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      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.server.location;
     18 
     19 import android.content.Context;
     20 import android.location.Address;
     21 import android.location.GeocoderParams;
     22 import android.location.IGeocodeProvider;
     23 import android.os.Handler;
     24 import android.os.RemoteException;
     25 import android.os.UserHandle;
     26 import android.util.Log;
     27 
     28 import com.android.server.ServiceWatcher;
     29 import java.util.List;
     30 
     31 /**
     32  * Proxy for IGeocodeProvider implementations.
     33  */
     34 public class GeocoderProxy {
     35     private static final String TAG = "GeocoderProxy";
     36 
     37     private static final String SERVICE_ACTION = "com.android.location.service.GeocodeProvider";
     38 
     39     private final Context mContext;
     40     private final ServiceWatcher mServiceWatcher;
     41 
     42     public static GeocoderProxy createAndBind(Context context,
     43             int overlaySwitchResId, int defaultServicePackageNameResId,
     44             int initialPackageNamesResId, Handler handler) {
     45         GeocoderProxy proxy = new GeocoderProxy(context, overlaySwitchResId,
     46             defaultServicePackageNameResId, initialPackageNamesResId, handler);
     47         if (proxy.bind()) {
     48             return proxy;
     49         } else {
     50             return null;
     51         }
     52     }
     53 
     54     private GeocoderProxy(Context context,
     55             int overlaySwitchResId, int defaultServicePackageNameResId,
     56             int initialPackageNamesResId, Handler handler) {
     57         mContext = context;
     58 
     59         mServiceWatcher = new ServiceWatcher(mContext, TAG, SERVICE_ACTION, overlaySwitchResId,
     60             defaultServicePackageNameResId, initialPackageNamesResId, null, handler);
     61     }
     62 
     63     private boolean bind () {
     64         return mServiceWatcher.start();
     65     }
     66 
     67     private IGeocodeProvider getService() {
     68         return IGeocodeProvider.Stub.asInterface(mServiceWatcher.getBinder());
     69     }
     70 
     71     public String getConnectedPackageName() {
     72         return mServiceWatcher.getBestPackageName();
     73     }
     74 
     75     public String getFromLocation(double latitude, double longitude, int maxResults,
     76             GeocoderParams params, List<Address> addrs) {
     77         IGeocodeProvider provider = getService();
     78         if (provider != null) {
     79             try {
     80                 return provider.getFromLocation(latitude, longitude, maxResults, params, addrs);
     81             } catch (RemoteException e) {
     82                 Log.w(TAG, e);
     83             }
     84         }
     85         return "Service not Available";
     86     }
     87 
     88     public String getFromLocationName(String locationName,
     89             double lowerLeftLatitude, double lowerLeftLongitude,
     90             double upperRightLatitude, double upperRightLongitude, int maxResults,
     91             GeocoderParams params, List<Address> addrs) {
     92         IGeocodeProvider provider = getService();
     93         if (provider != null) {
     94             try {
     95                 return provider.getFromLocationName(locationName, lowerLeftLatitude,
     96                         lowerLeftLongitude, upperRightLatitude, upperRightLongitude,
     97                         maxResults, params, addrs);
     98             } catch (RemoteException e) {
     99                 Log.w(TAG, e);
    100             }
    101         }
    102         return "Service not Available";
    103     }
    104 
    105 }
    106