| /** |
| * Copyright (C) 2015 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 static com.android.internal.util.Preconditions.checkNotNull; |
| |
| import android.annotation.Nullable; |
| import android.app.usage.NetworkStats.Bucket; |
| import android.content.Context; |
| import android.net.ConnectivityManager; |
| import android.net.DataUsageRequest; |
| import android.net.NetworkIdentity; |
| import android.net.NetworkTemplate; |
| import android.net.INetworkStatsService; |
| import android.os.Binder; |
| import android.os.Build; |
| import android.os.Message; |
| import android.os.Messenger; |
| import android.os.Handler; |
| import android.os.Looper; |
| import android.os.RemoteException; |
| import android.os.ServiceManager; |
| import android.util.Log; |
| |
| /** |
| * Provides access to network usage history and statistics. Usage data is collected in |
| * discrete bins of time called 'Buckets'. See {@link NetworkStats.Bucket} for details. |
| * <p /> |
| * Queries can define a time interval in the form of start and end timestamps (Long.MIN_VALUE and |
| * Long.MAX_VALUE can be used to simulate open ended intervals). By default, apps can only obtain |
| * data about themselves. See the below note for special cases in which apps can obtain data about |
| * other applications. |
| * <h3> |
| * Summary queries |
| * </h3> |
| * {@link #querySummaryForDevice} <p /> |
| * {@link #querySummaryForUser} <p /> |
| * {@link #querySummary} <p /> |
| * These queries aggregate network usage across the whole interval. Therefore there will be only one |
| * bucket for a particular key, state, metered and roaming combination. In case of the user-wide |
| * and device-wide summaries a single bucket containing the totalised network usage is returned. |
| * <h3> |
| * History queries |
| * </h3> |
| * {@link #queryDetailsForUid} <p /> |
| * {@link #queryDetails} <p /> |
| * These queries do not aggregate over time but do aggregate over state, metered and roaming. |
| * Therefore there can be multiple buckets for a particular key but all Bucket's state is going to |
| * be {@link NetworkStats.Bucket#STATE_ALL}, all Bucket's metered is going to be |
| * {@link NetworkStats.Bucket#METERED_ALL}, and all Bucket's roaming is going to be |
| * {@link NetworkStats.Bucket#ROAMING_ALL}. |
| * <p /> |
| * <b>NOTE:</b> Calling {@link #querySummaryForDevice} or accessing stats for apps other than the |
| * calling app requires the permission {@link android.Manifest.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. |
| * <p /> |
| * Profile owner apps are automatically granted permission to query data on the profile they manage |
| * (that is, for any query except {@link #querySummaryForDevice}). Device owner apps and carrier- |
| * privileged apps likewise get access to usage data for all users on the device. |
| * <p /> |
| * In addition to tethering usage, usage by removed users and apps, and usage by the system |
| * is also included in the results for callers with one of these higher levels of access. |
| * <p /> |
| * <b>NOTE:</b> Prior to API level {@value Build.VERSION_CODES#N}, all calls to these APIs required |
| * the above permission, even to access an app's own data usage, and carrier-privileged apps were |
| * not included. |
| */ |
| public class NetworkStatsManager { |
| private static final String TAG = "NetworkStatsManager"; |
| private static final boolean DBG = false; |
| |
| /** @hide */ |
| public static final int CALLBACK_LIMIT_REACHED = 0; |
| /** @hide */ |
| public static final int CALLBACK_RELEASED = 1; |
| |
| private final Context mContext; |
| private final INetworkStatsService mService; |
| |
| /** |
| * {@hide} |
| */ |
| public NetworkStatsManager(Context context) { |
| mContext = context; |
| mService = INetworkStatsService.Stub.asInterface( |
