Android中电池信息(Battery ination)的取得.doc

Android中电池信息(Battery information)的取得日期：2010-08-23 来源：Linux社区 作者：Linux这里介绍电池信息的取得. Android.content.BroadcastReceiver类 Android.os.BatteryManager类 电池信息的取得，调用registerReceiver()方法。 第1个参数，设置BroadcastReceiver实例 第2个参数，设置追加了Intent.ACTION_BATTERY_CHANGED处理的IntentFilter实例。 在BroadcastReceiver的onReceive()事件，接收到的Intent.ACTION_BATTERY_CHANGED，包括下面的信息。 “status”（int类型）状态，定义值是BatteryManager.BATTERY_STATUS_XXX。 “health”（int类型）健康，定义值是BatteryManager.BATTERY_HEALTH_XXX。 “present”（boolean类型） “level”（int类型）电池剩余容量 “scale”（int类型）电池最大值。通常为100。 “icon-small”（int类型）图标ID。 “plugged”（int类型）连接的电源插座，定义值是BatteryManager.BATTERY_PLUGGED_XXX。 “voltage”（int类型）mV。 “temperature”（int类型）温度，0.1度单位。例如 表示197的时候，意思为19.7度。 “technology”（String类型）电池类型，例如，Li-ion等等。例程源码(Java)package com.adakoda.batterytest;import Android.app.Activity;import Android.content.BroadcastReceiver;import Android.content.Context;import Android.content.Intent;import Android.content.IntentFilter;import Android.os.BatteryManager;import Android.os.Bundle;import Android.util.Log;public class BatteryTestActivity extends Activity /* Called when the activity is first created. */ Override public void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.main); Override protected void onResume() super.onResume(); IntentFilter filter = new IntentFilter(); filter.addAction(Intent.ACTION_BATTERY_CHANGED); registerReceiver(mBroadcastReceiver, filter); Override protected void onPause() super.onPause(); unregisterReceiver(mBroadcastReceiver); private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() Override public void onReceive(Context context, Intent intent) String action = intent.getAction(); if (action.equals(Intent.ACTION_BATTERY_CHANGED) int status = intent.getIntExtra(status, 0); int health = intent.getIntExtra(health, 0); boolean present = intent.getBooleanExtra(present, false); int level = intent.getIntExtra(level, 0); int scale = intent.getIntExtra(scale, 0); int icon_small = intent.getIntExtra(icon-small, 0); int plugged = intent.getIntExtra(plugged, 0); int voltage = intent.getIntExtra(voltage, 0); int temperature = intent.getIntExtra(temperature, 0); String technology = intent.getStringExtra(technology); String statusString = ; switch (status) case BatteryManager.BATTERY_STATUS_UNKNOWN: statusString = unknown; break; case BatteryManager.BATTERY_STATUS_CHARGING: statusString = charging; break; case BatteryManager.BATTERY_STATUS_DISCHARGING: statusString = discharging; break; case BatteryManager.BATTERY_STATUS_NOT_CHARGING: statusString = not charging; break; case BatteryManager.BATTERY_STATUS_FULL: statusString = full; break; String healthString = ; switch (health) case BatteryManager.BATTERY_HEALTH_UNKNOWN: healthString = unknown; break; case BatteryManager.BATTERY_HEALTH_GOOD: healthString = good; break; case BatteryManager.BATTERY_HEALTH_OVERHEAT: healthString = overheat; break; case BatteryManager.BATTERY_HEALTH_DEAD: healthString = dead; break; case BatteryManager.BATTERY_HEALTH_OVER_VOLTAGE: healthString = voltage; break; case BatteryManager.BATTERY_HEALTH_UNSPECIFIED_FAILURE: healthString = unspecified failure; break; String acString = ; switch (plugged) case BatteryManager.BATTERY_PLUGGED_AC: acString = plugged ac; break; case BatteryManager.BATTERY_PLUGGED_USB: acString = plugged usb; break; Log.v(status, statusString); Log.v(health, healthString); Log.v(present, String.valueOf(present); Log.v(level, String.valueOf(level); Log.v(scale, String.valueOf(scale); Log.v(icon_small, String.valueOf(icon_small); Log.v(plugged, acString); Log.v(voltage, String.valueOf(voltage); Log.v(temperature, String.valueOf(temperature); Log.v(technology, technology); ; Android中电池信息(Battery information)的取得 收藏原文地址：/sharp2wing/archive/2010/08/20/5826493.aspx这里介绍电池信息的取得. android.content.BroadcastReceiver类 android.os.BatteryManager类 电池信息的取得，调用registerReceiver()方法。 第1个参数，设置BroadcastReceiver实例 第2个参数，设置追加了Intent.ACTION_BATTERY_CHANGED处理的IntentFilter实例。 在BroadcastReceiver的onReceive()事件，接收到的Intent.ACTION_BATTERY_CHANGED，包括下面的信息。 “status”（int类型）状态，定义值是BatteryManager.BATTERY_STATUS_XXX。 “health”（int类型）健康，定义值是BatteryManager.BATTERY_HEALTH_XXX。 “present”（boolean类型） “level”（int类型）电池剩余容量 “scale”（int类型）电池最大值。通常为100。 “icon-small”（int类型）图标ID。 “plugged”（int类型）连接的电源插座，定义值是BatteryManager.BATTERY_PLUGGED_XXX。 “voltage”（int类型）mV。 “temperature”（int类型）温度，0.1度单位。例如 表示197的时候，意思为19.7度。 “technology”（String类型）电池类型，例如，Li-ion等等。 原创 Android中的 BatteryService 及相关组件 收藏转载时请注明出处和作者联系方式文章出处：/blog作者联系方式：李先静 BatteryService作为电池及充电相关的服务，它的实现非常简单：o 监听UEvent，读取sysfs里中的状态。实现了一个UEvent的观察者。uevent是Linux内核用来向用户空间主动上报事件的机制，对于JAVA程序来说，只实现UEventObserver的虚函数onUEvent，然后注册即可。 private UEventObserver mUEventObserver = new UEventObserver() Override public void onUEvent(UEventObserver.UEvent event) update(); ;这里只关注power_supply的事件：mUEventObserver.startObserving(SUBSYSTEM=power_supply);当有power_supply相关的事件上报时，就会调用update函数。update先调用native_update从sysfs中读取相关状态（com_android_server_BatteryService.cpp）：Linux驱动提供了下列文件，供应用程序获取电源相关状态：#define AC_ONLINE_PATH /sys/class/power_supply/ac/online#define USB_ONLINE_PATH /sys/class/power_supply/usb/online#define BATTERY_STATUS_PATH /sys/class/power_supply/battery/status#define BATTERY_HEALTH_PATH /sys/class/power_supply/battery/health#define BATTERY_PRESENT_PATH /sys/class/power_supply/battery/present#define BATTERY_CAPACITY_PATH /sys/class/power_supply/battery/capacity#define BATTERY_VOLTAGE_PATH /sys/class/power_supply/battery/batt_vol#define BATTERY_TEMPERATURE_PATH /sys/class/power_supply/battery/batt_temp#define BATTERY_TECHNOLOGY_PATH /sys/class/power_supply/battery/technology在DA9034驱动程序阅读笔记(6)一文中，我已经提到drivers/power/micco_power.c里注册了充电器(ac)、 usb和电池(battery)三个power_supply。各个power_supply提供的属性和上述文件是对应的，从这些文件中可以读到充电器 (ac)、usb和电池(battery)三个power_supply的相应状态。update然后根据读到的状态更新BatteryService的成员变量，并广播一个Intent来通知其它关注电源状态的组件。 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); try mBatteryStats.setOnBattery(mPlugType = BATTERY_PLUGGED_NONE, mBatteryLevel); catch (RemoteException e) / Should never happen. int icon = getIcon(mBatteryLevel); intent.putExtra(status, mBatteryStatus); intent.putExtra(health, mBatteryHealth); intent.putExtra(present, mBatteryPresent); intent.putExtra(level, mBatteryLevel); intent.putExtra(scale, BATTERY_SCALE); intent.putExtra(icon-small, icon); intent.putExtra(plugged, mPlugType); intent.putExtra(voltage, mBatteryVoltage); intent.putExtra(temperature, mBatteryTemperature); intent.putExtra(technology, mBatteryTechnology); ActivityManagerNative.broadcastStickyIntent(intent, null); 关注ACTION_BATTERY_CHANGED的地方有好几个：o KeyguardUpdateMonitor 这里主要是用来更新锁屏界面下的电池状态。还有低电警告和关机也是在这里做的。 private void handleBatteryUpdate(int pluggedInStatus, int batteryLevel) if (DEBUG) Log.d(TAG, handleBatteryUpdate); final boolean pluggedIn = isPluggedIn(pluggedInStatus); if (isBatteryUpdateInteresting(pluggedIn, batteryLevel) mBatteryLevel = batteryLevel; mDevicePluggedIn = pluggedIn; for (int i = 0; i = 0 & level = 90); if (batteryCharging != mBatteryCharging | batteryLow != mBatteryLow | batteryFull != mBatteryFull) mBatteryCharging = batteryCharging; mBatteryLow = batteryLow; mBatteryFull = batteryFull; updateLights(); o PowerManagerService 这里主要是做两件事件，先是检查是否在充电时不允许睡眠，并采用相应的行动，其次是触发一个用户行为（会影响下一次睡眠的时间）。 private final class BatteryReceiver extends BroadcastReceiver Override public void onReceive(Context context, Intent intent) synchronized (mLocks) boolean wasPowered = mIsPowered; mIsPowered = mBatteryService.isPowered(); if (mIsPowered != wasPowered) / update mStayOnWhilePluggedIn wake lock updateWakeLockLocked(); / treat plugging and unplugging the devices as a user activity. / users find it disconcerting when they unplug the device / and it shuts off right away. / temporarily set mUserActivityAllowed to true so this will work / even when the keyguard is on. synchronized (mLocks) boolean savedActivityAllowed = mUserActivityAllowed; mUserActivityAllowed = true; userActivity(SystemClock.uptimeMillis(), false); mUserActivityAllowed = savedActivityAllowed; o LocationManagerService 这里似乎没有什么用处，我没找到mCollector赋值的地方。 