1 /*
2  * Copyright (C) 2017 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.settings.deviceinfo.storage;
18 
19 import static android.content.pm.ApplicationInfo.CATEGORY_AUDIO;
20 import static android.content.pm.ApplicationInfo.CATEGORY_GAME;
21 import static android.content.pm.ApplicationInfo.CATEGORY_VIDEO;
22 
23 import android.content.Context;
24 import android.content.pm.ApplicationInfo;
25 import android.content.pm.PackageManager.NameNotFoundException;
26 import android.content.pm.UserInfo;
27 import android.os.UserHandle;
28 import android.util.ArraySet;
29 import android.util.Log;
30 import android.util.SparseArray;
31 
32 import com.android.settings.applications.PackageManagerWrapper;
33 import com.android.settings.applications.UserManagerWrapper;
34 import com.android.settings.utils.AsyncLoader;
35 import com.android.settingslib.applications.StorageStatsSource;
36 
37 import java.io.IOException;
38 import java.util.Collections;
39 import java.util.Comparator;
40 import java.util.List;
41 
42 /**
43  * StorageAsyncLoader is a Loader which loads categorized app information and external stats for all
44  * users
45  */
46 public class StorageAsyncLoader
47         extends AsyncLoader<SparseArray<StorageAsyncLoader.AppsStorageResult>> {
48     private UserManagerWrapper mUserManager;
49     private static final String TAG = "StorageAsyncLoader";
50 
51     private String mUuid;
52     private StorageStatsSource mStatsManager;
53     private PackageManagerWrapper mPackageManager;
54     private ArraySet<String> mSeenPackages;
55 
StorageAsyncLoader(Context context, UserManagerWrapper userManager, String uuid, StorageStatsSource source, PackageManagerWrapper pm)56     public StorageAsyncLoader(Context context, UserManagerWrapper userManager,
57             String uuid, StorageStatsSource source, PackageManagerWrapper pm) {
58         super(context);
59         mUserManager = userManager;
60         mUuid = uuid;
61         mStatsManager = source;
62         mPackageManager = pm;
63     }
64 
65     @Override
loadInBackground()66     public SparseArray<AppsStorageResult> loadInBackground() {
67         return loadApps();
68     }
69 
loadApps()70     private SparseArray<AppsStorageResult> loadApps() {
71         mSeenPackages = new ArraySet<>();
72         SparseArray<AppsStorageResult> result = new SparseArray<>();
73         List<UserInfo> infos = mUserManager.getUsers();
74         // Sort the users by user id ascending.
75         Collections.sort(
76                 infos,
77                 new Comparator<UserInfo>() {
78                     @Override
79                     public int compare(UserInfo userInfo, UserInfo otherUser) {
80                         return Integer.compare(userInfo.id, otherUser.id);
81                     }
82                 });
83         for (int i = 0, userCount = infos.size(); i < userCount; i++) {
84             UserInfo info = infos.get(i);
85             result.put(info.id, getStorageResultForUser(info.id));
86         }
87         return result;
88     }
89 
getStorageResultForUser(int userId)90     private AppsStorageResult getStorageResultForUser(int userId) {
91         Log.d(TAG, "Loading apps");
92         List<ApplicationInfo> applicationInfos =
93                 mPackageManager.getInstalledApplicationsAsUser(0, userId);
94         AppsStorageResult result = new AppsStorageResult();
95         UserHandle myUser = UserHandle.of(userId);
96         for (int i = 0, size = applicationInfos.size(); i < size; i++) {
97             ApplicationInfo app = applicationInfos.get(i);
98 
99             StorageStatsSource.AppStorageStats stats;
100             try {
101                 stats = mStatsManager.getStatsForPackage(mUuid, app.packageName, myUser);
102             } catch (NameNotFoundException | IOException e) {
103                 // This may happen if the package was removed during our calculation.
104                 Log.w(TAG, "App unexpectedly not found", e);
105                 continue;
106             }
107 
108             final long dataSize = stats.getDataBytes();
109             final long cacheQuota = mStatsManager.getCacheQuotaBytes(mUuid, app.uid);
110             final long cacheBytes = stats.getCacheBytes();
111             long blamedSize = dataSize;
112             // Technically, we could overages as freeable on the storage settings screen.
113             // If the app is using more cache than its quota, we would accidentally subtract the
114             // overage from the system size (because it shows up as unused) during our attribution.
115             // Thus, we cap the attribution at the quota size.
116             if (cacheQuota < cacheBytes) {
117                 blamedSize = blamedSize - cacheBytes + cacheQuota;
118             }
119 
120             // This isn't quite right because it slams the first user by user id with the whole code
121             // size, but this ensures that we count all apps seen once.
122             if (!mSeenPackages.contains(app.packageName)) {
123                 blamedSize += stats.getCodeBytes();
124                 mSeenPackages.add(app.packageName);
125             }
126 
127             switch (app.category) {
128                 case CATEGORY_GAME:
129                     result.gamesSize += blamedSize;
130                     break;
131                 case CATEGORY_AUDIO:
132                     result.musicAppsSize += blamedSize;
133                     break;
134                 case CATEGORY_VIDEO:
135                     result.videoAppsSize += blamedSize;
136                     break;
137                 default:
138                     // The deprecated game flag does not set the category.
139                     if ((app.flags & ApplicationInfo.FLAG_IS_GAME) != 0) {
140                         result.gamesSize += blamedSize;
141                         break;
142                     }
143                     result.otherAppsSize += blamedSize;
144                     break;
145             }
146         }
147 
148         Log.d(TAG, "Loading external stats");
149         try {
150             result.externalStats = mStatsManager.getExternalStorageStats(mUuid,
151                     UserHandle.of(userId));
152         } catch (IOException e) {
153             Log.w(TAG, e);
154         }
155         Log.d(TAG, "Obtaining result completed");
156         return result;
157     }
158 
159     @Override
onDiscardResult(SparseArray<AppsStorageResult> result)160     protected void onDiscardResult(SparseArray<AppsStorageResult> result) {
161     }
162 
163     public static class AppsStorageResult {
164         public long gamesSize;
165         public long musicAppsSize;
166         public long videoAppsSize;
167         public long otherAppsSize;
168         public long cacheSize;
169         public StorageStatsSource.ExternalStorageStats externalStats;
170     }
171 
172     /**
173      * ResultHandler defines a destination of data which can handle a result from
174      * {@link StorageAsyncLoader}.
175      */
176     public interface ResultHandler {
handleResult(SparseArray<AppsStorageResult> result)177         void handleResult(SparseArray<AppsStorageResult> result);
178     }
179 }
180