| ServiceManager.getService(Context.NETWORK_STATS_SERVICE)); |
| } |
| |
| /** |
| * Query network usage statistics summaries. Result is summarised data usage for the whole |
| * device. Result is a single Bucket aggregated over time, state, uid, tag, metered, and |
| * roaming. This means the bucket's start and end timestamp are going to be the same as the |
| * 'startTime' and 'endTime' parameters. State is going to be |
| * {@link NetworkStats.Bucket#STATE_ALL}, uid {@link NetworkStats.Bucket#UID_ALL}, |
| * tag {@link NetworkStats.Bucket#TAG_NONE}, metered {@link NetworkStats.Bucket#METERED_ALL}, |
| * and roaming {@link NetworkStats.Bucket#ROAMING_ALL}. |
| * |
| * @param networkType As defined in {@link ConnectivityManager}, e.g. |
| * {@link ConnectivityManager#TYPE_MOBILE}, {@link ConnectivityManager#TYPE_WIFI} |
| * etc. |
| * @param subscriberId If applicable, the subscriber id of the network interface. |
| * @param startTime Start of period. Defined in terms of "Unix time", see |
| * {@link java.lang.System#currentTimeMillis}. |
| * @param endTime End of period. Defined in terms of "Unix time", see |
| * {@link java.lang.System#currentTimeMillis}. |
| * @return Bucket object or null if permissions are insufficient or error happened during |
| * statistics collection. |
| */ |
| public Bucket querySummaryForDevice(int networkType, String subscriberId, |
| long startTime, long endTime) throws SecurityException, RemoteException { |
| NetworkTemplate template; |
| try { |
| template = createTemplate(networkType, subscriberId); |
| } catch (IllegalArgumentException e) { |
| if (DBG) Log.e(TAG, "Cannot create template", e); |
| return null; |
| } |
| |
| Bucket bucket = null; |
| NetworkStats stats = new NetworkStats(mContext, template, startTime, endTime); |
| bucket = stats.getDeviceSummaryForNetwork(); |
| |
| stats.close(); |
| return bucket; |
| } |
| |
| /** |
| * Query network usage statistics summaries. Result is summarised data usage for all uids |
| * belonging to calling user. Result is a single Bucket aggregated over time, state and uid. |
| * This means the bucket's start and end timestamp are going to be the same as the 'startTime' |
| * and 'endTime' parameters. State is going to be {@link NetworkStats.Bucket#STATE_ALL}, |
| * uid {@link NetworkStats.Bucket#UID_ALL}, tag {@link NetworkStats.Bucket#TAG_NONE}, |
| * metered {@link NetworkStats.Bucket#METERED_ALL}, and roaming |
| * {@link NetworkStats.Bucket#ROAMING_ALL}. |
| * |
| * @param networkType As defined in {@link ConnectivityManager}, e.g. |
| * {@link ConnectivityManager#TYPE_MOBILE}, {@link ConnectivityManager#TYPE_WIFI} |
| * etc. |
| * @param subscriberId If applicable, the subscriber id of the network interface. |
| * @param startTime Start of period. Defined in terms of "Unix time", see |
| * {@link java.lang.System#currentTimeMillis}. |
| * @param endTime End of period. Defined in terms of "Unix time", see |
| * {@link java.lang.System#currentTimeMillis}. |
| * @return Bucket object or null if permissions are insufficient or error happened during |
| * statistics collection. |
| */ |
| public Bucket querySummaryForUser(int networkType, String subscriberId, long startTime, |
| long endTime) throws SecurityException, RemoteException { |
| NetworkTemplate template; |
| try { |
| template = createTemplate(networkType, subscriberId); |
| } catch (IllegalArgumentException e) { |
| if (DBG) Log.e(TAG, "Cannot create template", e); |
| return null; |
| } |
| |
| NetworkStats stats; |
| stats = new NetworkStats(mContext, template, startTime, endTime); |
| stats.startSummaryEnumeration(); |
| |
| stats.close(); |
| return stats.getSummaryAggregate(); |
| } |
| |
| /** |
| * Query network usage statistics summaries. Result filtered to include only uids belonging to |
