| /** |
| * Copyright (C) 2014 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 android.app.usage; |
| |
| import android.content.Context; |
| import android.content.pm.ParceledListSlice; |
| import android.os.RemoteException; |
| import android.util.ArrayMap; |
| |
| import java.util.Collections; |
| import java.util.List; |
| |
| /** |
| * Provides access to device usage history and statistics. Usage data is aggregated into |
| * time intervals: days, weeks, months, and years. |
| * <p /> |
| * When requesting usage data since a particular time, the request might look something like this: |
| * <pre> |
| * PAST REQUEST_TIME TODAY FUTURE |
| * ————————————————————————————||———————————————————————————¦-----------------------| |
| * YEAR || ¦ | |
| * ————————————————————————————||———————————————————————————¦-----------------------| |
| * MONTH | || MONTH ¦ | |
| * ——————————————————|—————————||———————————————————————————¦-----------------------| |
| * | WEEK | WEEK|| | WEEK | WE¦EK | WEEK | |
| * ————————————————————————————||———————————————————|———————¦-----------------------| |
| * || |DAY|DAY|DAY|DAY¦DAY|DAY|DAY|DAY|DAY|DAY| |
| * ————————————————————————————||———————————————————————————¦-----------------------| |
| * </pre> |
| * A request for data in the middle of a time interval will include that interval. |
| * <p/> |
| * <b>NOTE:</b> This API requires the permission android.permission.PACKAGE_USAGE_STATS, which |
| * is a system-level permission and will not be granted to third-party apps. However, declaring |
| * the permission implies intention to use the API and the user of the device can grant permission |
| * through the Settings application. |
| */ |
| public final class UsageStatsManager { |
| |
| /** |
| * An interval type that spans a day. See {@link #queryUsageStats(int, long, long)}. |
| */ |
| public static final int INTERVAL_DAILY = 0; |
| |
| /** |
| * An interval type that spans a week. See {@link #queryUsageStats(int, long, long)}. |
| */ |
| public static final int INTERVAL_WEEKLY = 1; |
| |
| /** |
| * An interval type that spans a month. See {@link #queryUsageStats(int, long, long)}. |
| */ |
| public static final int INTERVAL_MONTHLY = 2; |
| |
| /** |
| * An interval type that spans a year. See {@link #queryUsageStats(int, long, long)}. |
| */ |
| public static final int INTERVAL_YEARLY = 3; |
| |
| /** |
| * An interval type that will use the best fit interval for the given time range. |
| * See {@link #queryUsageStats(int, long, long)}. |
| */ |
| public static final int INTERVAL_BEST = 4; |
| |
| /** |
| * The number of available intervals. Does not include {@link #INTERVAL_BEST}, since it |
| * is a pseudo interval (it actually selects a real interval). |
| * {@hide} |
| */ |
| public static final int INTERVAL_COUNT = 4; |
| |
| private static final UsageEvents sEmptyResults = new UsageEvents(); |
| |
| private final Context mContext; |
| private final IUsageStatsManager mService; |
| |
| /** |
| * {@hide} |
| */ |
| public UsageStatsManager(Context context, IUsageStatsManager service) { |
| mContext = context; |
| mService = service; |
| } |
| |
| /** |
| * Gets application usage stats for the given time range, aggregated by the specified interval. |
| * <p>The returned list will contain a {@link UsageStats} object for each package that |
| * has data for an interval that is a subset of the time range given. To illustrate:</p> |
| * <pre> |
| * intervalType = INTERVAL_YEARLY |
| * beginTime = 2013 |
| * endTime = 2015 (exclusive) |
| * |
| * Results: |
| * 2013 - com.example.alpha |
| * 2013 - com.example.beta |
| * 2014 - com.example.alpha |
| * 2014 - com.example.beta |
| * 2014 - com.example.charlie |
| * </pre> |
| * |
| * @param intervalType The time interval by which the stats are aggregated. |
| * @param beginTime The inclusive beginning of the range of stats to include in the results. |
| * @param endTime The exclusive end of the range of stats to include in the results. |
| * @return A list of {@link UsageStats} or null if none are available. |
| * |
| * @see #INTERVAL_DAILY |
| * @see #INTERVAL_WEEKLY |
| * @see #INTERVAL_MONTHLY |
| * @see #INTERVAL_YEARLY |
| * @see #INTERVAL_BEST |
| */ |
| @SuppressWarnings("unchecked") |
| public List<UsageStats> queryUsageStats(int intervalType, long beginTime, long endTime) { |
| try { |
| ParceledListSlice<UsageStats> slice = mService.queryUsageStats(intervalType, beginTime, |
| endTime, mContext.getOpPackageName()); |
| if (slice != null) { |
| return slice.getList(); |
| } |
| } catch (RemoteException e) { |
| // fallthrough and return null. |
| } |
| return Collections.EMPTY_LIST; |
| } |
| |
| /** |
| * Query for events in the given time range. Events are only kept by the system for a few |
| * days. |
| * <p /> |
| * <b>NOTE:</b> The last few minutes of the event log will be truncated to prevent abuse |
| * by applications. |
| * |
| * @param beginTime The inclusive beginning of the range of events to include in the results. |
| * @param endTime The exclusive end of the range of events to include in the results. |
| * @return A {@link UsageEvents}. |
| */ |
| @SuppressWarnings("unchecked") |
| public UsageEvents queryEvents(long beginTime, long endTime) { |
| try { |
| UsageEvents iter = mService.queryEvents(beginTime, endTime, |
| mContext.getOpPackageName()); |
| if (iter != null) { |
| return iter; |
| } |
| } catch (RemoteException e) { |
| // fallthrough and return null |
| } |
| return sEmptyResults; |
| } |
| |
| /** |
| * A convenience method that queries for all stats in the given range (using the best interval |
| * for that range), merges the resulting data, and keys it by package name. |
| * See {@link #queryUsageStats(int, long, long)}. |
| * |
| * @param beginTime The inclusive beginning of the range of stats to include in the results. |
| * @param endTime The exclusive end of the range of stats to include in the results. |
| * @return An {@link android.util.ArrayMap} keyed by package name or null if no stats are |
| * available. |
| */ |
| public ArrayMap<String, UsageStats> queryAndAggregateUsageStats(long beginTime, long endTime) { |
| List<UsageStats> stats = queryUsageStats(INTERVAL_BEST, beginTime, endTime); |
| if (stats.isEmpty()) { |
| @SuppressWarnings("unchecked") |
| ArrayMap<String, UsageStats> emptyStats = ArrayMap.EMPTY; |
| return emptyStats; |
| } |
| |
| ArrayMap<String, UsageStats> aggregatedStats = new ArrayMap<>(); |
| final int statCount = stats.size(); |
| for (int i = 0; i < statCount; i++) { |
| UsageStats newStat = stats.get(i); |
| UsageStats existingStat = aggregatedStats.get(newStat.getPackageName()); |
| if (existingStat == null) { |
| aggregatedStats.put(newStat.mPackageName, newStat); |
| } else { |
| existingStat.add(newStat); |
| } |
| } |
| return aggregatedStats; |
| } |
| } |