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Android example source code file (BatteryStats.java)

This example Android source code file (BatteryStats.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" TM.

Java - Android tags/keywords

android, io, map, nu, object, sensor, statistics, stats_current, stats_total, stats_unplugged, string, stringbuilder, timer, total, uid, util, utilities, utils, wifi

The BatteryStats.java Android example source code

/*
 * Copyright (C) 2008 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.os;

import java.io.PrintWriter;
import java.util.Formatter;
import java.util.Map;

import android.util.Log;
import android.util.Printer;
import android.util.SparseArray;

/**
 * A class providing access to battery usage statistics, including information on
 * wakelocks, processes, packages, and services.  All times are represented in microseconds
 * except where indicated otherwise.
 * @hide
 */
public abstract class BatteryStats implements Parcelable {

    private static final boolean LOCAL_LOGV = false;
    
    /**
     * A constant indicating a partial wake lock timer.
     */
    public static final int WAKE_TYPE_PARTIAL = 0;

    /**
     * A constant indicating a full wake lock timer.
     */
    public static final int WAKE_TYPE_FULL = 1;

    /**
     * A constant indicating a window wake lock timer.
     */
    public static final int WAKE_TYPE_WINDOW = 2;
    
    /**
     * A constant indicating a sensor timer.
     * 
     * {@hide}
     */
    public static final int SENSOR = 3;
    
    /**
     * A constant indicating a a wifi turn on timer
     *
     * {@hide}
     */
    public static final int WIFI_TURNED_ON = 4;
    
    /**
     * A constant indicating a full wifi lock timer
     *
     * {@hide}
     */
    public static final int FULL_WIFI_LOCK = 5;
    
    /**
     * A constant indicating a scan wifi lock timer
     *
     * {@hide}
     */
    public static final int SCAN_WIFI_LOCK = 6;

     /**
      * A constant indicating a wifi multicast timer
      *
      * {@hide}
      */
     public static final int WIFI_MULTICAST_ENABLED = 7;

    /**
     * A constant indicating an audio turn on timer
     *
     * {@hide}
     */
    public static final int AUDIO_TURNED_ON = 7;

    /**
     * A constant indicating a video turn on timer
     *
     * {@hide}
     */
    public static final int VIDEO_TURNED_ON = 8;

    /**
     * Include all of the data in the stats, including previously saved data.
     */
    public static final int STATS_TOTAL = 0;

    /**
     * Include only the last run in the stats.
     */
    public static final int STATS_LAST = 1;

    /**
     * Include only the current run in the stats.
     */
    public static final int STATS_CURRENT = 2;

    /**
     * Include only the run since the last time the device was unplugged in the stats.
     */
    public static final int STATS_UNPLUGGED = 3;

    // NOTE: Update this list if you add/change any stats above.
    // These characters are supposed to represent "total", "last", "current", 
    // and "unplugged". They were shortened for effeciency sake.
    private static final String[] STAT_NAMES = { "t", "l", "c", "u" };
    
    /**
     * Bump the version on this if the checkin format changes.
     */
    private static final int BATTERY_STATS_CHECKIN_VERSION = 5;
    
    private static final long BYTES_PER_KB = 1024;
    private static final long BYTES_PER_MB = 1048576; // 1024^2
    private static final long BYTES_PER_GB = 1073741824; //1024^3
    

    private static final String APK_DATA = "apk";
    private static final String PROCESS_DATA = "pr";
    private static final String SENSOR_DATA = "sr";
    private static final String WAKELOCK_DATA = "wl";
    private static final String KERNEL_WAKELOCK_DATA = "kwl";
    private static final String NETWORK_DATA = "nt";
    private static final String USER_ACTIVITY_DATA = "ua";
    private static final String BATTERY_DATA = "bt";
    private static final String BATTERY_LEVEL_DATA = "lv";
    private static final String WIFI_LOCK_DATA = "wfl";
    private static final String MISC_DATA = "m";
    private static final String SCREEN_BRIGHTNESS_DATA = "br";
    private static final String SIGNAL_STRENGTH_TIME_DATA = "sgt";
    private static final String SIGNAL_SCANNING_TIME_DATA = "sst";
    private static final String SIGNAL_STRENGTH_COUNT_DATA = "sgc";
    private static final String DATA_CONNECTION_TIME_DATA = "dct";
    private static final String DATA_CONNECTION_COUNT_DATA = "dcc";

    private final StringBuilder mFormatBuilder = new StringBuilder(32);
    private final Formatter mFormatter = new Formatter(mFormatBuilder);

    /**
     * State for keeping track of counting information.
     */
    public static abstract class Counter {

        /**
         * Returns the count associated with this Counter for the
         * selected type of statistics.
         *
         * @param which one of STATS_TOTAL, STATS_LAST, or STATS_CURRENT
         */
        public abstract int getCountLocked(int which);

        /**
         * Temporary for debugging.
         */
        public abstract void logState(Printer pw, String prefix);
    }

    /**
     * State for keeping track of timing information.
     */
    public static abstract class Timer {

        /**
         * Returns the count associated with this Timer for the
         * selected type of statistics.
         *
         * @param which one of STATS_TOTAL, STATS_LAST, or STATS_CURRENT
         */
        public abstract int getCountLocked(int which);

        /**
         * Returns the total time in microseconds associated with this Timer for the
         * selected type of statistics.
         *
         * @param batteryRealtime system realtime on  battery in microseconds
         * @param which one of STATS_TOTAL, STATS_LAST, or STATS_CURRENT
         * @return a time in microseconds
         */
        public abstract long getTotalTimeLocked(long batteryRealtime, int which);

        /**
         * Temporary for debugging.
         */
        public abstract void logState(Printer pw, String prefix);
    }

    /**
     * The statistics associated with a particular uid.
     */
    public static abstract class Uid {

        /**
         * Returns a mapping containing wakelock statistics.
         *
         * @return a Map from Strings to Uid.Wakelock objects.
         */
        public abstract Map<String, ? extends Wakelock> getWakelockStats();

        /**
         * The statistics associated with a particular wake lock.
         */
        public static abstract class Wakelock {
            public abstract Timer getWakeTime(int type);
        }

        /**
         * Returns a mapping containing sensor statistics.
         *
         * @return a Map from Integer sensor ids to Uid.Sensor objects.
         */
        public abstract Map<Integer, ? extends Sensor> getSensorStats();

        /**
         * Returns a mapping containing process statistics.
         *
         * @return a Map from Strings to Uid.Proc objects.
         */
        public abstract Map<String, ? extends Proc> getProcessStats();

        /**
         * Returns a mapping containing package statistics.
         *
         * @return a Map from Strings to Uid.Pkg objects.
         */
        public abstract Map<String, ? extends Pkg> getPackageStats();
        
        /**
         * {@hide}
         */
        public abstract int getUid();
        
        /**
         * {@hide}
         */
        public abstract long getTcpBytesReceived(int which);
        
