| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.android.storagemanager.deletionhelper; |
| |
| import android.app.usage.UsageStats; |
| import android.app.usage.UsageStatsManager; |
| import android.content.Context; |
| import android.content.pm.ApplicationInfo; |
| |
| import android.content.pm.PackageInfo; |
| import android.content.pm.PackageManager; |
| import android.os.SystemProperties; |
| import android.os.UserHandle; |
| import android.text.format.DateUtils; |
| import android.util.Log; |
| import com.android.storagemanager.deletionhelper.AppStateBaseBridge.Callback; |
| import com.android.settingslib.applications.ApplicationsState; |
| import com.android.settingslib.applications.ApplicationsState.AppEntry; |
| import com.android.settingslib.applications.ApplicationsState.AppFilter; |
| |
| import java.util.ArrayList; |
| import java.util.Map; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * Connects data from the UsageStatsManager to the ApplicationsState. |
| */ |
| public class AppStateUsageStatsBridge extends AppStateBaseBridge { |
| private static final String TAG = "AppStateUsageStatsBridge"; |
| |
| private static final String DEBUG_APP_UNUSED_OVERRIDE = "debug.asm.app_unused_limit"; |
| public static final long NEVER_USED = Long.MAX_VALUE; |
| public static final long UNKNOWN_LAST_USE = -1; |
| public static final long UNUSED_DAYS_DELETION_THRESHOLD = 90; |
| private static final long DAYS_IN_A_TYPICAL_YEAR = 365; |
| public static final long MIN_DELETION_THRESHOLD = Long.MIN_VALUE; |
| public static final int NORMAL_THRESHOLD = 0; |
| public static final int NO_THRESHOLD = 1; |
| |
| private UsageStatsManager mUsageStatsManager; |
| private PackageManager mPm; |
| // This clock is used to provide the time. By default, it uses the system clock, but can be |
| // replaced for test purposes. |
| protected Clock mClock; |
| |
| public AppStateUsageStatsBridge(Context context, ApplicationsState appState, |
| Callback callback) { |
| super(appState, callback); |
| mUsageStatsManager = |
| (UsageStatsManager) context.getSystemService(Context.USAGE_STATS_SERVICE); |
| mPm = context.getPackageManager(); |
| mClock = new Clock(); |
| } |
| |
| @Override |
| protected void loadAllExtraInfo() { |
| ArrayList<AppEntry> apps = mAppSession.getAllApps(); |
| if (apps == null) return; |
| |
| final Map<String, UsageStats> map = getAggregatedUsageStats(); |
| for (AppEntry entry : apps) { |
| UsageStats usageStats = map.get(entry.info.packageName); |
| entry.extraInfo = new UsageStatsState(getDaysSinceLastUse(usageStats), |
| getDaysSinceInstalled(entry.info.packageName), |
| UserHandle.getUserId(entry.info.uid)); |
| } |
| } |
| |
| @Override |
| protected void updateExtraInfo(AppEntry app, String pkg, int uid) { |
| Map<String, UsageStats> map = getAggregatedUsageStats(); |
| UsageStats usageStats = map.get(app.info.packageName); |
| app.extraInfo = new UsageStatsState(getDaysSinceLastUse(usageStats), |
| getDaysSinceInstalled(app.info.packageName), |
| UserHandle.getUserId(app.info.uid)); |
| } |
| |
| private long getDaysSinceLastUse(UsageStats stats) { |
| if (stats == null) { |
| return NEVER_USED; |
| } |
| long lastUsed = stats.getLastTimeUsed(); |
| // Sometimes, a usage is recorded without a time and we don't know when the use was. |
| if (lastUsed <= 0) { |
| return UNKNOWN_LAST_USE; |
| } |
| |
| // Theoretically, this should be impossible, but UsageStatsService, uh, finds a way. |
| long days = (TimeUnit.MILLISECONDS.toDays(mClock.getCurrentTime() - lastUsed)); |
