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：

<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>

2.接下来是在activity中的操作：

创建一个IntentFilter

private IntentFilter mIntentFilter; 

在oncreate的方法中：加入：

//电池相关 mIntentFilter = new IntentFilter(); mIntentFilter.addAction(Intent.ACTION_BATTERY_CHANGED); 

3.接收广播

//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));    }   }  }; 

这里真正处理图片变换的是以下几句话：

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; }

4.在onResume方法中注册消息处理器

registerReceiver(mIntentReceiver, mIntentFilter); 

5.在onPause方法中注销

unregisterReceiver(mIntentReceiver);

希望本文所述对大家的Android程序设计有所帮助。