        /**
         * {@hide}
         */
        public abstract long getTcpBytesSent(int which);
        
        public abstract void noteWifiTurnedOnLocked();
        public abstract void noteWifiTurnedOffLocked();
        public abstract void noteFullWifiLockAcquiredLocked();
        public abstract void noteFullWifiLockReleasedLocked();
        public abstract void noteScanWifiLockAcquiredLocked();
        public abstract void noteScanWifiLockReleasedLocked();
        public abstract void noteWifiMulticastEnabledLocked();
        public abstract void noteWifiMulticastDisabledLocked();
        public abstract void noteAudioTurnedOnLocked();
        public abstract void noteAudioTurnedOffLocked();
        public abstract void noteVideoTurnedOnLocked();
        public abstract void noteVideoTurnedOffLocked();
        public abstract long getWifiTurnedOnTime(long batteryRealtime, int which);
        public abstract long getFullWifiLockTime(long batteryRealtime, int which);
        public abstract long getScanWifiLockTime(long batteryRealtime, int which);
        public abstract long getWifiMulticastTime(long batteryRealtime,
                                                  int which);
        public abstract long getAudioTurnedOnTime(long batteryRealtime, int which);
        public abstract long getVideoTurnedOnTime(long batteryRealtime, int which);

        /**
         * Note that these must match the constants in android.os.LocalPowerManager.
         */
        static final String[] USER_ACTIVITY_TYPES = {
            "other", "cheek", "touch", "long_touch", "touch_up", "button", "unknown"
        };
        
        public static final int NUM_USER_ACTIVITY_TYPES = 7;
        
        public abstract void noteUserActivityLocked(int type);
        public abstract boolean hasUserActivity();
        public abstract int getUserActivityCount(int type, int which);
        
        public static abstract class Sensor {
            // Magic sensor number for the GPS.
            public static final int GPS = -10000;
            
            public abstract int getHandle();
            
            public abstract Timer getSensorTime();
        }

        /**
         * The statistics associated with a particular process.
         */
        public static abstract class Proc {

            /**
             * Returns the total time (in 1/100 sec) spent executing in user code.
             *
             * @param which one of STATS_TOTAL, STATS_LAST, or STATS_CURRENT.
             */
            public abstract long getUserTime(int which);

            /**
             * Returns the total time (in 1/100 sec) spent executing in system code.
             *
             * @param which one of STATS_TOTAL, STATS_LAST, or STATS_CURRENT.
             */
            public abstract long getSystemTime(int which);

            /**
             * Returns the number of times the process has been started.
             *
             * @param which one of STATS_TOTAL, STATS_LAST, or STATS_CURRENT.
             */
            public abstract int getStarts(int which);

            /**
             * Returns the cpu time spent in microseconds while the process was in the foreground.
             * @param which one of STATS_TOTAL, STATS_LAST, STATS_CURRENT or STATS_UNPLUGGED
             * @return foreground cpu time in microseconds
             */
            public abstract long getForegroundTime(int which);

            /**
             * Returns the approximate cpu time spent in microseconds, at a certain CPU speed.
             * @param speedStep the index of the CPU speed. This is not the actual speed of the
             * CPU.
             * @param which one of STATS_TOTAL, STATS_LAST, STATS_CURRENT or STATS_UNPLUGGED
             * @see BatteryStats#getCpuSpeedSteps()
             */
            public abstract long getTimeAtCpuSpeedStep(int speedStep, int which);
        }

        /**
         * The statistics associated with a particular package.
         */
        public static abstract class Pkg {

            /**
             * Returns the number of times this package has done something that could wake up the
             * device from sleep.
             *
             * @param which one of STATS_TOTAL, STATS_LAST, or STATS_CURRENT.
             */
            public abstract int getWakeups(int which);

            /**
             * Returns a mapping containing service statistics.
             */
            public abstract Map<String, ? extends Serv> getServiceStats();

            /**
             * The statistics associated with a particular service.
             */
            public abstract class Serv {

                /**
                 * Returns the amount of time spent started.
                 *
                 * @param batteryUptime elapsed uptime on battery in microseconds.
                 * @param which one of STATS_TOTAL, STATS_LAST, or STATS_CURRENT.
                 * @return
                 */
                public abstract long getStartTime(long batteryUptime, int which);

                /**
                 * Returns the total number of times startService() has been called.
                 *
                 * @param which one of STATS_TOTAL, STATS_LAST, or STATS_CURRENT.
                 */
                public abstract int getStarts(int which);

                /**
                 * Returns the total number times the service has been launched.
                 *
                 * @param which one of STATS_TOTAL, STATS_LAST, or STATS_CURRENT.
                 */
                public abstract int getLaunches(int which);
            }
        }
    }

    /**
     * Returns the number of times the device has been started.
     */
    public abstract int getStartCount();
    
    /**
     * Returns the time in microseconds that the screen has been on while the device was
     * running on battery.
     * 
     * {@hide}
     */
    public abstract long getScreenOnTime(long batteryRealtime, int which);
    
    public static final int SCREEN_BRIGHTNESS_DARK = 0;
    public static final int SCREEN_BRIGHTNESS_DIM = 1;
    public static final int SCREEN_BRIGHTNESS_MEDIUM = 2;
    public static final int SCREEN_BRIGHTNESS_LIGHT = 3;
    public static final int SCREEN_BRIGHTNESS_BRIGHT = 4;
    
    static final String[] SCREEN_BRIGHTNESS_NAMES = {
        "dark", "dim", "medium", "light", "bright"
    };
    
    public static final int NUM_SCREEN_BRIGHTNESS_BINS = 5;
    
    /**
     * Returns the time in microseconds that the screen has been on with
     * the given brightness
     * 
     * {@hide}
     */
    public abstract long getScreenBrightnessTime(int brightnessBin,
            long batteryRealtime, int which);

    public abstract int getInputEventCount(int which);
    
    /**
     * Returns the time in microseconds that the phone has been on while the device was
     * running on battery.
     * 
     * {@hide}
     */
    public abstract long getPhoneOnTime(long batteryRealtime, int which);

    public static final int SIGNAL_STRENGTH_NONE_OR_UNKNOWN = 0;
    public static final int SIGNAL_STRENGTH_POOR = 1;
    public static final int SIGNAL_STRENGTH_MODERATE = 2;
    public static final int SIGNAL_STRENGTH_GOOD = 3;
    public static final int SIGNAL_STRENGTH_GREAT = 4;
    
    static final String[] SIGNAL_STRENGTH_NAMES = {
        "none", "poor", "moderate", "good", "great"
    };
    
    public static final int NUM_SIGNAL_STRENGTH_BINS = 5;
    
    /**
     * Returns the time in microseconds that the phone has been running with
     * the given signal strength.
     * 
     * {@hide}
     */
    public abstract long getPhoneSignalStrengthTime(int strengthBin,
            long batteryRealtime, int which);

    /**
     * Returns the time in microseconds that the phone has been trying to
     * acquire a signal.
     *
     * {@hide}
     */
    public abstract long getPhoneSignalScanningTime(
            long batteryRealtime, int which);