| if (days > DAYS_IN_A_TYPICAL_YEAR) { |
| return NEVER_USED; |
| } |
| return days; |
| } |
| |
| private long getDaysSinceInstalled(String packageName) { |
| PackageInfo pi = null; |
| try { |
| pi = mPm.getPackageInfo(packageName, 0); |
| } catch (PackageManager.NameNotFoundException e) { |
| Log.e(TAG, packageName + " was not found."); |
| } |
| |
| if (pi == null) { |
| return UNKNOWN_LAST_USE; |
| } |
| return (TimeUnit.MILLISECONDS.toDays(mClock.getCurrentTime() - pi.firstInstallTime)); |
| } |
| |
| private Map<String, UsageStats> getAggregatedUsageStats() { |
| long now = mClock.getCurrentTime(); |
| long startTime = now - DateUtils.YEAR_IN_MILLIS; |
| return mUsageStatsManager.queryAndAggregateUsageStats(startTime, now); |
| } |
| |
| private static boolean isBundled(AppEntry info) { |
| return (info.info.flags & ApplicationInfo.FLAG_SYSTEM) != 0; |
| } |
| |
| private static boolean isPersistentProcess(AppEntry info) { |
| return (info.info.flags & ApplicationInfo.FLAG_PERSISTENT) != 0; |
| } |
| |
| private static boolean isExtraInfoValid(Object extraInfo, long unusedDaysThreshold) { |
| if (extraInfo == null || !(extraInfo instanceof UsageStatsState)) { |
| return false; |
| } |
| |
| UsageStatsState state = (UsageStatsState) extraInfo; |
| |
| // If we are missing information, let's be conservative and not show it. |
| if (state.daysSinceFirstInstall == UNKNOWN_LAST_USE |
| || state.daysSinceLastUse == UNKNOWN_LAST_USE) { |
| Log.w(TAG, "Missing information. Skipping app"); |
| return false; |
| } |
| |
| // If the app has never been used, daysSinceLastUse is Long.MAX_VALUE, so the first |
| // install is always the most recent use. |
| long mostRecentUse = Math.min(state.daysSinceFirstInstall, state.daysSinceLastUse); |
| return mostRecentUse >= unusedDaysThreshold; |
| } |
| |
| public static final AppFilter FILTER_NO_THRESHOLD = |
| new AppFilter() { |
| @Override |
| public void init() {} |
| |
| @Override |
| public boolean filterApp(AppEntry info) { |
| if (info == null) { |
| return false; |
| } |
| return isExtraInfoValid(info.extraInfo, MIN_DELETION_THRESHOLD) |
| && !isBundled(info) |
| && !isPersistentProcess(info); |
| } |
| }; |
| |
| /** |
| * Filters only non-system apps which haven't been used in the last 60 days. If an app's last |
| * usage is unknown, it is skipped. |
| */ |
| public static final AppFilter FILTER_USAGE_STATS = |
| new AppFilter() { |
| private long mUnusedDaysThreshold; |
| |
| @Override |
| public void init() { |
| mUnusedDaysThreshold = |
| SystemProperties.getLong( |
| DEBUG_APP_UNUSED_OVERRIDE, UNUSED_DAYS_DELETION_THRESHOLD); |
| } |
| |
| @Override |
| public boolean filterApp(AppEntry info) { |
| if (info == null) { |
| return false; |
| } |
| return isExtraInfoValid(info.extraInfo, mUnusedDaysThreshold) |
| && !isBundled(info) |
| && !isPersistentProcess(info); |
| } |
| }; |
| |
| /** |
| * UsageStatsState contains the days since the last use and first install of a given app. |
| */ |
| public static class UsageStatsState { |
| public long daysSinceLastUse; |
| public long daysSinceFirstInstall; |
| public int userId; |
| |
| public UsageStatsState(long daysSinceLastUse, long daysSinceFirstInstall, int userId) { |
| this.daysSinceLastUse = daysSinceLastUse; |
| this.daysSinceFirstInstall = daysSinceFirstInstall; |
| this.userId = userId; |
| } |
| } |
| |
| /** |
| * Clock provides the current time. |
| */ |
| static class Clock { |
| public long getCurrentTime() { |
| return System.currentTimeMillis(); |
| } |
| } |
| } |