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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.internal.location;
     18 
     19 import android.content.ComponentName;
     20 import android.content.Context;
     21 import android.content.Intent;
     22 import android.content.ServiceConnection;
     23 import android.location.Address;
     24 import android.location.GeocoderParams;
     25 import android.location.IGeocodeProvider;
     26 import android.os.IBinder;
     27 import android.os.RemoteException;
     28 import android.os.SystemClock;
     29 import android.util.Log;
     30 
     31 import java.util.List;
     32 
     33 /**
     34  * A class for proxying IGeocodeProvider implementations.
     35  *
     36  * {@hide}
     37  */
     38 public class GeocoderProxy {
     39 
     40     private static final String TAG = "GeocoderProxy";
     41 
     42     private final Context mContext;
     43     private final Intent mIntent;
     44     private final Connection mServiceConnection = new Connection();
     45     private IGeocodeProvider mProvider;
     46 
     47     public GeocoderProxy(Context context, String serviceName) {
     48         mContext = context;
     49         mIntent = new Intent(serviceName);
     50         mContext.bindService(mIntent, mServiceConnection, Context.BIND_AUTO_CREATE);
     51     }
     52 
     53     private class Connection implements ServiceConnection {
     54         public void onServiceConnected(ComponentName className, IBinder service) {
     55             Log.d(TAG, "onServiceConnected " + className);
     56             synchronized (this) {
     57                 mProvider = IGeocodeProvider.Stub.asInterface(service);
     58             }
     59         }
     60 
     61         public void onServiceDisconnected(ComponentName className) {
     62             Log.d(TAG, "onServiceDisconnected " + className);
     63             synchronized (this) {
     64                 mProvider = null;
     65             }
     66         }
     67     }
     68 
     69     public String getFromLocation(double latitude, double longitude, int maxResults,
     70             GeocoderParams params, List<Address> addrs) {
     71         IGeocodeProvider provider;
     72         synchronized (mServiceConnection) {
     73             provider = mProvider;
     74         }
     75         if (provider != null) {
     76             try {
     77                 return provider.getFromLocation(latitude, longitude, maxResults,
     78                         params, addrs);
     79             } catch (RemoteException e) {
     80                 Log.e(TAG, "getFromLocation failed", e);
     81             }
     82         }
     83         return "Service not Available";
     84     }
     85 
     86     public String getFromLocationName(String locationName,
     87             double lowerLeftLatitude, double lowerLeftLongitude,
     88             double upperRightLatitude, double upperRightLongitude, int maxResults,
     89             GeocoderParams params, List<Address> addrs) {
     90         IGeocodeProvider provider;
     91         synchronized (mServiceConnection) {
     92             provider = mProvider;
     93         }
     94         if (provider != null) {
     95             try {
     96                 return provider.getFromLocationName(locationName, lowerLeftLatitude,
     97                         lowerLeftLongitude, upperRightLatitude, upperRightLongitude,
     98                         maxResults, params, addrs);
     99             } catch (RemoteException e) {
    100                 Log.e(TAG, "getFromLocationName failed", e);
    101             }
    102         }
    103         return "Service not Available";
    104     }
    105 }
    106