| /* |
| * Copyright (C) 2006 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; |
| |
| import com.android.internal.app.IBatteryStats; |
| import com.android.server.am.BatteryStatsService; |
| |
| import android.app.ActivityManagerNative; |
| import android.content.ContentResolver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.pm.PackageManager; |
| import android.os.BatteryManager; |
| import android.os.Binder; |
| import android.os.IBinder; |
| import android.os.DropBoxManager; |
| import android.os.RemoteException; |
| import android.os.ServiceManager; |
| import android.os.SystemClock; |
| import android.os.UEventObserver; |
| import android.provider.Settings; |
| import android.util.EventLog; |
| import android.util.Slog; |
| |
| import java.io.File; |
| import java.io.FileDescriptor; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| |
| |
| /** |
| * <p>BatteryService monitors the charging status, and charge level of the device |
| * battery. When these values change this service broadcasts the new values |
| * to all {@link android.content.BroadcastReceiver IntentReceivers} that are |
| * watching the {@link android.content.Intent#ACTION_BATTERY_CHANGED |
| * BATTERY_CHANGED} action.</p> |
| * <p>The new values are stored in the Intent data and can be retrieved by |
| * calling {@link android.content.Intent#getExtra Intent.getExtra} with the |
| * following keys:</p> |
| * <p>"scale" - int, the maximum value for the charge level</p> |
| * <p>"level" - int, charge level, from 0 through "scale" inclusive</p> |
| * <p>"status" - String, the current charging status.<br /> |
| * <p>"health" - String, the current battery health.<br /> |
| * <p>"present" - boolean, true if the battery is present<br /> |
| * <p>"icon-small" - int, suggested small icon to use for this state</p> |
| * <p>"plugged" - int, 0 if the device is not plugged in; 1 if plugged |
| * into an AC power adapter; 2 if plugged in via USB.</p> |
| * <p>"voltage" - int, current battery voltage in millivolts</p> |
| * <p>"temperature" - int, current battery temperature in tenths of |
| * a degree Centigrade</p> |
| * <p>"technology" - String, the type of battery installed, e.g. "Li-ion"</p> |
| */ |
| class BatteryService extends Binder { |
| private static final String TAG = BatteryService.class.getSimpleName(); |
| |
| private static final boolean LOCAL_LOGV = false; |
| |
| static final int BATTERY_SCALE = 100; // battery capacity is a percentage |
| |
| // Used locally for determining when to make a last ditch effort to log |
| // discharge stats before the device dies. |
| private static final int CRITICAL_BATTERY_LEVEL = 4; |
| |
| private static final int DUMP_MAX_LENGTH = 24 * 1024; |
| private static final String[] DUMPSYS_ARGS = new String[] { "--checkin", "-u" }; |
| private static final String BATTERY_STATS_SERVICE_NAME = "batteryinfo"; |
| |
| private static final String DUMPSYS_DATA_PATH = "/data/system/"; |
| |
| // This should probably be exposed in the API, though it's not critical |
| private static final int BATTERY_PLUGGED_NONE = 0; |
| |
| private final Context mContext; |
| private final IBatteryStats mBatteryStats; |
| |
| private boolean mAcOnline; |
| private boolean mUsbOnline; |
| private int mBatteryStatus; |
| private int mBatteryHealth; |
| private boolean mBatteryPresent; |
| private int mBatteryLevel; |
| private int mBatteryVoltage; |
| private int mBatteryTemperature; |
| private String mBatteryTechnology; |
| private boolean mBatteryLevelCritical; |
| |
| private int mLastBatteryStatus; |
| private int mLastBatteryHealth; |
