1 /*
2  * Copyright (C) 2009 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.camera;
18 
19 import android.location.Address;
20 import android.location.Geocoder;
21 import android.os.AsyncTask;
22 import android.util.Log;
23 
24 import java.io.IOException;
25 import java.util.List;
26 
27 // Reverse geocoding may take a long time to return so we put it in AsyncTask.
28 public class ReverseGeocoderTask extends AsyncTask<Void, Void, String> {
29     private static final String TAG = "ReverseGeocoder";
30 
31     public static interface Callback {
onComplete(String location)32         public void onComplete(String location);
33     }
34 
35     private Geocoder mGeocoder;
36     private float mLat;
37     private float mLng;
38     private Callback mCallback;
39 
ReverseGeocoderTask(Geocoder geocoder, float[] latlng, Callback callback)40     public ReverseGeocoderTask(Geocoder geocoder, float[] latlng,
41             Callback callback) {
42         mGeocoder = geocoder;
43         mLat = latlng[0];
44         mLng = latlng[1];
45         mCallback = callback;
46     }
47 
48     @Override
doInBackground(Void... params)49     protected String doInBackground(Void... params) {
50         String value = MenuHelper.EMPTY_STRING;
51         try {
52             List<Address> address =
53                     mGeocoder.getFromLocation(mLat, mLng, 1);
54             StringBuilder sb = new StringBuilder();
55             for (Address addr : address) {
56                 int index = addr.getMaxAddressLineIndex();
57                 sb.append(addr.getAddressLine(index));
58             }
59             value = sb.toString();
60         } catch (IOException ex) {
61             value = MenuHelper.EMPTY_STRING;
62             Log.e(TAG, "Geocoder exception: ", ex);
63         } catch (RuntimeException ex) {
64             value = MenuHelper.EMPTY_STRING;
65             Log.e(TAG, "Geocoder exception: ", ex);
66         }
67         return value;
68     }
69 
70     @Override
onPostExecute(String location)71     protected void onPostExecute(String location) {
72         mCallback.onComplete(location);
73     }
74 }
75 
76