本文实例讲述了android实现侦听电池状态显示、电量及充电动态显示的方法，是android应用程序开发中非常常用的重要功能。分享给大家供大家参考之用。具体方法如下：
使用android系统的电池侦听和系统的电池图片如下；
引入源代码中的两个xml文件（这里我在android2.2的jar包中找不到，所以才引入，源代码路径：c:\android-sdk-windows\platforms\android-8\data\res\drawable），之后会发现stat_sys_battery.xml报错，如下图所示：
1.这些图引入到我的drawable目录下，然后将stat_sys_battery.xml中的图片引入路径更改，如下：
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<level-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:maxlevel="4" android:drawable="@drawable/stat_sys_battery_0" />
<item android:maxlevel="14" android:drawable="@drawable/stat_sys_battery_10" />
<item android:maxlevel="29" android:drawable="@drawable/stat_sys_battery_20" />
<item android:maxlevel="49" android:drawable="@drawable/stat_sys_battery_40" />
<item android:maxlevel="69" android:drawable="@drawable/stat_sys_battery_60" />
<item android:maxlevel="89" android:drawable="@drawable/stat_sys_battery_80" />
<item android:maxlevel="100" android:drawable="@drawable/stat_sys_battery_100" />
</level-list>
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2.接下来是在activity中的操作：
创建一个intentfilter
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private intentfilter mintentfilter;
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在oncreate的方法中：加入：
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//电池相关
mintentfilter = new intentfilter();
mintentfilter.addaction(intent.action_battery_changed);
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3.接收广播
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//声明消息处理过程
private broadcastreceiver mintentreceiver = new broadcastreceiver() {
@override
public void onreceive(context context, intent intent) {
string action = intent.getaction();
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";
battery_image.setimageresource(r.drawable.stat_sys_battery_charge);
battery_image.getdrawable().setlevel(level);
break;
case batterymanager.battery_status_discharging:
statusstring = "discharging";
battery_image.setimageresource(r.drawable.stat_sys_battery);
battery_image.getdrawable().setlevel(level);
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.i("cat", statusstring);
log.i("cat", healthstring);
log.i("cat", string.valueof(present));
log.i("cat", string.valueof(level));
log.i("cat", string.valueof(scale));
log.i("cat", string.valueof(icon_small));
log.i("cat", acstring);
log.i("cat", string.valueof(voltage));
log.i("cat", string.valueof(temperature));
log.i("cat", technology);
//要看看是不是我们要处理的消息
if (action.equals(intent.action_battery_changed)) {
//电池电量，数字
log.d("battery", "" + intent.getintextra("level", 0));
//电池最大容量
log.d("battery", "" + intent.getintextra("scale", 0));
//电池伏数
log.d("battery", "" + intent.getintextra("voltage", 0));
//电池温度
log.d("battery", "" + intent.getintextra("temperature", 0));
//电池状态，返回是一个数字
// batterymanager.battery_status_charging 表示是充电状态
// batterymanager.battery_status_discharging 放电中
// batterymanager.battery_status_not_charging 未充电
// batterymanager.battery_status_full 电池满
log.d("battery", "ss" + intent.getintextra("status", batterymanager.battery_status_charging));
//充电类型 batterymanager.battery_plugged_ac 表示是充电器，不是这个值，表示是 usb
log.d("battery", "" + intent.getintextra("plugged", 0));
//电池健康情况，返回也是一个数字
//batterymanager.battery_health_good 良好
//batterymanager.battery_health_overheat 过热
//batterymanager.battery_health_dead 没电
//batterymanager.battery_health_over_voltage 过电压
//batterymanager.battery_health_unspecified_failure 未知错误
log.d("battery", "" + intent.getintextra("health", batterymanager.battery_health_unknown));
}
}
};
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这里真正处理图片变换的是以下几句话：
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switch (status) {
case batterymanager.battery_status_unknown:
statusstring = "unknown";
break;
case batterymanager.battery_status_charging:
statusstring = "charging";
battery_image.setimageresource(r.drawable.stat_sys_battery_charge);
battery_image.getdrawable().setlevel(level);
break;
case batterymanager.battery_status_discharging:
statusstring = "discharging";
battery_image.setimageresource(r.drawable.stat_sys_battery);
battery_image.getdrawable().setlevel(level);
break;
case batterymanager.battery_status_not_charging:
statusstring = "not charging";
break;
case batterymanager.battery_status_full:
statusstring = "full";
break;
}
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4.在onresume方法中注册消息处理器
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registerreceiver(mintentreceiver, mintentfilter);
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5.在onpause方法中注销
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unregisterreceiver(mintentreceiver);
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希望本文所述对大家的android程序设计有所帮助。