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.v31 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 androidx.annotation.RequiresApi 27 import com.android.permissioncontroller.DumpableLog 28 import com.android.permissioncontroller.permission.model.livedatatypes.LightPackageInfo 29 30 /** 31 * Hibernation controller that handles modifying hibernation state. 32 */ 33 @RequiresApi(Build.VERSION_CODES.S) 34 class HibernationController( 35 private val context: Context, 36 private val unusedThreshold: Long, 37 private val targetsPreS: Boolean 38 ) { 39 40 companion object { 41 private const val LOG_TAG = "HibernationController" 42 private const val DEBUG_HIBERNATION = true 43 } 44 45 /** 46 * Hibernates the apps provided for each user. 47 * 48 * @param apps map of each user to a list of packages that should be hibernated for the user 49 * @return list of apps that were successfully hibernated 50 */ hibernateAppsnull51 fun hibernateApps( 52 apps: Map<UserHandle, List<LightPackageInfo>> 53 ): Set<Pair<String, UserHandle>> { 54 val hibernatedApps = mutableSetOf<Pair<String, UserHandle>>() 55 for ((user, userApps) in apps) { 56 val userContext = context.createContextAsUser(user, 0 /* flags */) 57 val hibernationManager = 58 userContext.getSystemService(APP_HIBERNATION_SERVICE) as AppHibernationManager 59 for (pkg in userApps) { 60 try { 61 if (hibernationManager.isHibernatingForUser(pkg.packageName)) { 62 continue 63 } 64 if (!targetsPreS && 65 pkg.targetSdkVersion < Build.VERSION_CODES.S) { 66 // Only apps targeting S or above can be truly hibernated. 67 continue 68 } 69 hibernationManager.setHibernatingForUser(pkg.packageName, true) 70 hibernatedApps.add(pkg.packageName to user) 71 } catch (e: Exception) { 72 DumpableLog.e(LOG_TAG, "Failed to hibernate package: ${pkg.packageName}", e) 73 } 74 } 75 } 76 77 // Globally hibernate any of the hibernated apps that are unused by any user 78 val usageStatsManager = context.getSystemService(USAGE_STATS_SERVICE) as UsageStatsManager 79 val hibernationManager = 80 context.getSystemService(APP_HIBERNATION_SERVICE) as AppHibernationManager 81 val globallyHibernatedApps = mutableSetOf<String>() 82 for ((pkgName, _) in hibernatedApps) { 83 if (globallyHibernatedApps.contains(pkgName) || 84 hibernationManager.isHibernatingGlobally(pkgName)) { 85 continue 86 } 87 88 val now = System.currentTimeMillis() 89 val lastUsedGlobally = usageStatsManager.getLastTimeAnyComponentUsed(pkgName) 90 if (now - lastUsedGlobally < unusedThreshold) { 91 continue 92 } 93 94 hibernationManager.setHibernatingGlobally(pkgName, true) 95 globallyHibernatedApps.add(pkgName) 96 } 97 if (DEBUG_HIBERNATION) { 98 DumpableLog.i(LOG_TAG, 99 "Done hibernating apps $hibernatedApps \n " + 100 "Globally hibernating apps $globallyHibernatedApps") 101 } 102 103 return hibernatedApps 104 } 105 } 106