    /**
     * Returns the number of times the phone has entered the given signal strength.
     * 
     * {@hide}
     */
    public abstract int getPhoneSignalStrengthCount(int strengthBin, int which);

    public static final int DATA_CONNECTION_NONE = 0;
    public static final int DATA_CONNECTION_GPRS = 1;
    public static final int DATA_CONNECTION_EDGE = 2;
    public static final int DATA_CONNECTION_UMTS = 3;
    public static final int DATA_CONNECTION_OTHER = 4;
    
    static final String[] DATA_CONNECTION_NAMES = {
        "none", "gprs", "edge", "umts", "other"
    };
    
    public static final int NUM_DATA_CONNECTION_TYPES = 5;
    
    /**
     * Returns the time in microseconds that the phone has been running with
     * the given data connection.
     * 
     * {@hide}
     */
    public abstract long getPhoneDataConnectionTime(int dataType,
            long batteryRealtime, int which);

    /**
     * Returns the number of times the phone has entered the given data
     * connection type.
     * 
     * {@hide}
     */
    public abstract int getPhoneDataConnectionCount(int dataType, int which);

    /**
     * Returns the time in microseconds that wifi has been on while the device was
     * running on battery.
     * 
     * {@hide}
     */
    public abstract long getWifiOnTime(long batteryRealtime, int which);

    /**
     * Returns the time in microseconds that wifi has been on and the driver has
     * been in the running state while the device was running on battery.
     *
     * {@hide}
     */
    public abstract long getWifiRunningTime(long batteryRealtime, int which);

    /**
     * Returns the time in microseconds that bluetooth has been on while the device was
     * running on battery.
     * 
     * {@hide}
     */
    public abstract long getBluetoothOnTime(long batteryRealtime, int which);
    
    /**
     * Return whether we are currently running on battery.
     */
    public abstract boolean getIsOnBattery();
    
    /**
     * Returns a SparseArray containing the statistics for each uid.
     */
    public abstract SparseArray<? extends Uid> getUidStats();

    /**
     * Returns the current battery uptime in microseconds.
     *
     * @param curTime the amount of elapsed realtime in microseconds.
     */
    public abstract long getBatteryUptime(long curTime);

    /**
     * @deprecated use getRadioDataUptime
     */
    public long getRadioDataUptimeMs() {
        return getRadioDataUptime() / 1000;
    }

    /**
     * Returns the time that the radio was on for data transfers.
     * @return the uptime in microseconds while unplugged
     */
    public abstract long getRadioDataUptime();

    /**
     * Returns the current battery realtime in microseconds.
     *
     * @param curTime the amount of elapsed realtime in microseconds.
     */
    public abstract long getBatteryRealtime(long curTime);
    
    /**
     * Returns the battery percentage level at the last time the device was unplugged from power, or
     * the last time it booted on battery power. 
     */
    public abstract int getDischargeStartLevel();
    
    /**
     * Returns the current battery percentage level if we are in a discharge cycle, otherwise
     * returns the level at the last plug event.
     */
    public abstract int getDischargeCurrentLevel();

    /**
     * Returns the total, last, or current battery uptime in microseconds.
     *
     * @param curTime the elapsed realtime in microseconds.
     * @param which one of STATS_TOTAL, STATS_LAST, or STATS_CURRENT.
     */
    public abstract long computeBatteryUptime(long curTime, int which);

    /**
     * Returns the total, last, or current battery realtime in microseconds.
     *
     * @param curTime the current elapsed realtime in microseconds.
     * @param which one of STATS_TOTAL, STATS_LAST, or STATS_CURRENT.
     */
    public abstract long computeBatteryRealtime(long curTime, int which);

    /**
     * Returns the total, last, or current uptime in microseconds.
     *
     * @param curTime the current elapsed realtime in microseconds.
     * @param which one of STATS_TOTAL, STATS_LAST, or STATS_CURRENT.
     */
    public abstract long computeUptime(long curTime, int which);

    /**
     * Returns the total, last, or current realtime in microseconds.
     * *
     * @param curTime the current elapsed realtime in microseconds.
     * @param which one of STATS_TOTAL, STATS_LAST, or STATS_CURRENT.
     */
    public abstract long computeRealtime(long curTime, int which);
    
    public abstract Map<String, ? extends Timer> getKernelWakelockStats();

    /** Returns the number of different speeds that the CPU can run at */
    public abstract int getCpuSpeedSteps();

    private final static void formatTimeRaw(StringBuilder out, long seconds) {
        long days = seconds / (60 * 60 * 24);
        if (days != 0) {
            out.append(days);
            out.append("d ");
        }
        long used = days * 60 * 60 * 24;

        long hours = (seconds - used) / (60 * 60);
        if (hours != 0 || used != 0) {
            out.append(hours);
            out.append("h ");
        }
        used += hours * 60 * 60;

        long mins = (seconds-used) / 60;
        if (mins != 0 || used != 0) {
            out.append(mins);
            out.append("m ");
        }
        used += mins * 60;

        if (seconds != 0 || used != 0) {
            out.append(seconds-used);
            out.append("s ");
        }
    }

    private final static void formatTime(StringBuilder sb, long time) {
        long sec = time / 100;
        formatTimeRaw(sb, sec);
        sb.append((time - (sec * 100)) * 10);
        sb.append("ms ");
    }

    private final static void formatTimeMs(StringBuilder sb, long time) {
        long sec = time / 1000;
        formatTimeRaw(sb, sec);
        sb.append(time - (sec * 1000));
        sb.append("ms ");
    }

    private final String formatRatioLocked(long num, long den) {
        if (den == 0L) {
            return "---%";
        }
        float perc = ((float)num) / ((float)den) * 100;
        mFormatBuilder.setLength(0);
        mFormatter.format("%.1f%%", perc);
        return mFormatBuilder.toString();
    }

    private final String formatBytesLocked(long bytes) {
        mFormatBuilder.setLength(0);
        
        if (bytes < BYTES_PER_KB) {
            return bytes + "B";
        } else if (bytes < BYTES_PER_MB) {
            mFormatter.format("%.2fKB", bytes / (double) BYTES_PER_KB);
            return mFormatBuilder.toString();
        } else if (bytes < BYTES_PER_GB){
            mFormatter.format("%.2fMB", bytes / (double) BYTES_PER_MB);
            return mFormatBuilder.toString();
        } else {
            mFormatter.format("%.2fGB", bytes / (double) BYTES_PER_GB);
            return mFormatBuilder.toString();
        }
    }

