content: /*
   * Copyright (C) 2006 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package android.telephony;
  
  import android.os.Bundle;
  import android.os.RemoteException;
  import android.os.ServiceManager;
  
  import android.annotation.UnsupportedAppUsage;
  import android.telephony.cdma.CdmaCellLocation;
  import android.telephony.gsm.GsmCellLocation;
  import com.android.internal.telephony.ITelephony;
  import com.android.internal.telephony.PhoneConstants;
  
  /**
   * Abstract class that represents the location of the device.  {@more}
   */
  public abstract class CellLocation {
  
      /**
       * Request an update of the current location.  If the location has changed,
       * a broadcast will be sent to everyone registered with {@link
       * PhoneStateListener#LISTEN_CELL_LOCATION}.
       */
      public static void requestLocationUpdate() {
          try {
              ITelephony phone = ITelephony.Stub.asInterface(ServiceManager.getService("phone"));
              if (phone != null) {
                  phone.updateServiceLocation();
              }
          } catch (RemoteException ex) {
              // ignore it
          }
      }
  
      /**
       * Create a new CellLocation from a intent notifier Bundle
       *
       * This method is used by PhoneStateIntentReceiver and maybe by
       * external applications.
       *
       * @param bundle Bundle from intent notifier
       * @return newly created CellLocation
       *
       * @hide
       */
      @UnsupportedAppUsage
      public static CellLocation newFromBundle(Bundle bundle) {
          // TelephonyManager.getDefault().getCurrentPhoneType() handles the case when
          // ITelephony interface is not up yet.
          switch(TelephonyManager.getDefault().getCurrentPhoneType()) {
          case PhoneConstants.PHONE_TYPE_CDMA:
              return new CdmaCellLocation(bundle);
          case PhoneConstants.PHONE_TYPE_GSM:
              return new GsmCellLocation(bundle);
          default:
              return null;
          }
      }
  
      /**
       * @hide
       */
      @UnsupportedAppUsage
      public abstract void fillInNotifierBundle(Bundle bundle);
  
      /**
       * @hide
       */
      @UnsupportedAppUsage
      public abstract boolean isEmpty();
  
      /**
       * Invalidate this object.  The location area code and the cell id are set to -1.
       * @hide
       */
      public abstract void setStateInvalid();
  
      /**
       * Return a new CellLocation object representing an unknown
       * location, or null for unknown/none phone radio types.
       *
       */
      public static CellLocation getEmpty() {
          // TelephonyManager.getDefault().getCurrentPhoneType() handles the case when
          // ITelephony interface is not up yet.
          switch(TelephonyManager.getDefault().getCurrentPhoneType()) {
          case PhoneConstants.PHONE_TYPE_CDMA:
              return new CdmaCellLocation();
          case PhoneConstants.PHONE_TYPE_GSM:
              return new GsmCellLocation();
          default:
              return null;
          }
      }
  }
  