSdkVersion < Build.VERSION_CODES.S) { 64 // Only apps targeting S or above can be truly hibernated. 65 continue 66 } 67 hibernationManager.setHibernatingForUser(pkg.packageName, true) 68 hibernatedApps.add(pkg.packageName to user) 69 } catch (e: Exception) { 70 DumpableLog.e(LOG_TAG, "Failed to hibernate package: ${pkg.packageName}", e) 71 } 72 } 73 } 74 75 // Globally hibernate any of the hibernated apps that are unused by any user 76 val usageStatsManager = context.getSystemService(USAGE_STATS_SERVICE) as UsageStatsManager 77 val hibernationManager = 78 context.getSystemService(APP_HIBERNATION_SERVICE) as AppHibernationManager 79 val globallyHibernatedApps = mutableSetOf<String>() 80 for ((pkgName, _) in hibernatedApps) { 81 if (globallyHibernatedApps.contains(pkgName) || 82 hibernationManager.isHibernatingGlobally(pkgName)) { 83 continue 84 } 85 86 val now = System.currentTimeMillis() 87 val lastUsedGlobally = usageStatsManager.getLastTimeAnyComponentUsed(pkgName) 88 if (now - lastUsedGlobally < unusedThreshold) { 89 continue 90 } 91 92 hibernationManager.setHibernatingGlobally(pkgName, true) 93 globallyHibernatedApps.add(pkgName) 94 } 95 if (DEBUG_HIBERNATION) { 96 DumpableLog.i(LOG_TAG, 97 "Done hibernating apps $hibernatedApps \n " + 98 "Globally hibernating apps $globallyHibernatedApps") 99 } 100 101 return hibernatedApps 102 } 103 } 104