Android電池電量狀態源碼

/**
   * 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();    
    // 註冊訊息處理器
    registerReceiver(mIntentReceiver, mIntentFilter);
  }
 
  //聲明訊息處理過程
   private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
       @Override
       public void onReceive(Context context, Intent intent) {
           String action = intent.getAction();
           //要看看是不是我們要處理的訊息
           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));
           }
       }
   };