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Android中电池信息(Battery information)的取得

2010-08-20 14:28 330 查看

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)

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001	package com.adakoda.batterytest;

003	import android.app.Activity;

004	import android.content.BroadcastReceiver;

005	import android.content.Context;

006	import android.content.Intent;

007	import android.content.IntentFilter;

008	import android.os.BatteryManager;

009	import android.os.Bundle;

010	import android.util.Log;

012	public class BatteryTestActivity extends Activity {

013	/** Called when the activity is first created. */

@Override

015	public void onCreate(Bundle savedInstanceState) {

016	super .onCreate(savedInstanceState);

017	setContentView(R.layout.main);

@Override

021	protected void onResume() {

022	super .onResume();

024	IntentFilter filter = new IntentFilter();

026	filter.addAction(Intent.ACTION_BATTERY_CHANGED);

027	registerReceiver(mBroadcastReceiver,filter);

@Override

031	protected void onPause() {

032	super .onPause();

034	unregisterReceiver(mBroadcastReceiver);

037	private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {

@Override

039	public void onReceive(Context context,Intent intent) {

040	String action = intent.getAction();

041	if (action.equals(Intent.ACTION_BATTERY_CHANGED)) {

042	int status = intent.getIntExtra( "status" , 0 );

043	int health = intent.getIntExtra( "health" , 0 );

044	boolean present = intent.getBooleanExtra( "present" , false );

045	int level = intent.getIntExtra( "level" , 0 );

046	int scale = intent.getIntExtra( "scale" , 0 );

047	int icon_small = intent.getIntExtra( "icon-small" , 0 );

048	int plugged = intent.getIntExtra( "plugged" , 0 );

049	int voltage = intent.getIntExtra( "voltage" , 0 );

050	int temperature = intent.getIntExtra( "temperature" , 0 );

051	String technology = intent.getStringExtra( "technology" );

053	String statusString = "" ;

055	switch (status) {

056	case BatteryManager.BATTERY_STATUS_UNKNOWN:

057	statusString = "unknown" ;

058	break ;

059	case BatteryManager.BATTERY_STATUS_CHARGING:

060	statusString = "charging" ;

061	break ;

062	case BatteryManager.BATTERY_STATUS_DISCHARGING:

063	statusString = "discharging" ;

064	break ;

065	case BatteryManager.BATTERY_STATUS_NOT_CHARGING:

066	statusString = "not charging" ;

067	break ;

068	case BatteryManager.BATTERY_STATUS_FULL:

069	statusString = "full" ;

070	break ;

073	String healthString = "" ;

075	switch (health) {

076	case BatteryManager.BATTERY_HEALTH_UNKNOWN:

077	healthString = "unknown" ;

078	break ;

079	case BatteryManager.BATTERY_HEALTH_GOOD:

080	healthString = "good" ;

081	break ;

082	case BatteryManager.BATTERY_HEALTH_OVERHEAT:

083	healthString = "overheat" ;

084	break ;

085	case BatteryManager.BATTERY_HEALTH_DEAD:

086	healthString = "dead" ;

087	break ;

088	case BatteryManager.BATTERY_HEALTH_OVER_VOLTAGE:

089	healthString = "voltage" ;

090	break ;

091	case BatteryManager.BATTERY_HEALTH_UNSPECIFIED_FAILURE:

092	healthString = "unspecified failure" ;

093	break ;

096	String acString = "" ;

098	switch (plugged) {

099	case BatteryManager.BATTERY_PLUGGED_AC:

100	acString = "plugged ac" ;

101	break ;

102	case BatteryManager.BATTERY_PLUGGED_USB:

103	acString = "plugged usb" ;

104	break ;

107	Log.v( "status" ,statusString);

108	Log.v( "health" ,healthString);

109	Log.v( "present" ,String.valueOf(present));

110	Log.v( "level" ,String.valueOf(level));

111	Log.v( "scale" ,String.valueOf(scale));

112	Log.v( "icon_small" ,String.valueOf(icon_small));

113	Log.v( "plugged" ,acString);

114	Log.v( "voltage" ,String.valueOf(voltage));

115	Log.v( "temperature" ,String.valueOf(temperature));

116	Log.v( "technology" ,technology);

};

参考资源
● BroadcastReceiver | Android Developers
● BatteryManager | Android Developers

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