Android example source code file (BatteryStatsService.java)

This example Android source code file (BatteryStatsService.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, app, batterystatsimpl, batterystatsservice, bluetoothheadset, content, context, ibatterystats, ibinder, io, os, override, parcel, printwriter, string, telephony, writing

The BatteryStatsService.java Android example source code

/*
 * Copyright (C) 2006-2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.server.am;

import android.bluetooth.BluetoothHeadset;
import android.content.Context;
import android.os.Binder;
import android.os.IBinder;
import android.os.Parcel;
import android.os.Process;
import android.os.ServiceManager;
import android.telephony.SignalStrength;
import android.util.Slog;

import com.android.internal.app.IBatteryStats;
import com.android.internal.os.BatteryStatsImpl;
import com.android.internal.os.PowerProfile;

import java.io.FileDescriptor;
import java.io.PrintWriter;

/**
 * All information we are collecting about things that can happen that impact
 * battery life.
 */
public final class BatteryStatsService extends IBatteryStats.Stub {
    static IBatteryStats sService;
    
    final BatteryStatsImpl mStats;
    Context mContext;

    BatteryStatsService(String filename) {
        mStats = new BatteryStatsImpl(filename);
    }
    
    public void publish(Context context) {
        mContext = context;
        ServiceManager.addService("batteryinfo", asBinder());
        mStats.setNumSpeedSteps(new PowerProfile(mContext).getNumSpeedSteps());
        mStats.setRadioScanningTimeout(mContext.getResources().getInteger(
                com.android.internal.R.integer.config_radioScanningTimeout)
                * 1000L);
    }
    
    public void shutdown() {
        Slog.w("BatteryStats", "Writing battery stats before shutdown...");
        synchronized (mStats) {
            mStats.writeLocked();
        }
    }
    
    public static IBatteryStats getService() {
        if (sService != null) {
            return sService;
        }
        IBinder b = ServiceManager.getService("batteryinfo");
        sService = asInterface(b);
        return sService;
    }
    
    /**
     * @return the current statistics object, which may be modified
     * to reflect events that affect battery usage.  You must lock the
     * stats object before doing anything with it.
     */
    public BatteryStatsImpl getActiveStatistics() {
        return mStats;
    }
    
    public byte[] getStatistics() {
        mContext.enforceCallingPermission(
                android.Manifest.permission.BATTERY_STATS, null);
        //Slog.i("foo", "SENDING BATTERY INFO:");
        //mStats.dumpLocked(new LogPrinter(Log.INFO, "foo", Log.LOG_ID_SYSTEM));
        Parcel out = Parcel.obtain();
        mStats.writeToParcel(out, 0);
        byte[] data = out.marshall();
        out.recycle();
        return data;
    }
    
    public void noteStartWakelock(int uid, String name, int type) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.getUidStatsLocked(uid).noteStartWakeLocked(name, type);
        }
    }

    public void noteStopWakelock(int uid, String name, int type) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.getUidStatsLocked(uid).noteStopWakeLocked(name, type);
        }
    }

    public void noteStartSensor(int uid, int sensor) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.getUidStatsLocked(uid).noteStartSensor(sensor);
        }
    }
    
    public void noteStopSensor(int uid, int sensor) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.getUidStatsLocked(uid).noteStopSensor(sensor);
        }
    }
    
    public void noteStartGps(int uid) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.noteStartGps(uid);
        }
    }
    
    public void noteStopGps(int uid) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.noteStopGps(uid);
        }
    }
        
    public void noteScreenOn() {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.noteScreenOnLocked();
        }
    }
    
    public void noteScreenBrightness(int brightness) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.noteScreenBrightnessLocked(brightness);
        }
    }
    
    public void noteScreenOff() {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.noteScreenOffLocked();
        }
    }

    public void noteInputEvent() {
        enforceCallingPermission();
        mStats.noteInputEventAtomic();
    }
    
    public void noteUserActivity(int uid, int event) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.noteUserActivityLocked(uid, event);
        }
    }
    
