Android如何得到电量、温度、电压

开发环境
Window 7
Eclipse helios

MB525 defy  Android 2.1-update1

羽化博客的第三篇，由于这个星期兄弟过来玩，所以决定选个简单的程序来写博客，Android技术群里面也有人问过，网上资料也很多，原来写这个程序目的就是随便试试，这次一切从简吧~ ~好了 送上程序代码：
 
com.LB里面主程序Battery代码：package com.LB;

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.widget.TextView;

public class Battery extends Activity
{
private int BatteryN; //目前电量
private int BatteryV; //电池电压
private double BatteryT; //电池温度
private String BatteryStatus; //电池状态
private String BatteryTemp; //电池使用情况

public TextView TV;

@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

// 注册一个系统 BroadcastReceiver，作为访问电池计量之用这个不能直接在AndroidManifest.xml中注册
registerReceiver(mBatInfoReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));

TV = (TextView)findViewById(R.id.TV);

}

/* 创建广播接收器 */
private BroadcastReceiver mBatInfoReceiver = new BroadcastReceiver()
{
public void onReceive(Context context, Intent intent)
{
String action = intent.getAction();
/*
* 如果捕捉到的action是ACTION_BATTERY_CHANGED， 就运行onBatteryInfoReceiver()
*/
if (Intent.ACTION_BATTERY_CHANGED.equals(action))
{
BatteryN = intent.getIntExtra("level", 0); //目前电量
BatteryV = intent.getIntExtra("voltage", 0); //电池电压
BatteryT = intent.getIntExtra("temperature", 0); //电池温度

switch (intent.getIntExtra("status", BatteryManager.BATTERY_STATUS_UNKNOWN))
{
case BatteryManager.BATTERY_STATUS_CHARGING:
BatteryStatus = "充电状态";
break;
case BatteryManager.BATTERY_STATUS_DISCHARGING:
BatteryStatus = "放电状态";
break;
case BatteryManager.BATTERY_STATUS_NOT_CHARGING:
BatteryStatus = "未充电";
break;
case BatteryManager.BATTERY_STATUS_FULL:
BatteryStatus = "充满电";
break;
case BatteryManager.BATTERY_STATUS_UNKNOWN:
BatteryStatus = "未知道状态";
break;
}

switch (intent.getIntExtra("health", BatteryManager.BATTERY_HEALTH_UNKNOWN))
{
case BatteryManager.BATTERY_HEALTH_UNKNOWN:
BatteryTemp = "未知错误";
break;
case BatteryManager.BATTERY_HEALTH_GOOD:
BatteryTemp = "状态良好";
break;
case BatteryManager.BATTERY_HEALTH_DEAD:
BatteryTemp = "电池没有电";
break;
case BatteryManager.BATTERY_HEALTH_OVER_VOLTAGE:
BatteryTemp = "电池电压过高";
break;
case BatteryManager.BATTERY_HEALTH_OVERHEAT:
BatteryTemp = "电池过热";
break;
}
TV.setText("目前电量为" + BatteryN + "% --- " + BatteryStatus + "\n" + "电压为" + BatteryV + "mV --- " + BatteryTemp + "\n" + "温度为" + (BatteryT*0.1) + "℃");
}
}
};
}

layout的xml代码<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:id = "@+id/TV"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>

好了，很简单的代码，至于为什么要传入数值怎么写大家可以看看帮助文档里面的BatteryManager  ---  The BatteryManager class contains strings and constants used for values in the

ACTION_BATTERY_CHANGED

Intent. 原来看mars的视频里面学到的最重要的不是如何开发Android而是学会使用帮助文档，也推荐大家看看这个学习视频，自我认为看视频比看书学得快-0-
 
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