Android中电池信息(Battery information)的取得(一)

这里介绍电池信息的取得.

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 =