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
17package com.android.camera;
18
19import android.location.Address;
20import android.location.Geocoder;
21import android.os.AsyncTask;
22import android.util.Log;
23
24import java.io.IOException;
25import java.util.List;
26
27// Reverse geocoding may take a long time to return so we put it in AsyncTask.
28public class ReverseGeocoderTask extends AsyncTask<Void, Void, String> {
29    private static final String TAG = "ReverseGeocoder";
30
31    public static interface Callback {
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
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
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
71    protected void onPostExecute(String location) {
72        mCallback.onComplete(location);
73    }
74}
75
76