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.car.settings.applications; 18 19 import static android.app.usage.UsageStatsManager.INTERVAL_MONTHLY; 20 21 import android.app.usage.UsageStats; 22 import android.app.usage.UsageStatsManager; 23 import android.apphibernation.AppHibernationManager; 24 import android.content.Context; 25 import android.content.pm.PackageInfo; 26 import android.content.pm.PackageManager; 27 import android.provider.DeviceConfig; 28 import android.util.ArrayMap; 29 30 import androidx.annotation.NonNull; 31 32 import com.android.settingslib.utils.ThreadUtils; 33 34 import java.util.List; 35 import java.util.Map; 36 import java.util.concurrent.TimeUnit; 37 38 /** 39 * Class for fetching and returning the number of hibernated apps. Largely derived from 40 * {@link com.android.settings.applications.HibernatedAppsPreferenceController}. 41 */ 42 public class HibernatedAppsItemManager { 43 private static final String PROPERTY_HIBERNATION_UNUSED_THRESHOLD_MILLIS = 44 "auto_revoke_unused_threshold_millis2"; 45 private static final long DEFAULT_UNUSED_THRESHOLD_MS = TimeUnit.DAYS.toMillis(90); 46 47 private final Context mContext; 48 49 private HibernatedAppsCountListener mListener; 50 HibernatedAppsItemManager(Context context)51 public HibernatedAppsItemManager(Context context) { 52 mContext = context; 53 } 54 55 /** 56 * Starts fetching recently used apps 57 */ startLoading()58 public void startLoading() { 59 ThreadUtils.postOnBackgroundThread(() -> { 60 int count = getNumHibernated(); 61 ThreadUtils.postOnMainThread(() -> { 62 HibernatedAppsCountListener localListener = mListener; 63 if (localListener != null) { 64 localListener.onHibernatedAppsCountLoaded(count); 65 } 66 }); 67 }); 68 } 69 70 /** 71 * Registers a listener that will be notified once the data is loaded. 72 */ setListener(@onNull HibernatedAppsCountListener listener)73 public void setListener(@NonNull HibernatedAppsCountListener listener) { 74 mListener = listener; 75 } 76 getNumHibernated()77 private int getNumHibernated() { 78 // TODO(b/187465752): Find a way to export this logic from PermissionController module 79 PackageManager pm = mContext.getPackageManager(); 80 AppHibernationManager ahm = 81 mContext.getSystemService(AppHibernationManager.class); 82 List<String> hibernatedPackages = ahm.getHibernatingPackagesForUser(); 83 int numHibernated = hibernatedPackages.size(); 84 85 // Also need to count packages that are auto revoked but not hibernated. 86 int numAutoRevoked = 0; 87 UsageStatsManager usm = mContext.getSystemService(UsageStatsManager.class); 88 long now = System.currentTimeMillis(); 89 long unusedThreshold = DeviceConfig.getLong(DeviceConfig.NAMESPACE_PERMISSIONS, 90 PROPERTY_HIBERNATION_UNUSED_THRESHOLD_MILLIS, DEFAULT_UNUSED_THRESHOLD_MS); 91 List<UsageStats> usageStatsList = usm.queryUsageStats(INTERVAL_MONTHLY, 92 now - unusedThreshold, now); 93 Map<String, UsageStats> recentlyUsedPackages = new ArrayMap<>(); 94 for (UsageStats us : usageStatsList) { 95 recentlyUsedPackages.put(us.mPackageName, us); 96 } 97 List<PackageInfo> packages = pm.getInstalledPackages( 98 PackageManager.MATCH_DISABLED_COMPONENTS | PackageManager.GET_PERMISSIONS); 99 for (PackageInfo pi : packages) { 100 String packageName = pi.packageName; 101 UsageStats usageStats = recentlyUsedPackages.get(packageName); 102 // Only count packages that have not been used recently as auto-revoked permissions may 103 // stay revoked even after use if the user has not regranted them. 104 boolean usedRecently = (usageStats != null 105 && (now - usageStats.getLastTimeAnyComponentUsed() < unusedThreshold 106 || now - usageStats.getLastTimeVisible() < unusedThreshold)); 107 if (!hibernatedPackages.contains(packageName) 108 && pi.requestedPermissions != null 109 && !usedRecently) { 110 for (String perm : pi.requestedPermissions) { 111 if ((pm.getPermissionFlags(perm, packageName, mContext.getUser()) 112 & PackageManager.FLAG_PERMISSION_AUTO_REVOKED) != 0) { 113 numAutoRevoked++; 114 break; 115 } 116 } 117 } 118 } 119 return numHibernated + numAutoRevoked; 120 } 121 122 123 /** 124 * Callback that is called once the count of hibernated apps has been fetched. 125 */ 126 public interface HibernatedAppsCountListener { 127 /** 128 * Called when the count of hibernated apps has loaded. 129 */ onHibernatedAppsCountLoaded(int hibernatedAppsCount)130 void onHibernatedAppsCountLoaded(int hibernatedAppsCount); 131 } 132 } 133