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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.util.Log;
     26 
     27 import com.android.server.ServiceWatcher;
     28 import java.util.List;
     29 
     30 /**
     31  * Proxy for IGeocodeProvider implementations.
     32  */
     33 public class GeocoderProxy {
     34     private static final String TAG = "GeocoderProxy";
     35 
     36     private static final String SERVICE_ACTION = "com.android.location.service.GeocodeProvider";
     37 
     38     private final Context mContext;
     39     private final ServiceWatcher mServiceWatcher;
     40 
     41     public static GeocoderProxy createAndBind(Context context,
     42             int overlaySwitchResId, int defaultServicePackageNameResId,
     43             int initialPackageNamesResId, Handler handler) {
     44         GeocoderProxy proxy = new GeocoderProxy(context, overlaySwitchResId,
     45             defaultServicePackageNameResId, initialPackageNamesResId, handler);
     46         if (proxy.bind()) {
     47             return proxy;
     48         } else {
     49             return null;
     50         }
     51     }
     52 
     53     private GeocoderProxy(Context context,
     54             int overlaySwitchResId, int defaultServicePackageNameResId,
     55             int initialPackageNamesResId, Handler handler) {
     56         mContext = context;
     57 
     58         mServiceWatcher = new ServiceWatcher(mContext, TAG, SERVICE_ACTION, overlaySwitchResId,
     59             defaultServicePackageNameResId, initialPackageNamesResId, null, handler);
     60     }
     61 
     62     private boolean bind () {
     63         return mServiceWatcher.start();
     64     }
     65 
     66     private IGeocodeProvider getService() {
     67         return IGeocodeProvider.Stub.asInterface(mServiceWatcher.getBinder());
     68     }
     69 
     70     public String getConnectedPackageName() {
     71         return mServiceWatcher.getBestPackageName();
     72     }
     73 
     74     public String getFromLocation(double latitude, double longitude, int maxResults,
     75             GeocoderParams params, List<Address> addrs) {
     76         IGeocodeProvider provider = getService();
     77         if (provider != null) {
     78             try {
     79                 return provider.getFromLocation(latitude, longitude, maxResults, params, addrs);
     80             } catch (RemoteException e) {
     81                 Log.w(TAG, e);
     82             }
     83         }
     84         return "Service not Available";
     85     }
     86 
     87     public String getFromLocationName(String locationName,
     88             double lowerLeftLatitude, double lowerLeftLongitude,
     89             double upperRightLatitude, double upperRightLongitude, int maxResults,
     90             GeocoderParams params, List<Address> addrs) {
     91         IGeocodeProvider provider = getService();
     92         if (provider != null) {
     93             try {
     94                 return provider.getFromLocationName(locationName, lowerLeftLatitude,
     95                         lowerLeftLongitude, upperRightLatitude, upperRightLongitude,
     96                         maxResults, params, addrs);
     97             } catch (RemoteException e) {
     98                 Log.w(TAG, e);
     99             }
    100         }
    101         return "Service not Available";
    102     }
    103 
    104 }
    105