Java tutorial
/** * 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.annotation.SystemApi; import android.annotation.UnsupportedAppUsage; import android.os.Build; import android.os.Bundle; import android.os.Parcel; import android.os.Parcelable; import android.util.ArrayMap; /** * Contains usage statistics for an app package for a specific * time range. */ public final class UsageStats implements Parcelable { /** * {@hide} */ @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) public String mPackageName; /** * {@hide} */ @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) public long mBeginTimeStamp; /** * {@hide} */ @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) public long mEndTimeStamp; /** * Last time used by the user with an explicit action (notification, activity launch). * {@hide} */ @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) public long mLastTimeUsed; /** * {@hide} */ @UnsupportedAppUsage public long mTotalTimeInForeground; /** * {@hide} */ @UnsupportedAppUsage public int mLaunchCount; /** * {@hide} */ public int mAppLaunchCount; /** * {@hide} */ @UnsupportedAppUsage public int mLastEvent; /** * {@hide} */ public ArrayMap<String, ArrayMap<String, Integer>> mChooserCounts; /** * {@hide} */ public UsageStats() { } public UsageStats(UsageStats stats) { mPackageName = stats.mPackageName; mBeginTimeStamp = stats.mBeginTimeStamp; mEndTimeStamp = stats.mEndTimeStamp; mLastTimeUsed = stats.mLastTimeUsed; mTotalTimeInForeground = stats.mTotalTimeInForeground; mLaunchCount = stats.mLaunchCount; mAppLaunchCount = stats.mAppLaunchCount; mLastEvent = stats.mLastEvent; mChooserCounts = stats.mChooserCounts; } /** * {@hide} */ public UsageStats getObfuscatedForInstantApp() { final UsageStats ret = new UsageStats(this); ret.mPackageName = UsageEvents.INSTANT_APP_PACKAGE_NAME; return ret; } public String getPackageName() { return mPackageName; } /** * Get the beginning of the time range this {@link android.app.usage.UsageStats} represents, * measured in milliseconds since the epoch. * <p/> * See {@link System#currentTimeMillis()}. */ public long getFirstTimeStamp() { return mBeginTimeStamp; } /** * Get the end of the time range this {@link android.app.usage.UsageStats} represents, * measured in milliseconds since the epoch. * <p/> * See {@link System#currentTimeMillis()}. */ public long getLastTimeStamp() { return mEndTimeStamp; } /** * Get the last time this package was used, measured in milliseconds since the epoch. * <p/> * See {@link System#currentTimeMillis()}. */ public long getLastTimeUsed() { return mLastTimeUsed; } /** * Get the total time this package spent in the foreground, measured in milliseconds. */ public long getTotalTimeInForeground() { return mTotalTimeInForeground; } /** * Returns the number of times the app was launched as an activity from outside of the app. * Excludes intra-app activity transitions. * @hide */ @SystemApi public int getAppLaunchCount() { return mAppLaunchCount; } /** * Add the statistics from the right {@link UsageStats} to the left. The package name for * both {@link UsageStats} objects must be the same. * @param right The {@link UsageStats} object to merge into this one. * @throws java.lang.IllegalArgumentException if the package names of the two * {@link UsageStats} objects are different. */ public void add(UsageStats right) { if (!mPackageName.equals(right.mPackageName)) { throw new IllegalArgumentException("Can't merge UsageStats for package '" + mPackageName + "' with UsageStats for package '" + right.mPackageName + "'."); } // We use the mBeginTimeStamp due to a bug where UsageStats files can overlap with // regards to their mEndTimeStamp. if (right.mBeginTimeStamp > mBeginTimeStamp) { // Even though incoming UsageStat begins after this one, its last time used fields // may somehow be empty or chronologically preceding the older UsageStat. mLastEvent = Math.max(mLastEvent, right.mLastEvent); mLastTimeUsed = Math.max(mLastTimeUsed, right.mLastTimeUsed); } mBeginTimeStamp = Math.min(mBeginTimeStamp, right.mBeginTimeStamp); mEndTimeStamp = Math.max(mEndTimeStamp, right.mEndTimeStamp); mTotalTimeInForeground += right.mTotalTimeInForeground; mLaunchCount += right.mLaunchCount; mAppLaunchCount += right.mAppLaunchCount; if (mChooserCounts == null) { mChooserCounts = right.mChooserCounts; } else if (right.mChooserCounts != null) { final int chooserCountsSize = right.mChooserCounts.size(); for (int i = 0; i < chooserCountsSize; i++) { String action = right.mChooserCounts.keyAt(i); ArrayMap<String, Integer> counts = right.mChooserCounts.valueAt(i); if (!mChooserCounts.containsKey(action) || mChooserCounts.get(action) == null) { mChooserCounts.put(action, counts); continue; } final int annotationSize = counts.size(); for (int j = 0; j < annotationSize; j++) { String key = counts.keyAt(j); int rightValue = counts.valueAt(j); int leftValue = mChooserCounts.get(action).getOrDefault(key, 0); mChooserCounts.get(action).put(key, leftValue + rightValue); } } } } @Override public int describeContents() { return 0; } @Override public void writeToParcel(Parcel dest, int flags) { dest.writeString(mPackageName); dest.writeLong(mBeginTimeStamp); dest.writeLong(mEndTimeStamp); dest.writeLong(mLastTimeUsed); dest.writeLong(mTotalTimeInForeground); dest.writeInt(mLaunchCount); dest.writeInt(mAppLaunchCount); dest.writeInt(mLastEvent); Bundle allCounts = new Bundle(); if (mChooserCounts != null) { final int chooserCountSize = mChooserCounts.size(); for (int i = 0; i < chooserCountSize; i++) { String action = mChooserCounts.keyAt(i); ArrayMap<String, Integer> counts = mChooserCounts.valueAt(i); Bundle currentCounts = new Bundle(); final int annotationSize = counts.size(); for (int j = 0; j < annotationSize; j++) { currentCounts.putInt(counts.keyAt(j), counts.valueAt(j)); } allCounts.putBundle(action, currentCounts); } } dest.writeBundle(allCounts); } public static final Creator<UsageStats> CREATOR = new Creator<UsageStats>() { @Override public UsageStats createFromParcel(Parcel in) { UsageStats stats = new UsageStats(); stats.mPackageName = in.readString(); stats.mBeginTimeStamp = in.readLong(); stats.mEndTimeStamp = in.readLong(); stats.mLastTimeUsed = in.readLong(); stats.mTotalTimeInForeground = in.readLong(); stats.mLaunchCount = in.readInt(); stats.mAppLaunchCount = in.readInt(); stats.mLastEvent = in.readInt(); Bundle allCounts = in.readBundle(); if (allCounts != null) { stats.mChooserCounts = new ArrayMap<>(); for (String action : allCounts.keySet()) { if (!stats.mChooserCounts.containsKey(action)) { ArrayMap<String, Integer> newCounts = new ArrayMap<>(); stats.mChooserCounts.put(action, newCounts); } Bundle currentCounts = allCounts.getBundle(action); if (currentCounts != null) { for (String key : currentCounts.keySet()) { int value = currentCounts.getInt(key); if (value > 0) { stats.mChooserCounts.get(action).put(key, value); } } } } } return stats; } @Override public UsageStats[] newArray(int size) { return new UsageStats[size]; } }; }