    /**
     *
     * @param sb a StringBuilder object.
     * @param timer a Timer object contining the wakelock times.
     * @param batteryRealtime the current on-battery time in microseconds.
     * @param name the name of the wakelock.
     * @param which which one of STATS_TOTAL, STATS_LAST, or STATS_CURRENT.
     * @param linePrefix a String to be prepended to each line of output.
     * @return the line prefix
     */
    private static final String printWakeLock(StringBuilder sb, Timer timer,
            long batteryRealtime, String name, int which, String linePrefix) {
        
        if (timer != null) {
            // Convert from microseconds to milliseconds with rounding
            long totalTimeMicros = timer.getTotalTimeLocked(batteryRealtime, which);
            long totalTimeMillis = (totalTimeMicros + 500) / 1000;
            
            int count = timer.getCountLocked(which);
            if (totalTimeMillis != 0) {
                sb.append(linePrefix);
                formatTimeMs(sb, totalTimeMillis);
                if (name != null) sb.append(name);
                sb.append(' ');
                sb.append('(');
                sb.append(count);
                sb.append(" times)");
                return ", ";
            }
        }
        return linePrefix;
    }
    
    /**
     * Checkin version of wakelock printer. Prints simple comma-separated list.
     * 
     * @param sb a StringBuilder object.
     * @param timer a Timer object contining the wakelock times.
     * @param now the current time in microseconds.
     * @param name the name of the wakelock.
     * @param which which one of STATS_TOTAL, STATS_LAST, or STATS_CURRENT.
     * @param linePrefix a String to be prepended to each line of output.
     * @return the line prefix
     */
    private static final String printWakeLockCheckin(StringBuilder sb, Timer timer, long now,
            String name, int which, String linePrefix) {
        long totalTimeMicros = 0;
        int count = 0;
        if (timer != null) {
            totalTimeMicros = timer.getTotalTimeLocked(now, which);
            count = timer.getCountLocked(which); 
        }
        sb.append(linePrefix);
        sb.append((totalTimeMicros + 500) / 1000); // microseconds to milliseconds with rounding
        sb.append(',');
        sb.append(name != null ? name + "," : "");
        sb.append(count);
        return ",";
    }
    
    /**
     * Dump a comma-separated line of values for terse checkin mode.
     * 
     * @param pw the PageWriter to dump log to
     * @param category category of data (e.g. "total", "last", "unplugged", "current" )
     * @param type type of data (e.g. "wakelock", "sensor", "process", "apk" ,  "process", "network")
     * @param args type-dependent data arguments
     */
    private static final void dumpLine(PrintWriter pw, int uid, String category, String type, 
           Object... args ) {
        pw.print(BATTERY_STATS_CHECKIN_VERSION); pw.print(',');
        pw.print(uid); pw.print(',');
        pw.print(category); pw.print(',');
        pw.print(type); 
        
        for (Object arg : args) {  
            pw.print(','); 
            pw.print(arg); 
        }
        pw.print('\n');
    }
    
    /**
     * Checkin server version of dump to produce more compact, computer-readable log.
     * 
     * NOTE: all times are expressed in 'ms'.
     */
    public final void dumpCheckinLocked(PrintWriter pw, int which, int reqUid) {
        final long rawUptime = SystemClock.uptimeMillis() * 1000;
        final long rawRealtime = SystemClock.elapsedRealtime() * 1000;
        final long batteryUptime = getBatteryUptime(rawUptime);
        final long batteryRealtime = getBatteryRealtime(rawRealtime);
        final long whichBatteryUptime = computeBatteryUptime(rawUptime, which);
        final long whichBatteryRealtime = computeBatteryRealtime(rawRealtime, which);
        final long totalRealtime = computeRealtime(rawRealtime, which);
        final long totalUptime = computeUptime(rawUptime, which);
        final long screenOnTime = getScreenOnTime(batteryRealtime, which);
        final long phoneOnTime = getPhoneOnTime(batteryRealtime, which);
        final long wifiOnTime = getWifiOnTime(batteryRealtime, which);
        final long wifiRunningTime = getWifiRunningTime(batteryRealtime, which);
        final long bluetoothOnTime = getBluetoothOnTime(batteryRealtime, which);
       
        StringBuilder sb = new StringBuilder(128);
        
        SparseArray<? extends Uid> uidStats = getUidStats();
        final int NU = uidStats.size();
        
        String category = STAT_NAMES[which];
        
        // Dump "battery" stat
        dumpLine(pw, 0 /* uid */, category, BATTERY_DATA, 
                which == STATS_TOTAL ? getStartCount() : "N/A",
                whichBatteryRealtime / 1000, whichBatteryUptime / 1000,
                totalRealtime / 1000, totalUptime / 1000); 
        
        // Calculate total network and wakelock times across all uids.
        long rxTotal = 0;
        long txTotal = 0;
        long fullWakeLockTimeTotal = 0;
        long partialWakeLockTimeTotal = 0;
        
        for (int iu = 0; iu < NU; iu++) {
            Uid u = uidStats.valueAt(iu);
            rxTotal += u.getTcpBytesReceived(which);
            txTotal += u.getTcpBytesSent(which);
            
            Map<String, ? extends BatteryStats.Uid.Wakelock> wakelocks = u.getWakelockStats();
            if (wakelocks.size() > 0) {
                for (Map.Entry<String, ? extends BatteryStats.Uid.Wakelock> ent 
                        : wakelocks.entrySet()) {
                    Uid.Wakelock wl = ent.getValue();
                    
                    Timer fullWakeTimer = wl.getWakeTime(WAKE_TYPE_FULL);
                    if (fullWakeTimer != null) {
                        fullWakeLockTimeTotal += fullWakeTimer.getTotalTimeLocked(batteryRealtime, which);
                    }

                    Timer partialWakeTimer = wl.getWakeTime(WAKE_TYPE_PARTIAL);
                    if (partialWakeTimer != null) {
                        partialWakeLockTimeTotal += partialWakeTimer.getTotalTimeLocked(
                            batteryRealtime, which);
                    }
                }
            }
        }
        
        // Dump misc stats
        dumpLine(pw, 0 /* uid */, category, MISC_DATA,
                screenOnTime / 1000, phoneOnTime / 1000, wifiOnTime / 1000,
                wifiRunningTime / 1000, bluetoothOnTime / 1000, rxTotal, txTotal, 
                fullWakeLockTimeTotal, partialWakeLockTimeTotal,
                getInputEventCount(which));
        
        // Dump screen brightness stats
        Object[] args = new Object[NUM_SCREEN_BRIGHTNESS_BINS];
        for (int i=0; i<NUM_SCREEN_BRIGHTNESS_BINS; i++) {
            args[i] = getScreenBrightnessTime(i, batteryRealtime, which) / 1000;
        }
        dumpLine(pw, 0 /* uid */, category, SCREEN_BRIGHTNESS_DATA, args);
        
        // Dump signal strength stats
        args = new Object[NUM_SIGNAL_STRENGTH_BINS];
        for (int i=0; i<NUM_SIGNAL_STRENGTH_BINS; i++) {
            args[i] = getPhoneSignalStrengthTime(i, batteryRealtime, which) / 1000;
        }
        dumpLine(pw, 0 /* uid */, category, SIGNAL_STRENGTH_TIME_DATA, args);
        dumpLine(pw, 0 /* uid */, category, SIGNAL_SCANNING_TIME_DATA,
                getPhoneSignalScanningTime(batteryRealtime, which) / 1000);
        for (int i=0; i<NUM_SIGNAL_STRENGTH_BINS; i++) {
            args[i] = getPhoneSignalStrengthCount(i, which);
        }
        dumpLine(pw, 0 /* uid */, category, SIGNAL_STRENGTH_COUNT_DATA, args);
        