| private boolean mLastBatteryPresent; |
| private int mLastBatteryLevel; |
| private int mLastBatteryVoltage; |
| private int mLastBatteryTemperature; |
| private boolean mLastBatteryLevelCritical; |
| |
| private int mLowBatteryWarningLevel; |
| private int mLowBatteryCloseWarningLevel; |
| |
| private int mPlugType; |
| private int mLastPlugType = -1; // Extra state so we can detect first run |
| |
| private long mDischargeStartTime; |
| private int mDischargeStartLevel; |
| |
| private boolean mSentLowBatteryBroadcast = false; |
| |
| public BatteryService(Context context) { |
| mContext = context; |
| mBatteryStats = BatteryStatsService.getService(); |
| |
| mLowBatteryWarningLevel = mContext.getResources().getInteger( |
| com.android.internal.R.integer.config_lowBatteryWarningLevel); |
| mLowBatteryCloseWarningLevel = mContext.getResources().getInteger( |
| com.android.internal.R.integer.config_lowBatteryCloseWarningLevel); |
| |
| mUEventObserver.startObserving("SUBSYSTEM=power_supply"); |
| |
| // set initial status |
| update(); |
| } |
| |
| final boolean isPowered() { |
| // assume we are powered if battery state is unknown so the "stay on while plugged in" option will work. |
| return (mAcOnline || mUsbOnline || mBatteryStatus == BatteryManager.BATTERY_STATUS_UNKNOWN); |
| } |
| |
| final boolean isPowered(int plugTypeSet) { |
| // assume we are powered if battery state is unknown so |
| // the "stay on while plugged in" option will work. |
| if (mBatteryStatus == BatteryManager.BATTERY_STATUS_UNKNOWN) { |
| return true; |
| } |
| if (plugTypeSet == 0) { |
| return false; |
| } |
| int plugTypeBit = 0; |
| if (mAcOnline) { |
| plugTypeBit |= BatteryManager.BATTERY_PLUGGED_AC; |
| } |
| if (mUsbOnline) { |
| plugTypeBit |= BatteryManager.BATTERY_PLUGGED_USB; |
| } |
| return (plugTypeSet & plugTypeBit) != 0; |
| } |
| |
| final int getPlugType() { |
| return mPlugType; |
| } |
| |
| private UEventObserver mUEventObserver = new UEventObserver() { |
| @Override |
| public void onUEvent(UEventObserver.UEvent event) { |
| update(); |
| } |
| }; |
| |
| // returns battery level as a percentage |
| final int getBatteryLevel() { |
| return mBatteryLevel; |
| } |
| |
| void systemReady() { |
| // check our power situation now that it is safe to display the shutdown dialog. |
| shutdownIfNoPower(); |
| shutdownIfOverTemp(); |
| } |
| |
| private final void shutdownIfNoPower() { |
| // shut down gracefully if our battery is critically low and we are not powered. |
| // wait until the system has booted before attempting to display the shutdown dialog. |
| if (mBatteryLevel == 0 && !isPowered() && ActivityManagerNative.isSystemReady()) { |
| Intent intent = new Intent(Intent.ACTION_REQUEST_SHUTDOWN); |
| intent.putExtra(Intent.EXTRA_KEY_CONFIRM, false); |
| intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); |
| mContext.startActivity(intent); |
| } |
| } |
| |
| private final void shutdownIfOverTemp() { |
| // shut down gracefully if temperature is too high (> 68.0C) |
| // wait until the system has booted before attempting to display the shutdown dialog. |
| if (mBatteryTemperature > 680 && ActivityManagerNative.isSystemReady()) { |
| Intent intent = new Intent(Intent.ACTION_REQUEST_SHUTDOWN); |
| intent.putExtra(Intent.EXTRA_KEY_CONFIRM, false); |
| intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); |
| mContext.startActivity(intent); |
| } |
| } |
| |
| private native void native_update(); |
| |
| private synchronized final void update() { |
| native_update(); |
| |
| boolean logOutlier = false; |
| long dischargeDuration = 0; |