    public void notePhoneOn() {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.notePhoneOnLocked();
        }
    }
    
    public void notePhoneOff() {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.notePhoneOffLocked();
        }
    }
    
    public void notePhoneSignalStrength(SignalStrength signalStrength) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.notePhoneSignalStrengthLocked(signalStrength);
        }
    }
    
    public void notePhoneDataConnectionState(int dataType, boolean hasData) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.notePhoneDataConnectionStateLocked(dataType, hasData);
        }
    }

    public void notePhoneState(int state) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.notePhoneStateLocked(state);
        }
    }

    public void noteWifiOn(int uid) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.noteWifiOnLocked(uid);
        }
    }
    
    public void noteWifiOff(int uid) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.noteWifiOffLocked(uid);
        }
    }

    public void noteStartAudio(int uid) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.noteAudioOnLocked(uid);
        }
    }

    public void noteStopAudio(int uid) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.noteAudioOffLocked(uid);
        }
    }

    public void noteStartVideo(int uid) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.noteVideoOnLocked(uid);
        }
    }

    public void noteStopVideo(int uid) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.noteVideoOffLocked(uid);
        }
    }

    public void noteWifiRunning() {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.noteWifiRunningLocked();
        }
    }

    public void noteWifiStopped() {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.noteWifiStoppedLocked();
        }
    }

    public void noteBluetoothOn() {
        enforceCallingPermission();
        BluetoothHeadset headset = new BluetoothHeadset(mContext, null);
        synchronized (mStats) {
            mStats.noteBluetoothOnLocked();
            mStats.setBtHeadset(headset);
        }
    }
    
    public void noteBluetoothOff() {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.noteBluetoothOffLocked();
        }
    }
    
    public void noteFullWifiLockAcquired(int uid) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.noteFullWifiLockAcquiredLocked(uid);
        }
    }
    
    public void noteFullWifiLockReleased(int uid) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.noteFullWifiLockReleasedLocked(uid);
        }
    }
    
    public void noteScanWifiLockAcquired(int uid) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.noteScanWifiLockAcquiredLocked(uid);
        }
    }
    
    public void noteScanWifiLockReleased(int uid) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.noteScanWifiLockReleasedLocked(uid);
        }
    }

    public void noteWifiMulticastEnabled(int uid) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.noteWifiMulticastEnabledLocked(uid);
        }
    }

    public void noteWifiMulticastDisabled(int uid) {
        enforceCallingPermission();
        synchronized (mStats) {
            mStats.noteWifiMulticastDisabledLocked(uid);
        }
    }

    public boolean isOnBattery() {
        return mStats.isOnBattery();
    }
    
    public void setOnBattery(boolean onBattery, int level) {
        enforceCallingPermission();
        mStats.setOnBattery(onBattery, level);
    }
    
    public void recordCurrentLevel(int level) {
        enforceCallingPermission();
        mStats.recordCurrentLevel(level);
    }
    
    public long getAwakeTimeBattery() {
        mContext.enforceCallingOrSelfPermission(
                android.Manifest.permission.BATTERY_STATS, null);
        return mStats.getAwakeTimeBattery();
    }

    public long getAwakeTimePlugged() {
        mContext.enforceCallingOrSelfPermission(
                android.Manifest.permission.BATTERY_STATS, null);
        return mStats.getAwakeTimePlugged();
    }

    public void enforceCallingPermission() {
        if (Binder.getCallingPid() == Process.myPid()) {
            return;
        }
        mContext.enforcePermission(android.Manifest.permission.UPDATE_DEVICE_STATS,
                Binder.getCallingPid(), Binder.getCallingUid(), null);
    }
    
    @Override
    protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
        synchronized (mStats) {
            boolean isCheckin = false;
            if (args != null) {
                for (String arg : args) {
                    if ("--checkin".equals(arg)) {
                        isCheckin = true;
                        break;
                    }
                }
            }
            if (isCheckin) mStats.dumpCheckinLocked(pw, args);
            else mStats.dumpLocked(pw);
        }
    }
}