        // Dump network type stats
        args = new Object[NUM_DATA_CONNECTION_TYPES];
        for (int i=0; i<NUM_DATA_CONNECTION_TYPES; i++) {
            args[i] = getPhoneDataConnectionTime(i, batteryRealtime, which) / 1000;
        }
        dumpLine(pw, 0 /* uid */, category, DATA_CONNECTION_TIME_DATA, args);
        for (int i=0; i<NUM_DATA_CONNECTION_TYPES; i++) {
            args[i] = getPhoneDataConnectionCount(i, which);
        }
        dumpLine(pw, 0 /* uid */, category, DATA_CONNECTION_COUNT_DATA, args);
        
        if (which == STATS_UNPLUGGED) {
            dumpLine(pw, 0 /* uid */, category, BATTERY_LEVEL_DATA, getDischargeStartLevel(), 
                    getDischargeCurrentLevel());
        }
        
        if (reqUid < 0) {
            Map<String, ? extends BatteryStats.Timer> kernelWakelocks = getKernelWakelockStats();
            if (kernelWakelocks.size() > 0) {
                for (Map.Entry<String, ? extends BatteryStats.Timer> ent : kernelWakelocks.entrySet()) {
                    sb.setLength(0);
                    printWakeLockCheckin(sb, ent.getValue(), batteryRealtime, null, which, "");
    
                    dumpLine(pw, 0 /* uid */, category, KERNEL_WAKELOCK_DATA, ent.getKey(), 
                            sb.toString());
                }
            }
        }
        
        for (int iu = 0; iu < NU; iu++) {
            final int uid = uidStats.keyAt(iu);
            if (reqUid >= 0 && uid != reqUid) {
                continue;
            }
            Uid u = uidStats.valueAt(iu);
            // Dump Network stats per uid, if any
            long rx = u.getTcpBytesReceived(which);
            long tx = u.getTcpBytesSent(which);
            long fullWifiLockOnTime = u.getFullWifiLockTime(batteryRealtime, which);
            long scanWifiLockOnTime = u.getScanWifiLockTime(batteryRealtime, which);
            long wifiTurnedOnTime = u.getWifiTurnedOnTime(batteryRealtime, which);
            
            if (rx > 0 || tx > 0) dumpLine(pw, uid, category, NETWORK_DATA, rx, tx);
            
            if (fullWifiLockOnTime != 0 || scanWifiLockOnTime != 0
                    || wifiTurnedOnTime != 0) {
                dumpLine(pw, uid, category, WIFI_LOCK_DATA, 
                        fullWifiLockOnTime, scanWifiLockOnTime, wifiTurnedOnTime);
            }

            if (u.hasUserActivity()) {
                args = new Object[Uid.NUM_USER_ACTIVITY_TYPES];
                boolean hasData = false;
                for (int i=0; i<Uid.NUM_USER_ACTIVITY_TYPES; i++) {
                    int val = u.getUserActivityCount(i, which);
                    args[i] = val;
                    if (val != 0) hasData = true;
                }
                if (hasData) {
                    dumpLine(pw, 0 /* uid */, category, USER_ACTIVITY_DATA, args);
                }
            }
            
            Map<String, ? extends BatteryStats.Uid.Wakelock> wakelocks = u.getWakelockStats();
            if (wakelocks.size() > 0) {
                for (Map.Entry<String, ? extends BatteryStats.Uid.Wakelock> ent
                        : wakelocks.entrySet()) {
                    Uid.Wakelock wl = ent.getValue();
                    String linePrefix = "";
                    sb.setLength(0);
                    linePrefix = printWakeLockCheckin(sb, wl.getWakeTime(WAKE_TYPE_FULL), 
                            batteryRealtime, "f", which, linePrefix);
                    linePrefix = printWakeLockCheckin(sb, wl.getWakeTime(WAKE_TYPE_PARTIAL), 
                            batteryRealtime, "p", which, linePrefix);
                    linePrefix = printWakeLockCheckin(sb, wl.getWakeTime(WAKE_TYPE_WINDOW), 
                            batteryRealtime, "w", which, linePrefix);
                    
                    // Only log if we had at lease one wakelock...
                    if (sb.length() > 0) {
                       dumpLine(pw, uid, category, WAKELOCK_DATA, ent.getKey(), sb.toString());
                    }
                }
            }
                
            Map<Integer, ? extends BatteryStats.Uid.Sensor> sensors = u.getSensorStats();
            if (sensors.size() > 0)  {
                for (Map.Entry<Integer, ? extends BatteryStats.Uid.Sensor> ent
                        : sensors.entrySet()) {
                    Uid.Sensor se = ent.getValue();
                    int sensorNumber = ent.getKey();
                    Timer timer = se.getSensorTime();
                    if (timer != null) {
                        // Convert from microseconds to milliseconds with rounding
                        long totalTime = (timer.getTotalTimeLocked(batteryRealtime, which) + 500) / 1000;
                        int count = timer.getCountLocked(which);
                        if (totalTime != 0) {
                            dumpLine(pw, uid, category, SENSOR_DATA, sensorNumber, totalTime, count);
                        }
                    } 
                }
            }

            Map<String, ? extends BatteryStats.Uid.Proc> processStats = u.getProcessStats();
            if (processStats.size() > 0) {
                for (Map.Entry<String, ? extends BatteryStats.Uid.Proc> ent
                        : processStats.entrySet()) {
                    Uid.Proc ps = ent.getValue();
    
                    long userTime = ps.getUserTime(which);
                    long systemTime = ps.getSystemTime(which);
                    int starts = ps.getStarts(which);
    
                    if (userTime != 0 || systemTime != 0 || starts != 0) {
                        dumpLine(pw, uid, category, PROCESS_DATA, 
                                ent.getKey(), // proc
                                userTime * 10, // cpu time in ms
                                systemTime * 10, // user time in ms
                                starts); // process starts
                    }
                }
            }

            Map<String, ? extends BatteryStats.Uid.Pkg> packageStats = u.getPackageStats();
            if (packageStats.size() > 0) {
                for (Map.Entry<String, ? extends BatteryStats.Uid.Pkg> ent
                        : packageStats.entrySet()) {
              
