當手機電量有變化，或者有充電情況的時候，android會自動的發送一個廣播，要監視充電情況，只需截獲這個廣播就ok啦！
/**
* 先聲明一個 IntentFilter 對象
*/
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();
// 注冊消息處理器
registerReceiver(mIntentReceiver, mIntentFilter);
}
//聲明消息處理過程
private BroadcastReceiver mIntentReceiver = newBroadcastReceiver() {
@Override
public void onReceive(Context context, Intentintent) {
String action = intent.getAction();
//要看看是不是我們要處理的消息
if (action.equals(Intent.ACTION_BATTERY_CHANGED)){
//電池電量，數字
Log.d("Battery", "" + intent.getIntExtra("level",0));
//電池最大容量
Log.d("Battery", "" + intent.getIntExtra("scale",0));
//電池伏數
Log.d("Battery", "" +intent.getIntExtra("voltage", 0));
//電池溫度
Log.d("Battery", "" +intent.getIntExtra("temperature", 0));
//電池狀態，返回是一個數字
// BatteryManager.BATTERY_STATUS_CHARGING 表示是充電狀態
// BatteryManager.BATTERY_STATUS_DISCHARGING 放電中
// BatteryManager.BATTERY_STATUS_NOT_CHARGING 未充電
// BatteryManager.BATTERY_STATUS_FULL 電池滿
Log.d("Battery", "" + intent.getIntExtra("status",BatteryManager.BATTERY_STATUS_UNKNOWN));
//充電類型 BatteryManager.BATTERY_PLUGGED_AC 表示是充電器，不是這個值，表示是 USB
Log.d("Battery", "" +intent.getIntExtra("plugged", 0));
//電池健康情況，返回也是一個數字
//BatteryManager.BATTERY_HEALTH_GOOD 良好
//BatteryManager.BATTERY_HEALTH_OVERHEAT 過熱
//BatteryManager.BATTERY_HEALTH_DEAD 沒電
//BatteryManager.BATTERY_HEALTH_OVER_VOLTAGE 過電壓
//BatteryManager.BATTERY_HEALTH_UNSPECIFIED_FAILURE 未知錯誤
Log.d("Battery", "" + intent.getIntExtra("health",BatteryManager.BATTERY_HEALTH_UNKNOWN));
}
}
};