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.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 Object mMutex = new Object(); // synchronizes access to mServiceConnection 45 private Connection mServiceConnection = new Connection(); // never null 46 47 public GeocoderProxy(Context context, String serviceName) { 48 mContext = context; 49 mIntent = new Intent(serviceName); 50 mContext.bindService(mIntent, mServiceConnection, 51 Context.BIND_AUTO_CREATE | Context.BIND_NOT_FOREGROUND 52 | Context.BIND_ALLOW_OOM_MANAGEMENT); 53 } 54 55 /** 56 * When unbundled NetworkLocationService package is updated, we 57 * need to unbind from the old version and re-bind to the new one. 58 */ 59 public void reconnect() { 60 synchronized (mMutex) { 61 mContext.unbindService(mServiceConnection); 62 mServiceConnection = new Connection(); 63 mContext.bindService(mIntent, mServiceConnection, 64 Context.BIND_AUTO_CREATE | Context.BIND_NOT_FOREGROUND 65 | Context.BIND_ALLOW_OOM_MANAGEMENT); 66 } 67 } 68 69 private class Connection implements ServiceConnection { 70 71 private IGeocodeProvider mProvider; 72 73 public void onServiceConnected(ComponentName className, IBinder service) { 74 synchronized (this) { 75 mProvider = IGeocodeProvider.Stub.asInterface(service); 76 } 77 } 78 79 public void onServiceDisconnected(ComponentName className) { 80 synchronized (this) { 81 mProvider = null; 82 } 83 } 84 85 public IGeocodeProvider getProvider() { 86 synchronized (this) { 87 return mProvider; 88 } 89 } 90 } 91 92 public String getFromLocation(double latitude, double longitude, int maxResults, 93 GeocoderParams params, List<Address> addrs) { 94 IGeocodeProvider provider; 95 synchronized (mMutex) { 96 provider = mServiceConnection.getProvider(); 97 } 98 if (provider != null) { 99 try { 100 return provider.getFromLocation(latitude, longitude, maxResults, 101 params, addrs); 102 } catch (RemoteException e) { 103 Log.e(TAG, "getFromLocation failed", e); 104 } 105 } 106 return "Service not Available"; 107 } 108 109 public String getFromLocationName(String locationName, 110 double lowerLeftLatitude, double lowerLeftLongitude, 111 double upperRightLatitude, double upperRightLongitude, int maxResults, 112 GeocoderParams params, List<Address> addrs) { 113 IGeocodeProvider provider; 114 synchronized (mMutex) { 115 provider = mServiceConnection.getProvider(); 116 } 117 if (provider != null) { 118 try { 119 return provider.getFromLocationName(locationName, lowerLeftLatitude, 120 lowerLeftLongitude, upperRightLatitude, upperRightLongitude, 121 maxResults, params, addrs); 122 } catch (RemoteException e) { 123 Log.e(TAG, "getFromLocationName failed", e); 124 } 125 } 126 return "Service not Available"; 127 } 128 } 129