| |
| shutdownIfNoPower(); |
| shutdownIfOverTemp(); |
| |
| mBatteryLevelCritical = mBatteryLevel <= CRITICAL_BATTERY_LEVEL; |
| if (mAcOnline) { |
| mPlugType = BatteryManager.BATTERY_PLUGGED_AC; |
| } else if (mUsbOnline) { |
| mPlugType = BatteryManager.BATTERY_PLUGGED_USB; |
| } else { |
| mPlugType = BATTERY_PLUGGED_NONE; |
| } |
| if (mBatteryStatus != mLastBatteryStatus || |
| mBatteryHealth != mLastBatteryHealth || |
| mBatteryPresent != mLastBatteryPresent || |
| mBatteryLevel != mLastBatteryLevel || |
| mPlugType != mLastPlugType || |
| mBatteryVoltage != mLastBatteryVoltage || |
| mBatteryTemperature != mLastBatteryTemperature) { |
| |
| if (mPlugType != mLastPlugType) { |
| if (mLastPlugType == BATTERY_PLUGGED_NONE) { |
| // discharging -> charging |
| |
| // There's no value in this data unless we've discharged at least once and the |
| // battery level has changed; so don't log until it does. |
| if (mDischargeStartTime != 0 && mDischargeStartLevel != mBatteryLevel) { |
| dischargeDuration = SystemClock.elapsedRealtime() - mDischargeStartTime; |
| logOutlier = true; |
| EventLog.writeEvent(EventLogTags.BATTERY_DISCHARGE, dischargeDuration, |
| mDischargeStartLevel, mBatteryLevel); |
| // make sure we see a discharge event before logging again |
| mDischargeStartTime = 0; |
| } |
| } else if (mPlugType == BATTERY_PLUGGED_NONE) { |
| // charging -> discharging or we just powered up |
| mDischargeStartTime = SystemClock.elapsedRealtime(); |
| mDischargeStartLevel = mBatteryLevel; |
| } |
| } |
| if (mBatteryStatus != mLastBatteryStatus || |
| mBatteryHealth != mLastBatteryHealth || |
| mBatteryPresent != mLastBatteryPresent || |
| mPlugType != mLastPlugType) { |
| EventLog.writeEvent(EventLogTags.BATTERY_STATUS, |
| mBatteryStatus, mBatteryHealth, mBatteryPresent ? 1 : 0, |
| mPlugType, mBatteryTechnology); |
| } |
| if (mBatteryLevel != mLastBatteryLevel || |
| mBatteryVoltage != mLastBatteryVoltage || |
| mBatteryTemperature != mLastBatteryTemperature) { |
| EventLog.writeEvent(EventLogTags.BATTERY_LEVEL, |
| mBatteryLevel, mBatteryVoltage, mBatteryTemperature); |
| } |
| if (mBatteryLevel != mLastBatteryLevel && mPlugType == BATTERY_PLUGGED_NONE) { |
| // If the battery level has changed and we are on battery, update the current level. |
| // This is used for discharge cycle tracking so this shouldn't be updated while the |
| // battery is charging. |
| try { |
| mBatteryStats.recordCurrentLevel(mBatteryLevel); |
| } catch (RemoteException e) { |
| // Should never happen. |
| } |
| } |
| if (mBatteryLevelCritical && !mLastBatteryLevelCritical && |
| mPlugType == BATTERY_PLUGGED_NONE) { |
| // We want to make sure we log discharge cycle outliers |
| // if the battery is about to die. |
| dischargeDuration = SystemClock.elapsedRealtime() - mDischargeStartTime; |
| logOutlier = true; |
| } |
| |
| final boolean plugged = mPlugType != BATTERY_PLUGGED_NONE; |
| final boolean oldPlugged = mLastPlugType != BATTERY_PLUGGED_NONE; |
| |
| /* The ACTION_BATTERY_LOW broadcast is sent in these situations: |
| * - is just un-plugged (previously was plugged) and battery level is |
| * less than or equal to WARNING, or |
| * - is not plugged and battery level falls to WARNING boundary |
| * (becomes <= mLowBatteryWarningLevel). |
| */ |
| final boolean sendBatteryLow = !plugged |
| && mBatteryStatus != BatteryManager.BATTERY_STATUS_UNKNOWN |
| && mBatteryLevel <= mLowBatteryWarningLevel |
| && (oldPlugged || mLastBatteryLevel > mLowBatteryWarningLevel); |
| |
| sendIntent(); |
| |
| // Separate broadcast is sent for power connected / not connected |