if (action.equals(Intent.ACTION_BATTERY_CHANGED) log(PowerStateBroadcastReceiver: Battery changed); synchronized (mLocationListeners) int scale = intent.getIntExtra(BATTERY_EXTRA_SCALE, 100); int level = intent.getIntExtra(BATTERY_EXTRA_LEVEL, 0); boolean plugged = intent.getIntExtra(BATTERY_EXTRA_PLUGGED, 0) != 0; / Notify collector battery state if (mCollector != null) mCollector.updateBatteryState(scale, level, plugged); o WifiService 根据电源状态来决定是否需要定时唤醒(没搞得太明白，看Wifi服务时再研究)。if (action.equals(Intent.ACTION_BATTERY_CHANGED) /* * Set a timer to put Wi-Fi to sleep, but only if the screen is off * AND we are transitioning from a state in which the device was supposed * to stay awake to a state in which it is not supposed to stay awake. * If stay awake state is not changing, we do nothing, to avoid resetting * the already-set timer. */ int pluggedType = intent.getIntExtra(plugged, 0); if (mScreenOff & shouldWifiStayAwake(stayAwakeConditions, mPluggedType) & !shouldWifiStayAwake(stayAwakeConditions, pluggedType) long triggerTime = System.currentTimeMillis() + idleMillis; mAlarmManager.set(AlarmManager.RTC_WAKEUP, triggerTime, mIdleIntent); mPluggedType = pluggedType; return; mPluggedType = pluggedType; o StatusBarPolicy 用来更新状态栏上的充电图标。if (action.equals(Intent.ACTION_BATTERY_CHANGED) updateBattery(intent); Android手机电池信息Android 开发技术 2009-08-09 12:22:25 阅读580 评论0 字号：大中小 订阅以下是手机电池的一些信息，很有用的。可以获得手机的好多参数。如电压，手机电量的多少，等等。package com.android.settings; 19 import android.app.Activity; 20 import android.content.BroadcastReceiver; 21 import android.content.Context; 22 import android.content.Intent; 23 import android.content.IntentFilter; 24 import android.os.BatteryManager; 25 import android.os.Bundle; 26 import android.os.Handler; 27 import android.os.IPowerManager; 28 import android.os.Message; 29 import android.os.RemoteException; 30 import android.os.ServiceManager; 31 import android.os.SystemClock; 32 import android.text.format.DateUtils; 33 import android.widget.TextView; 34 35 import ernal.app.IBatteryStats; 36 37 public class BatteryInfo extends Activity 38 private TextView mStatus; 39 private TextView mLevel; 40 private TextView mScale; 41 private TextView mHealth; 42 private TextView mVoltage; 43 private TextView mTemperature; 44 private TextView mTechnology; 45 private TextView mUptime; 46 private IBatteryStats mBatteryStats; 47 private IPowerManager mScreenStats; 48 49 private static final int EVENT_TICK = 1; 50 51 private Handler mHandler = new Handler() 52 Override 53 public void handleMessage(Message msg) 54 switch (msg.what) 55 case EVENT_TICK: 56 updateBatteryStats(); 57 sendEmptyMessageDelayed(EVENT_TICK, 1000); 58 59 break; 60 61 62 ; 63 64 /* 65 * Format a number of tenths-units as a decimal string without using a 66 * conversion to float. E.g. 347 - 34.7 67 */ 68 private final String tenthsToFixedString(int x) 69 int tens = x / 10; 70 return new String( + tens + . + (x - 10*tens); 71 72 73 /* 74 *Listens for intent broadcasts 75 */ 76 private IntentFilter mIntentFilter; 77 78 private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() 79 Override 80 public void onReceive(Context context, Intent intent) 81 String action = intent.getAction(); 82 if (action.equals(Intent.ACTION_BATTERY_CHANGED) 83 int plugType = intent.getIntExtra(plugged, 0); 84 85 mLevel.setText( + intent.getIntExtra(level, 0); 86 mScale.setText( + intent.getIntExtra(scale, 0); 87 mVoltage.setText( + intent.getIntExtra(voltage, 0) + 88 + getString(R.string.battery_info_voltage_units); 89 mTemperature.setText( + tenthsToFixedString(intent.getIntExtra(temperature, 0) 90 + getString(R.string.battery_info_temperature_units); 91 mTechnology.setText( + intent.getStringExtra(technology); 92 93 int status = intent.getIntExtra(status, BatteryManager.BATTERY_STATUS_UNKNOWN); 94 String statusString; 95 if (status = BatteryManager.BATTERY_STATUS_CHARGING) 96 statusString = getString(R.string.battery_info_status_charging); 97 if (plugType 0) 98 statusString = statusString + + getString( 99 (plugType = BatteryManager.BATTERY_PLUGGED_AC) 100 ? R.string.battery_info_status_charging_ac 101 : R.string.battery_info_status_charging_usb); 102 103 else if (status = BatteryManager.BATTERY_STATUS_DISCHARGIN