Android实现侦听电池状态显示、电量及充电动态显示的方法

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。