                    Uid.Pkg ps = ent.getValue();
                    int wakeups = ps.getWakeups(which);
                    Map<String, ? extends  Uid.Pkg.Serv> serviceStats = ps.getServiceStats();
                    for (Map.Entry<String, ? extends BatteryStats.Uid.Pkg.Serv> sent
                            : serviceStats.entrySet()) {
                        BatteryStats.Uid.Pkg.Serv ss = sent.getValue();
                        long startTime = ss.getStartTime(batteryUptime, which);
                        int starts = ss.getStarts(which);
                        int launches = ss.getLaunches(which);
                        if (startTime != 0 || starts != 0 || launches != 0) {
                            dumpLine(pw, uid, category, APK_DATA, 
                                    wakeups, // wakeup alarms
                                    ent.getKey(), // Apk
                                    sent.getKey(), // service
                                    startTime / 1000, // time spent started, in ms
                                    starts,
                                    launches);
                        }
                    }
                }
            }
        }
    }

    @SuppressWarnings("unused")
    public final void dumpLocked(PrintWriter pw, String prefix, int which, int reqUid) {
        final long rawUptime = SystemClock.uptimeMillis() * 1000;
        final long rawRealtime = SystemClock.elapsedRealtime() * 1000;
        final long batteryUptime = getBatteryUptime(rawUptime);
        final long batteryRealtime = getBatteryRealtime(rawRealtime);

        final long whichBatteryUptime = computeBatteryUptime(rawUptime, which);
        final long whichBatteryRealtime = computeBatteryRealtime(rawRealtime, which);
        final long totalRealtime = computeRealtime(rawRealtime, which);
        final long totalUptime = computeUptime(rawUptime, which);
        
        StringBuilder sb = new StringBuilder(128);
        
        SparseArray<? extends Uid> uidStats = getUidStats();
        final int NU = uidStats.size();

        sb.setLength(0);
        sb.append(prefix);
                sb.append("  Time on battery: ");
                formatTimeMs(sb, whichBatteryRealtime / 1000); sb.append("(");
                sb.append(formatRatioLocked(whichBatteryRealtime, totalRealtime));
                sb.append(") realtime, ");
                formatTimeMs(sb, whichBatteryUptime / 1000);
                sb.append("("); sb.append(formatRatioLocked(whichBatteryUptime, totalRealtime));
                sb.append(") uptime");
        pw.println(sb.toString());
        sb.setLength(0);
        sb.append(prefix);
                sb.append("  Total run time: ");
                formatTimeMs(sb, totalRealtime / 1000);
                sb.append("realtime, ");
                formatTimeMs(sb, totalUptime / 1000);
                sb.append("uptime, ");
        pw.println(sb.toString());
        
        final long screenOnTime = getScreenOnTime(batteryRealtime, which);
        final long phoneOnTime = getPhoneOnTime(batteryRealtime, which);
        final long wifiRunningTime = getWifiRunningTime(batteryRealtime, which);
        final long wifiOnTime = getWifiOnTime(batteryRealtime, which);
        final long bluetoothOnTime = getBluetoothOnTime(batteryRealtime, which);
        sb.setLength(0);
        sb.append(prefix);
                sb.append("  Screen on: "); formatTimeMs(sb, screenOnTime / 1000);
                sb.append("("); sb.append(formatRatioLocked(screenOnTime, whichBatteryRealtime));
                sb.append("), Input events: "); sb.append(getInputEventCount(which));
                sb.append(", Active phone call: "); formatTimeMs(sb, phoneOnTime / 1000);
                sb.append("("); sb.append(formatRatioLocked(phoneOnTime, whichBatteryRealtime));
                sb.append(")");
        pw.println(sb.toString());
        sb.setLength(0);
        sb.append(prefix);
        sb.append("  Screen brightnesses: ");
        boolean didOne = false;
        for (int i=0; i<NUM_SCREEN_BRIGHTNESS_BINS; i++) {
            final long time = getScreenBrightnessTime(i, batteryRealtime, which);
            if (time == 0) {
                continue;
            }
            if (didOne) sb.append(", ");
            didOne = true;
            sb.append(SCREEN_BRIGHTNESS_NAMES[i]);
            sb.append(" ");
            formatTimeMs(sb, time/1000);
            sb.append("(");
            sb.append(formatRatioLocked(time, screenOnTime));
            sb.append(")");
        }
        if (!didOne) sb.append("No activity");
        pw.println(sb.toString());
        
        // Calculate total network and wakelock times across all uids.
        long rxTotal = 0;
        long txTotal = 0;
        long fullWakeLockTimeTotalMicros = 0;
        long partialWakeLockTimeTotalMicros = 0;
        
        if (reqUid < 0) {
            Map<String, ? extends BatteryStats.Timer> kernelWakelocks = getKernelWakelockStats();
            if (kernelWakelocks.size() > 0) {
                for (Map.Entry<String, ? extends BatteryStats.Timer> ent : kernelWakelocks.entrySet()) {
                    
                    String linePrefix = ": ";
                    sb.setLength(0);
                    sb.append(prefix);
                    sb.append("  Kernel Wake lock ");
                    sb.append(ent.getKey());
                    linePrefix = printWakeLock(sb, ent.getValue(), batteryRealtime, null, which, 
                            linePrefix);
                    if (!linePrefix.equals(": ")) {
                        sb.append(" realtime");
                    } else {
                        sb.append(": (nothing executed)");
                    }
                    pw.println(sb.toString());
                }
            }
        }
    
        for (int iu = 0; iu < NU; iu++) {
            Uid u = uidStats.valueAt(iu);
            rxTotal += u.getTcpBytesReceived(which);
            txTotal += u.getTcpBytesSent(which);
            
            Map<String, ? extends BatteryStats.Uid.Wakelock> wakelocks = u.getWakelockStats();
            if (wakelocks.size() > 0) {
                for (Map.Entry<String, ? extends BatteryStats.Uid.Wakelock> ent 
                        : wakelocks.entrySet()) {
                    Uid.Wakelock wl = ent.getValue();
                    
                    Timer fullWakeTimer = wl.getWakeTime(WAKE_TYPE_FULL);
                    if (fullWakeTimer != null) {
                        fullWakeLockTimeTotalMicros += fullWakeTimer.getTotalTimeLocked(
                                batteryRealtime, which);
                    }

                    Timer partialWakeTimer = wl.getWakeTime(WAKE_TYPE_PARTIAL);
                    if (partialWakeTimer != null) {
                        partialWakeLockTimeTotalMicros += partialWakeTimer.getTotalTimeLocked(
                                batteryRealtime, which);
                    }
                }
            }
        }
        
        pw.print(prefix);
                pw.print("  Total received: "); pw.print(formatBytesLocked(rxTotal));
                pw.print(", Total sent: "); pw.println(formatBytesLocked(txTotal));
        sb.setLength(0);
        sb.append(prefix);
                sb.append("  Total full wakelock time: "); formatTimeMs(sb,
                        (fullWakeLockTimeTotalMicros + 500) / 1000);
                sb.append(", Total partial waklock time: "); formatTimeMs(sb,
                        (partialWakeLockTimeTotalMicros + 500) / 1000);
        pw.println(sb.toString());
        
