当手机电量有变化，或者有充电情况的时候，android会自动的发送一个广播，要监视充电情况，只需截获这个广播就ok啦！
/**
* 先声明一个 IntentFilter 对象
*/
private IntentFilter mIntentFilter;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mIntentFilter = new IntentFilter();
mIntentFilter.addAction(Intent.ACTION_BATTERY_CHANGED);
}
protected void onResume()
{
super.onResume();
// 注册消息处理器
registerReceiver(mIntentReceiver, mIntentFilter);
}
//声明消息处理过程
private BroadcastReceiver mIntentReceiver = newBroadcastReceiver() {
@Override
public void onReceive(Context context, Intentintent) {
String action = intent.getAction();
//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", "" + intent.getIntExtra("status",BatteryManager.BATTERY_STATUS_UNKNOWN));
//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));
}
}
};