1 /* 2 * Copyright (C) 2017 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.incallui.calllocation.impl; 18 19 import android.location.Location; 20 import android.net.TrafficStats; 21 import android.os.AsyncTask; 22 import com.android.dialer.common.LogUtil; 23 import com.android.incallui.calllocation.impl.LocationPresenter.LocationUi; 24 import java.lang.ref.WeakReference; 25 import org.json.JSONArray; 26 import org.json.JSONException; 27 import org.json.JSONObject; 28 29 class ReverseGeocodeTask extends AsyncTask<Location, Void, String> { 30 31 // Below are the JSON keys for the reverse geocode response. 32 // Source: https://developers.google.com/maps/documentation/geocoding/#ReverseGeocoding 33 private static final String JSON_KEY_RESULTS = "results"; 34 private static final String JSON_KEY_ADDRESS = "formatted_address"; 35 private static final String JSON_KEY_ADDRESS_COMPONENTS = "address_components"; 36 private static final String JSON_KEY_PREMISE = "premise"; 37 private static final String JSON_KEY_TYPES = "types"; 38 private static final String JSON_KEY_LONG_NAME = "long_name"; 39 private static final String JSON_KEY_SHORT_NAME = "short_name"; 40 41 private WeakReference<LocationUi> mUiReference; 42 ReverseGeocodeTask(WeakReference<LocationUi> uiReference)43 public ReverseGeocodeTask(WeakReference<LocationUi> uiReference) { 44 mUiReference = uiReference; 45 } 46 47 @Override doInBackground(Location... locations)48 protected String doInBackground(Location... locations) { 49 LocationUi ui = mUiReference.get(); 50 if (ui == null) { 51 return null; 52 } 53 if (locations == null || locations.length == 0) { 54 LogUtil.e("ReverseGeocodeTask.onLocationChanged", "No location provided"); 55 return null; 56 } 57 58 try { 59 String address = null; 60 String url = LocationUrlBuilder.getReverseGeocodeUrl(locations[0]); 61 62 TrafficStats.setThreadStatsTag(TrafficStatsTags.REVERSE_GEOCODE_TAG); 63 String jsonResponse = HttpFetcher.getRequestAsString(ui.getContext(), url); 64 65 // Parse the JSON response for the formatted address of the first result. 66 JSONObject responseObject = new JSONObject(jsonResponse); 67 if (responseObject != null) { 68 JSONArray results = responseObject.optJSONArray(JSON_KEY_RESULTS); 69 if (results != null && results.length() > 0) { 70 JSONObject topResult = results.optJSONObject(0); 71 if (topResult != null) { 72 address = topResult.getString(JSON_KEY_ADDRESS); 73 74 // Strip off the Premise component from the address, if present. 75 JSONArray components = topResult.optJSONArray(JSON_KEY_ADDRESS_COMPONENTS); 76 if (components != null) { 77 boolean stripped = false; 78 for (int i = 0; !stripped && i < components.length(); i++) { 79 JSONObject component = components.optJSONObject(i); 80 JSONArray types = component.optJSONArray(JSON_KEY_TYPES); 81 if (types != null) { 82 for (int j = 0; !stripped && j < types.length(); j++) { 83 if (JSON_KEY_PREMISE.equals(types.getString(j))) { 84 String premise = null; 85 if (component.has(JSON_KEY_SHORT_NAME) 86 && address.startsWith(component.getString(JSON_KEY_SHORT_NAME))) { 87 premise = component.getString(JSON_KEY_SHORT_NAME); 88 } else if (component.has(JSON_KEY_LONG_NAME) 89 && address.startsWith(component.getString(JSON_KEY_LONG_NAME))) { 90 premise = component.getString(JSON_KEY_SHORT_NAME); 91 } 92 if (premise != null) { 93 int index = address.indexOf(',', premise.length()); 94 if (index > 0 && index < address.length()) { 95 address = address.substring(index + 1).trim(); 96 } 97 stripped = true; 98 break; 99 } 100 } 101 } 102 } 103 } 104 } 105 106 // Strip off the country, if its USA. Note: unfortunately the country in the formatted 107 // address field doesn't match the country in the address component fields (USA != US) 108 // so we can't easily strip off the country for all cases, thus this hack. 109 if (address.endsWith(", USA")) { 110 address = address.substring(0, address.length() - 5); 111 } 112 } 113 } 114 } 115 116 return address; 117 } catch (AuthException ex) { 118 LogUtil.e("ReverseGeocodeTask.onLocationChanged", "AuthException", ex); 119 return null; 120 } catch (JSONException ex) { 121 LogUtil.e("ReverseGeocodeTask.onLocationChanged", "JSONException", ex); 122 return null; 123 } catch (Exception ex) { 124 LogUtil.e("ReverseGeocodeTask.onLocationChanged", "Exception!!!", ex); 125 return null; 126 } finally { 127 TrafficStats.clearThreadStatsTag(); 128 } 129 } 130 131 @Override onPostExecute(String address)132 protected void onPostExecute(String address) { 133 LocationUi ui = mUiReference.get(); 134 if (ui == null) { 135 return; 136 } 137 138 try { 139 ui.setAddress(address); 140 } catch (Exception ex) { 141 LogUtil.e("ReverseGeocodeTask.onPostExecute", "Exception!!!", ex); 142 } 143 } 144 } 145