        sb.setLength(0);
        sb.append(prefix);
        sb.append("  Signal levels: ");
        didOne = false;
        for (int i=0; i<NUM_SIGNAL_STRENGTH_BINS; i++) {
            final long time = getPhoneSignalStrengthTime(i, batteryRealtime, which);
            if (time == 0) {
                continue;
            }
            if (didOne) sb.append(", ");
            didOne = true;
            sb.append(SIGNAL_STRENGTH_NAMES[i]);
            sb.append(" ");
            formatTimeMs(sb, time/1000);
            sb.append("(");
            sb.append(formatRatioLocked(time, whichBatteryRealtime));
            sb.append(") ");
            sb.append(getPhoneSignalStrengthCount(i, which));
            sb.append("x");
        }
        if (!didOne) sb.append("No activity");
        pw.println(sb.toString());

        sb.setLength(0);
        sb.append(prefix);
        sb.append("  Signal scanning time: ");
        formatTimeMs(sb, getPhoneSignalScanningTime(batteryRealtime, which) / 1000);
        pw.println(sb.toString());

        sb.setLength(0);
        sb.append(prefix);
        sb.append("  Radio types: ");
        didOne = false;
        for (int i=0; i<NUM_DATA_CONNECTION_TYPES; i++) {
            final long time = getPhoneDataConnectionTime(i, batteryRealtime, which);
            if (time == 0) {
                continue;
            }
            if (didOne) sb.append(", ");
            didOne = true;
            sb.append(DATA_CONNECTION_NAMES[i]);
            sb.append(" ");
            formatTimeMs(sb, time/1000);
            sb.append("(");
            sb.append(formatRatioLocked(time, whichBatteryRealtime));
            sb.append(") ");
            sb.append(getPhoneDataConnectionCount(i, which));
            sb.append("x");
        }
        if (!didOne) sb.append("No activity");
        pw.println(sb.toString());

        sb.setLength(0);
        sb.append(prefix);
        sb.append("  Radio data uptime when unplugged: ");
        sb.append(getRadioDataUptime() / 1000);
        sb.append(" ms");
        pw.println(sb.toString());

        sb.setLength(0);
        sb.append(prefix);
                sb.append("  Wifi on: "); formatTimeMs(sb, wifiOnTime / 1000);
                sb.append("("); sb.append(formatRatioLocked(wifiOnTime, whichBatteryRealtime));
                sb.append("), Wifi running: "); formatTimeMs(sb, wifiRunningTime / 1000);
                sb.append("("); sb.append(formatRatioLocked(wifiRunningTime, whichBatteryRealtime));
                sb.append("), Bluetooth on: "); formatTimeMs(sb, bluetoothOnTime / 1000);
                sb.append("("); sb.append(formatRatioLocked(bluetoothOnTime, whichBatteryRealtime));
                sb.append(")");
        pw.println(sb.toString());
        
        pw.println(" ");

        if (which == STATS_UNPLUGGED) {
            if (getIsOnBattery()) {
                pw.print(prefix); pw.println("  Device is currently unplugged");
                pw.print(prefix); pw.print("    Discharge cycle start level: "); 
                        pw.println(getDischargeStartLevel());
                pw.print(prefix); pw.print("    Discharge cycle current level: ");
                        pw.println(getDischargeCurrentLevel());
            } else {
                pw.print(prefix); pw.println("  Device is currently plugged into power");
                pw.print(prefix); pw.print("    Last discharge cycle start level: "); 
                        pw.println(getDischargeStartLevel());
                pw.print(prefix); pw.print("    Last discharge cycle end level: "); 
                        pw.println(getDischargeCurrentLevel());
            }
            pw.println(" ");
        }
        

        for (int iu=0; iu<NU; iu++) {
            final int uid = uidStats.keyAt(iu);
            if (reqUid >= 0 && uid != reqUid) {
                continue;
            }
            
            Uid u = uidStats.valueAt(iu);
            
            pw.println(prefix + "  #" + uid + ":");
            boolean uidActivity = false;
            
            long tcpReceived = u.getTcpBytesReceived(which);
            long tcpSent = u.getTcpBytesSent(which);
            long fullWifiLockOnTime = u.getFullWifiLockTime(batteryRealtime, which);
            long scanWifiLockOnTime = u.getScanWifiLockTime(batteryRealtime, which);
            long wifiTurnedOnTime = u.getWifiTurnedOnTime(batteryRealtime, which);
            
            if (tcpReceived != 0 || tcpSent != 0) {
                pw.print(prefix); pw.print("    Network: ");
                        pw.print(formatBytesLocked(tcpReceived)); pw.print(" received, ");
                        pw.print(formatBytesLocked(tcpSent)); pw.println(" sent");
            }
            
            if (u.hasUserActivity()) {
                boolean hasData = false;
                for (int i=0; i<NUM_SCREEN_BRIGHTNESS_BINS; i++) {
                    int val = u.getUserActivityCount(i, which);
                    if (val != 0) {
                        if (!hasData) {
                            sb.setLength(0);
                            sb.append("    User activity: ");
                            hasData = true;
                        } else {
                            sb.append(", ");
                        }
                        sb.append(val);
                        sb.append(" ");
                        sb.append(Uid.USER_ACTIVITY_TYPES[i]);
                    }
                }
                if (hasData) {
                    pw.println(sb.toString());
                }
            }
            
            if (fullWifiLockOnTime != 0 || scanWifiLockOnTime != 0
                    || wifiTurnedOnTime != 0) {
                sb.setLength(0);
                sb.append(prefix); sb.append("    Turned Wifi On: "); 
                        formatTimeMs(sb, wifiTurnedOnTime / 1000); 
                        sb.append("("); sb.append(formatRatioLocked(wifiTurnedOnTime, 
                                whichBatteryRealtime)); sb.append(")\n");
                sb.append(prefix); sb.append("    Full Wifi Lock: "); 
                        formatTimeMs(sb, fullWifiLockOnTime / 1000); 
                        sb.append("("); sb.append(formatRatioLocked(fullWifiLockOnTime, 
                                whichBatteryRealtime)); sb.append(")\n");
                sb.append(prefix); sb.append("    Scan Wifi Lock: "); 
                        formatTimeMs(sb, scanWifiLockOnTime / 1000);
                        sb.append("("); sb.append(formatRatioLocked(scanWifiLockOnTime, 
                                whichBatteryRealtime)); sb.append(")");
                pw.println(sb.toString());
            }

            Map<String, ? extends BatteryStats.Uid.Wakelock> wakelocks = u.getWakelockStats();
            if (wakelocks.size() > 0) {
                for (Map.Entry<String, ? extends BatteryStats.Uid.Wakelock> ent
                    : wakelocks.entrySet()) {
                    Uid.Wakelock wl = ent.getValue();
                    String linePrefix = ": ";
                    sb.setLength(0);
                    sb.append(prefix);
                    sb.append("    Wake lock ");
                    sb.append(ent.getKey());
                    linePrefix = printWakeLock(sb, wl.getWakeTime(WAKE_TYPE_FULL), batteryRealtime,
                            "full", which, linePrefix);
                    linePrefix = printWakeLock(sb, wl.getWakeTime(WAKE_TYPE_PARTIAL), batteryRealtime,
                            "partial", which, linePrefix);
                    linePrefix = printWakeLock(sb, wl.getWakeTime(WAKE_TYPE_WINDOW), batteryRealtime,
                            "window", which, linePrefix);
                    if (!linePrefix.equals(": ")) {
                        sb.append(" realtime");
                    } else {
                        sb.append(": (nothing executed)");
                    }
                    pw.println(sb.toString());
                    uidActivity = true;
                }
            }