| * calling user. Result is aggregated over time, hence all buckets will have the same start and |
| * end timestamps. State is going to be {@link NetworkStats.Bucket#STATE_ALL}, |
| * uid {@link NetworkStats.Bucket#UID_ALL}, tag {@link NetworkStats.Bucket#TAG_NONE}, |
| * metered {@link NetworkStats.Bucket#METERED_ALL}, and roaming |
| * {@link NetworkStats.Bucket#ROAMING_ALL}. |
| * |
| * @param networkType As defined in {@link ConnectivityManager}, e.g. |
| * {@link ConnectivityManager#TYPE_MOBILE}, {@link ConnectivityManager#TYPE_WIFI} |
| * etc. |
| * @param subscriberId If applicable, the subscriber id of the network interface. |
| * @param startTime Start of period. Defined in terms of "Unix time", see |
| * {@link java.lang.System#currentTimeMillis}. |
| * @param endTime End of period. Defined in terms of "Unix time", see |
| * {@link java.lang.System#currentTimeMillis}. |
| * @return Statistics object or null if permissions are insufficient or error happened during |
| * statistics collection. |
| */ |
| public NetworkStats querySummary(int networkType, String subscriberId, long startTime, |
| long endTime) throws SecurityException, RemoteException { |
| NetworkTemplate template; |
| try { |
| template = createTemplate(networkType, subscriberId); |
| } catch (IllegalArgumentException e) { |
| if (DBG) Log.e(TAG, "Cannot create template", e); |
| return null; |
| } |
| |
| NetworkStats result; |
| result = new NetworkStats(mContext, template, startTime, endTime); |
| result.startSummaryEnumeration(); |
| |
| return result; |
| } |
| |
| /** |
| * Query network usage statistics details for a given uid. |
| * |
| * #see queryDetailsForUidTag(int, String, long, long, int, int) |
| */ |
| public NetworkStats queryDetailsForUid(int networkType, String subscriberId, |
| long startTime, long endTime, int uid) throws SecurityException, RemoteException { |
| return queryDetailsForUidTag(networkType, subscriberId, startTime, endTime, uid, |
| NetworkStats.Bucket.TAG_NONE); |
| } |
| |
| /** |
| * Query network usage statistics details for a given uid and tag. Only usable for uids |
| * belonging to calling user. Result is aggregated over state but not aggregated over time. |
| * This means buckets' start and end timestamps are going to be between 'startTime' and |
| * 'endTime' parameters. State is going to be {@link NetworkStats.Bucket#STATE_ALL}, uid the |
| * same as the 'uid' parameter and tag the same as 'tag' parameter. |
| * <p>Only includes buckets that atomically occur in the inclusive time range. Doesn't |
| * interpolate across partial buckets. Since bucket length is in the order of hours, this |
| * method cannot be used to measure data usage on a fine grained time scale. |
| * |
| * @param networkType As defined in {@link ConnectivityManager}, e.g. |
| * {@link ConnectivityManager#TYPE_MOBILE}, {@link ConnectivityManager#TYPE_WIFI} |
| * etc. |
| * @param subscriberId If applicable, the subscriber id of the network interface. |
| * @param startTime Start of period. Defined in terms of "Unix time", see |
| * {@link java.lang.System#currentTimeMillis}. |
| * @param endTime End of period. Defined in terms of "Unix time", see |
| * {@link java.lang.System#currentTimeMillis}. |
| * @param uid UID of app |
| * @param tag TAG of interest. Use {@link NetworkStats.Bucket#TAG_NONE} for no tags. |
| * @return Statistics object or null if an error happened during statistics collection. |
| * @throws SecurityException if permissions are insufficient to read network statistics. |
| */ |
| public NetworkStats queryDetailsForUidTag(int networkType, String subscriberId, |
| long startTime, long endTime, int uid, int tag) throws SecurityException { |
| NetworkTemplate template; |
| template = createTemplate(networkType, subscriberId); |
| |
| NetworkStats result; |
| try { |
| result = new NetworkStats(mContext, template, startTime, endTime); |
