Android 電量相關的內容

監控手機電量的變化和充電狀態

在BatteryManager中有一個粘性廣播，不需要BroadcastReceiver作為接收器，在注冊時將傳入null

IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
Intent intent = context.registerReceiver(null, filter);

從intent中就可以獲取相關的電池的狀態

當前電量

int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
int scale = batteryStatus.getIntExtra(BatteryManager.EXTRA_SCALE, -1); //電量的刻度

當前的充電狀態

int status = intent.getIntExtra(BatteryManager.EXTRA_STATUS, BatteryManager.BATTERY_STATUS_UNKNOWN);

充電狀態值：

當前的充電方式

int plug = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);

充電的方式

監聽充電狀態的變化

可以通過注冊靜態廣播，監聽 Intent.ACTION_POWER_CONNECTED Intent.ACTION_POWER_DISCONNECTED

<receiver
  android:name=".PowerReceiver">
  <intent-filter>
      <action android:name="android.intent.action.ACTION_POWER_CONNECTED" />
      <action android:name="android.intent.action.ACTION_POWER_DISCONNECTED" />
  </intent-filter>
</receiver>

public class PowerReceiver extends BroadcastReceiver{

  private static final String TAG = PowerReceiver.class.getSimpleName();

  @Override
  public void onReceive(Context context, Intent intent) {
      String action = intent.getAction();
      if(action.equals(Intent.ACTION_POWER_CONNECTED)){
          Log.d(TAG, "power connected");

      }else if(action.equals(Intent.ACTION_POWER_DISCONNECTED)){
          Log.e(TAG, "power disconnected");

      }
  }
}

確定基座的狀態變化和類型

注冊粘性廣播ACTION_DOCK_EVENT，來判斷是插入底座，以及底座的類型

IntentFilter ifilter = new IntentFilter(Intent.ACTION_DOCK_EVENT);
Intent dockStatus = context.registerReceiver(null, ifilter);

int dockState = dockStatus.getIntExtra(EXTRA_DOCK_STATE, -1); //底座類型
boolean isDocked = dockState != Intent.EXTRA_DOCK_STATE_UNDOCKED; //是否插入了底座

底座的類型：