| // since the standard intent will not wake any applications and some |
| // applications may want to have smart behavior based on this. |
| Intent statusIntent = new Intent(); |
| statusIntent.setFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); |
| if (mPlugType != 0 && mLastPlugType == 0) { |
| statusIntent.setAction(Intent.ACTION_POWER_CONNECTED); |
| mContext.sendBroadcast(statusIntent); |
| } |
| else if (mPlugType == 0 && mLastPlugType != 0) { |
| statusIntent.setAction(Intent.ACTION_POWER_DISCONNECTED); |
| mContext.sendBroadcast(statusIntent); |
| } |
| |
| if (sendBatteryLow) { |
| mSentLowBatteryBroadcast = true; |
| statusIntent.setAction(Intent.ACTION_BATTERY_LOW); |
| mContext.sendBroadcast(statusIntent); |
| } else if (mSentLowBatteryBroadcast && mLastBatteryLevel >= mLowBatteryCloseWarningLevel) { |
| mSentLowBatteryBroadcast = false; |
| statusIntent.setAction(Intent.ACTION_BATTERY_OKAY); |
| mContext.sendBroadcast(statusIntent); |
| } |
| |
| // This needs to be done after sendIntent() so that we get the lastest battery stats. |
| if (logOutlier && dischargeDuration != 0) { |
| logOutlier(dischargeDuration); |
| } |
| |
| mLastBatteryStatus = mBatteryStatus; |
| mLastBatteryHealth = mBatteryHealth; |
| mLastBatteryPresent = mBatteryPresent; |
| mLastBatteryLevel = mBatteryLevel; |
| mLastPlugType = mPlugType; |
| mLastBatteryVoltage = mBatteryVoltage; |
| mLastBatteryTemperature = mBatteryTemperature; |
| mLastBatteryLevelCritical = mBatteryLevelCritical; |
| } |
| } |
| |
| private final void sendIntent() { |
| // Pack up the values and broadcast them to everyone |
| Intent intent = new Intent(Intent.ACTION_BATTERY_CHANGED); |
| intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY |
| | Intent.FLAG_RECEIVER_REPLACE_PENDING); |
| try { |
| mBatteryStats.setOnBattery(mPlugType == BATTERY_PLUGGED_NONE, mBatteryLevel); |
| } catch (RemoteException e) { |
| // Should never happen. |
| } |
| |
| int icon = getIcon(mBatteryLevel); |
| |
| intent.putExtra(BatteryManager.EXTRA_STATUS, mBatteryStatus); |
| intent.putExtra(BatteryManager.EXTRA_HEALTH, mBatteryHealth); |
| intent.putExtra(BatteryManager.EXTRA_PRESENT, mBatteryPresent); |
| intent.putExtra(BatteryManager.EXTRA_LEVEL, mBatteryLevel); |
| intent.putExtra(BatteryManager.EXTRA_SCALE, BATTERY_SCALE); |
| intent.putExtra(BatteryManager.EXTRA_ICON_SMALL, icon); |
| intent.putExtra(BatteryManager.EXTRA_PLUGGED, mPlugType); |
| intent.putExtra(BatteryManager.EXTRA_VOLTAGE, mBatteryVoltage); |
| intent.putExtra(BatteryManager.EXTRA_TEMPERATURE, mBatteryTemperature); |
| intent.putExtra(BatteryManager.EXTRA_TECHNOLOGY, mBatteryTechnology); |
| |
| if (false) { |
| Slog.d(TAG, "updateBattery level:" + mBatteryLevel + |
| " scale:" + BATTERY_SCALE + " status:" + mBatteryStatus + |
| " health:" + mBatteryHealth + " present:" + mBatteryPresent + |
| " voltage: " + mBatteryVoltage + |
| " temperature: " + mBatteryTemperature + |
| " technology: " + mBatteryTechnology + |
| " AC powered:" + mAcOnline + " USB powered:" + mUsbOnline + |
| " icon:" + icon ); |
| } |
| |
| ActivityManagerNative.broadcastStickyIntent(intent, null); |
| } |
| |
| private final void logBatteryStats() { |
| IBinder batteryInfoService = ServiceManager.getService(BATTERY_STATS_SERVICE_NAME); |
| if (batteryInfoService == null) return; |
| |
| DropBoxManager db = (DropBoxManager) mContext.getSystemService(Context.DROPBOX_SERVICE); |
| if (db == null || !db.isTagEnabled("BATTERY_DISCHARGE_INFO")) return; |
| |
| File dumpFile = null; |
| FileOutputStream dumpStream = null; |