            Map<Integer, ? extends BatteryStats.Uid.Sensor> sensors = u.getSensorStats();
            if (sensors.size() > 0) {
                for (Map.Entry<Integer, ? extends BatteryStats.Uid.Sensor> ent
                    : sensors.entrySet()) {
                    Uid.Sensor se = ent.getValue();
                    int sensorNumber = ent.getKey();
                    sb.setLength(0);
                    sb.append(prefix);
                    sb.append("    Sensor ");
                    int handle = se.getHandle();
                    if (handle == Uid.Sensor.GPS) {
                        sb.append("GPS");
                    } else {
                        sb.append(handle);
                    }
                    sb.append(": ");

                    Timer timer = se.getSensorTime();
                    if (timer != null) {
                        // Convert from microseconds to milliseconds with rounding
                        long totalTime = (timer.getTotalTimeLocked(
                                batteryRealtime, which) + 500) / 1000;
                        int count = timer.getCountLocked(which);
                        //timer.logState();
                        if (totalTime != 0) {
                            formatTimeMs(sb, totalTime);
                            sb.append("realtime (");
                            sb.append(count);
                            sb.append(" times)");
                        } else {
                            sb.append("(not used)");
                        }
                    } else {
                        sb.append("(not used)");
                    }

                    pw.println(sb.toString());
                    uidActivity = true;
                }
            }

            Map<String, ? extends BatteryStats.Uid.Proc> processStats = u.getProcessStats();
            if (processStats.size() > 0) {
                for (Map.Entry<String, ? extends BatteryStats.Uid.Proc> ent
                    : processStats.entrySet()) {
                    Uid.Proc ps = ent.getValue();
                    long userTime;
                    long systemTime;
                    int starts;

                    userTime = ps.getUserTime(which);
                    systemTime = ps.getSystemTime(which);
                    starts = ps.getStarts(which);

                    if (userTime != 0 || systemTime != 0 || starts != 0) {
                        sb.setLength(0);
                        sb.append(prefix); sb.append("    Proc ");
                                sb.append(ent.getKey()); sb.append(":\n");
                        sb.append(prefix); sb.append("      CPU: ");
                                formatTime(sb, userTime); sb.append("usr + ");
                                formatTime(sb, systemTime); sb.append("krn\n");
                        sb.append(prefix); sb.append("      "); sb.append(starts);
                                sb.append(" proc starts");
                        pw.println(sb.toString());
                        uidActivity = true;
                    }
                }
            }

            Map<String, ? extends BatteryStats.Uid.Pkg> packageStats = u.getPackageStats();
            if (packageStats.size() > 0) {
                for (Map.Entry<String, ? extends BatteryStats.Uid.Pkg> ent
                    : packageStats.entrySet()) {
                    pw.print(prefix); pw.print("    Apk "); pw.print(ent.getKey()); pw.println(":");
                    boolean apkActivity = false;
                    Uid.Pkg ps = ent.getValue();
                    int wakeups = ps.getWakeups(which);
                    if (wakeups != 0) {
                        pw.print(prefix); pw.print("      ");
                                pw.print(wakeups); pw.println(" wakeup alarms");
                        apkActivity = true;
                    }
                    Map<String, ? extends  Uid.Pkg.Serv> serviceStats = ps.getServiceStats();
                    if (serviceStats.size() > 0) {
                        for (Map.Entry<String, ? extends BatteryStats.Uid.Pkg.Serv> sent
                                : serviceStats.entrySet()) {
                            BatteryStats.Uid.Pkg.Serv ss = sent.getValue();
                            long startTime = ss.getStartTime(batteryUptime, which);
                            int starts = ss.getStarts(which);
                            int launches = ss.getLaunches(which);
                            if (startTime != 0 || starts != 0 || launches != 0) {
                                sb.setLength(0);
                                sb.append(prefix); sb.append("      Service ");
                                        sb.append(sent.getKey()); sb.append(":\n");
                                sb.append(prefix); sb.append("        Created for: ");
                                        formatTimeMs(sb, startTime / 1000);
                                        sb.append(" uptime\n");
                                sb.append(prefix); sb.append("        Starts: ");
                                        sb.append(starts);
                                        sb.append(", launches: "); sb.append(launches);
                                pw.println(sb.toString());
                                apkActivity = true;
                            }
                        }
                    }
                    if (!apkActivity) {
                        pw.print(prefix); pw.println("      (nothing executed)");
                    }
                    uidActivity = true;
                }
            }
            if (!uidActivity) {
                pw.print(prefix); pw.println("    (nothing executed)");
            }
        }
    }

    /**
     * Dumps a human-readable summary of the battery statistics to the given PrintWriter.
     *
     * @param pw a Printer to receive the dump output.
     */
    @SuppressWarnings("unused")
    public void dumpLocked(PrintWriter pw) {
        pw.println("Total Statistics (Current and Historic):");
        pw.println("  System starts: " + getStartCount()
                + ", currently on battery: " + getIsOnBattery());
        dumpLocked(pw, "", STATS_TOTAL, -1);
        pw.println("");
        pw.println("Last Run Statistics (Previous run of system):");
        dumpLocked(pw, "", STATS_LAST, -1);
        pw.println("");
        pw.println("Current Battery Statistics (Currently running system):");
        dumpLocked(pw, "", STATS_CURRENT, -1);
        pw.println("");
        pw.println("Unplugged Statistics (Since last unplugged from power):");
        dumpLocked(pw, "", STATS_UNPLUGGED, -1);
    }
    
    @SuppressWarnings("unused")
    public void dumpCheckinLocked(PrintWriter pw, String[] args) {
        boolean isUnpluggedOnly = false;
        
        for (String arg : args) {
            if ("-u".equals(arg)) {
                if (LOCAL_LOGV) Log.v("BatteryStats", "Dumping unplugged data");
                isUnpluggedOnly = true;
            }
        }
        
        if (isUnpluggedOnly) {
            dumpCheckinLocked(pw, STATS_UNPLUGGED, -1);
        }
        else {
            dumpCheckinLocked(pw, STATS_TOTAL, -1);
            dumpCheckinLocked(pw, STATS_LAST, -1);
            dumpCheckinLocked(pw, STATS_UNPLUGGED, -1);
            dumpCheckinLocked(pw, STATS_CURRENT, -1);
        }
    }
    
}

Other Android examples (source code examples)

Here is a short list of links related to this Android BatteryStats.java source code file:

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