| result.startHistoryEnumeration(uid, tag); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Error while querying stats for uid=" + uid + " tag=" + tag, e); |
| return null; |
| } |
| |
| return result; |
| } |
| |
| /** |
| * Query network usage statistics details. Result filtered to include only uids belonging to |
| * calling user. Result is aggregated over state but not aggregated over time, uid, tag, |
| * metered, nor roaming. This means buckets' start and end timestamps are going to be between |
| * 'startTime' and 'endTime' parameters. State is going to be |
| * {@link NetworkStats.Bucket#STATE_ALL}, uid will vary, |
| * tag {@link NetworkStats.Bucket#TAG_NONE}, metered is going to be |
| * {@link NetworkStats.Bucket#METERED_ALL}, and roaming is going to be |
| * {@link NetworkStats.Bucket#ROAMING_ALL}. |
| * <p>Only includes buckets that atomically occur in the inclusive time range. Doesn't |
| * interpolate across partial buckets. Since bucket length is in the order of hours, this |
| * method cannot be used to measure data usage on a fine grained time scale. |
| * |
| * @param networkType As defined in {@link ConnectivityManager}, e.g. |
| * {@link ConnectivityManager#TYPE_MOBILE}, {@link ConnectivityManager#TYPE_WIFI} |
| * etc. |
| * @param subscriberId If applicable, the subscriber id of the network interface. |
| * @param startTime Start of period. Defined in terms of "Unix time", see |
| * {@link java.lang.System#currentTimeMillis}. |
| * @param endTime End of period. Defined in terms of "Unix time", see |
| * {@link java.lang.System#currentTimeMillis}. |
| * @return Statistics object or null if permissions are insufficient or error happened during |
| * statistics collection. |
| */ |
| public NetworkStats queryDetails(int networkType, String subscriberId, long startTime, |
| long endTime) throws SecurityException, RemoteException { |
| NetworkTemplate template; |
| try { |
| template = createTemplate(networkType, subscriberId); |
| } catch (IllegalArgumentException e) { |
| if (DBG) Log.e(TAG, "Cannot create template", e); |
| return null; |
| } |
| |
| NetworkStats result; |
| result = new NetworkStats(mContext, template, startTime, endTime); |
| result.startUserUidEnumeration(); |
| return result; |
| } |
| |
| /** |
| * Registers to receive notifications about data usage on specified networks. |
| * |
| * #see registerUsageCallback(int, String[], long, UsageCallback, Handler) |
| */ |
| public void registerUsageCallback(int networkType, String subscriberId, long thresholdBytes, |
| UsageCallback callback) { |
| registerUsageCallback(networkType, subscriberId, thresholdBytes, callback, |
| null /* handler */); |
| } |
| |
| /** |
| * Registers to receive notifications about data usage on specified networks. |
| * |
| * <p>The callbacks will continue to be called as long as the process is live or |
| * {@link #unregisterUsageCallback} is called. |
| * |
| * @param networkType Type of network to monitor. Either |
| {@link ConnectivityManager#TYPE_MOBILE} or {@link ConnectivityManager#TYPE_WIFI}. |
| * @param subscriberId If applicable, the subscriber id of the network interface. |
| * @param thresholdBytes Threshold in bytes to be notified on. |
| * @param callback The {@link UsageCallback} that the system will call when data usage |
| * has exceeded the specified threshold. |
| * @param handler to dispatch callback events through, otherwise if {@code null} it uses |
| * the calling thread. |
| */ |
| public void registerUsageCallback(int networkType, String subscriberId, long thresholdBytes, |
| UsageCallback callback, @Nullable Handler handler) { |
| checkNotNull(callback, "UsageCallback cannot be null"); |
| |
| final Looper looper; |
| if (handler == null) { |
| looper = Looper.myLooper(); |
| } else { |
| looper = handler.getLooper(); |