| try { |
| // dump the service to a file |
| dumpFile = new File(DUMPSYS_DATA_PATH + BATTERY_STATS_SERVICE_NAME + ".dump"); |
| dumpStream = new FileOutputStream(dumpFile); |
| batteryInfoService.dump(dumpStream.getFD(), DUMPSYS_ARGS); |
| dumpStream.getFD().sync(); |
| |
| // add dump file to drop box |
| db.addFile("BATTERY_DISCHARGE_INFO", dumpFile, DropBoxManager.IS_TEXT); |
| } catch (RemoteException e) { |
| Slog.e(TAG, "failed to dump battery service", e); |
| } catch (IOException e) { |
| Slog.e(TAG, "failed to write dumpsys file", e); |
| } finally { |
| // make sure we clean up |
| if (dumpStream != null) { |
| try { |
| dumpStream.close(); |
| } catch (IOException e) { |
| Slog.e(TAG, "failed to close dumpsys output stream"); |
| } |
| } |
| if (dumpFile != null && !dumpFile.delete()) { |
| Slog.e(TAG, "failed to delete temporary dumpsys file: " |
| + dumpFile.getAbsolutePath()); |
| } |
| } |
| } |
| |
| private final void logOutlier(long duration) { |
| ContentResolver cr = mContext.getContentResolver(); |
| String dischargeThresholdString = Settings.Secure.getString(cr, |
| Settings.Secure.BATTERY_DISCHARGE_THRESHOLD); |
| String durationThresholdString = Settings.Secure.getString(cr, |
| Settings.Secure.BATTERY_DISCHARGE_DURATION_THRESHOLD); |
| |
| if (dischargeThresholdString != null && durationThresholdString != null) { |
| try { |
| long durationThreshold = Long.parseLong(durationThresholdString); |
| int dischargeThreshold = Integer.parseInt(dischargeThresholdString); |
| if (duration <= durationThreshold && |
| mDischargeStartLevel - mBatteryLevel >= dischargeThreshold) { |
| // If the discharge cycle is bad enough we want to know about it. |
| logBatteryStats(); |
| } |
| if (LOCAL_LOGV) Slog.v(TAG, "duration threshold: " + durationThreshold + |
| " discharge threshold: " + dischargeThreshold); |
| if (LOCAL_LOGV) Slog.v(TAG, "duration: " + duration + " discharge: " + |
| (mDischargeStartLevel - mBatteryLevel)); |
| } catch (NumberFormatException e) { |
| Slog.e(TAG, "Invalid DischargeThresholds GService string: " + |
| durationThresholdString + " or " + dischargeThresholdString); |
| return; |
| } |
| } |
| } |
| |
| private final int getIcon(int level) { |
| if (mBatteryStatus == BatteryManager.BATTERY_STATUS_CHARGING) { |
| return com.android.internal.R.drawable.stat_sys_battery_charge; |
| } else if (mBatteryStatus == BatteryManager.BATTERY_STATUS_DISCHARGING || |
| mBatteryStatus == BatteryManager.BATTERY_STATUS_NOT_CHARGING || |
| mBatteryStatus == BatteryManager.BATTERY_STATUS_FULL) { |
| return com.android.internal.R.drawable.stat_sys_battery; |
| } else { |
| return com.android.internal.R.drawable.stat_sys_battery_unknown; |
| } |
| } |
| |
| @Override |
| protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) |
| != PackageManager.PERMISSION_GRANTED) { |
| |
| pw.println("Permission Denial: can't dump Battery service from from pid=" |
| + Binder.getCallingPid() |
| + ", uid=" + Binder.getCallingUid()); |
| return; |
| } |
| |
| synchronized (this) { |
| pw.println("Current Battery Service state:"); |
| pw.println(" AC powered: " + mAcOnline); |
| pw.println(" USB powered: " + mUsbOnline); |
| pw.println(" status: " + mBatteryStatus); |
| pw.println(" health: " + mBatteryHealth); |
| pw.println(" present: " + mBatteryPresent); |
| pw.println(" level: " + mBatteryLevel); |
| pw.println(" scale: " + BATTERY_SCALE); |
| pw.println(" voltage:" + mBatteryVoltage); |
| pw.println(" temperature: " + mBatteryTemperature); |
| pw.println(" technology: " + mBatteryTechnology); |
| } |
| } |
| } |