| } |
| |
| if (DBG) { |
| Log.d(TAG, "registerUsageCallback called with: {" |
| + " networkType=" + networkType |
| + " subscriberId=" + subscriberId |
| + " thresholdBytes=" + thresholdBytes |
| + " }"); |
| } |
| |
| NetworkTemplate template = createTemplate(networkType, subscriberId); |
| DataUsageRequest request = new DataUsageRequest(DataUsageRequest.REQUEST_ID_UNSET, |
| template, thresholdBytes); |
| try { |
| CallbackHandler callbackHandler = new CallbackHandler(looper, networkType, |
| subscriberId, callback); |
| callback.request = mService.registerUsageCallback( |
| mContext.getOpPackageName(), request, new Messenger(callbackHandler), |
| new Binder()); |
| if (DBG) Log.d(TAG, "registerUsageCallback returned " + callback.request); |
| |
| if (callback.request == null) { |
| Log.e(TAG, "Request from callback is null; should not happen"); |
| } |
| } catch (RemoteException e) { |
| if (DBG) Log.d(TAG, "Remote exception when registering callback"); |
| throw e.rethrowFromSystemServer(); |
| } |
| } |
| |
| /** |
| * Unregisters callbacks on data usage. |
| * |
| * @param callback The {@link UsageCallback} used when registering. |
| */ |
| public void unregisterUsageCallback(UsageCallback callback) { |
| if (callback == null || callback.request == null |
| || callback.request.requestId == DataUsageRequest.REQUEST_ID_UNSET) { |
| throw new IllegalArgumentException("Invalid UsageCallback"); |
| } |
| try { |
| mService.unregisterUsageRequest(callback.request); |
| } catch (RemoteException e) { |
| if (DBG) Log.d(TAG, "Remote exception when unregistering callback"); |
| throw e.rethrowFromSystemServer(); |
| } |
| } |
| |
| /** |
| * Base class for usage callbacks. Should be extended by applications wanting notifications. |
| */ |
| public static abstract class UsageCallback { |
| |
| /** |
| * Called when data usage has reached the given threshold. |
| */ |
| public abstract void onThresholdReached(int networkType, String subscriberId); |
| |
| /** |
| * @hide used for internal bookkeeping |
| */ |
| private DataUsageRequest request; |
| } |
| |
| private static NetworkTemplate createTemplate(int networkType, String subscriberId) { |
| NetworkTemplate template = null; |
| switch (networkType) { |
| case ConnectivityManager.TYPE_MOBILE: { |
| template = NetworkTemplate.buildTemplateMobileAll(subscriberId); |
| } break; |
| case ConnectivityManager.TYPE_WIFI: { |
| template = NetworkTemplate.buildTemplateWifiWildcard(); |
| } break; |
| default: { |
| throw new IllegalArgumentException("Cannot create template for network type " |
| + networkType + ", subscriberId '" |
| + NetworkIdentity.scrubSubscriberId(subscriberId) + "'."); |
| } |
| } |
| return template; |
| } |
| |
| private static class CallbackHandler extends Handler { |
| private final int mNetworkType; |
| private final String mSubscriberId; |
| private UsageCallback mCallback; |
| |
| CallbackHandler(Looper looper, int networkType, String subscriberId, |
| UsageCallback callback) { |
| super(looper); |
| mNetworkType = networkType; |
| mSubscriberId = subscriberId; |
| mCallback = callback; |
| } |
| |
| @Override |
| public void handleMessage(Message message) { |
| DataUsageRequest request = |
| (DataUsageRequest) getObject(message, DataUsageRequest.PARCELABLE_KEY); |
| |
| switch (message.what) { |
| case CALLBACK_LIMIT_REACHED: { |
| if (mCallback != null) { |
| mCallback.onThresholdReached(mNetworkType, mSubscriberId); |
| } else { |
| Log.e(TAG, "limit reached with released callback for " + request); |
| } |
| break; |
| } |
| case CALLBACK_RELEASED: { |
| if (DBG) Log.d(TAG, "callback released for " + request); |
| mCallback = null; |
| break; |
| } |
| } |
| } |
| |
| private static Object getObject(Message msg, String key) { |
| return msg.getData().getParcelable(key); |
| } |
| } |
| } |