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.dialer.constants.TrafficStatsTags; 24 import com.android.incallui.calllocation.impl.LocationPresenter.LocationUi; 25 import java.lang.ref.WeakReference; 26 import org.json.JSONArray; 27 import org.json.JSONException; 28 import org.json.JSONObject; 29 30 class ReverseGeocodeTask extends AsyncTask<Location, Void, String> { 31 32 // Below are the JSON keys for the reverse geocode response. 33 // Source: https://developers.google.com/maps/documentation/geocoding/#ReverseGeocoding 34 private static final String JSON_KEY_RESULTS = "results"; 35 private static final String JSON_KEY_ADDRESS = "formatted_address"; 36 private static final String JSON_KEY_ADDRESS_COMPONENTS = "address_components"; 37 private static final String JSON_KEY_PREMISE = "premise"; 38 private static final String JSON_KEY_TYPES = "types"; 39 private static final String JSON_KEY_LONG_NAME = "long_name"; 40 private static final String JSON_KEY_SHORT_NAME = "short_name"; 41 42 private WeakReference<LocationUi> uiReference; 43 ReverseGeocodeTask(WeakReference<LocationUi> uiReference)44 public ReverseGeocodeTask(WeakReference<LocationUi> uiReference) { 45 this.uiReference = uiReference; 46 } 47 48 @Override doInBackground(Location... locations)49 protected String doInBackground(Location... locations) { 50 LocationUi ui = uiReference.get(); 51 if (ui == null) { 52 return null; 53 } 54 if (locations == null || locations.length == 0) { 55 LogUtil.e("ReverseGeocodeTask.onLocationChanged", "No location provided"); 56 return null; 57 } 58 59 try { 60 String address = null; 61 String url = LocationUrlBuilder.getReverseGeocodeUrl(locations[0]); 62 63 TrafficStats.setThreadStatsTag(TrafficStatsTags.REVERSE_GEOCODE_TAG); 64 String jsonResponse = HttpFetcher.getRequestAsString(ui.getContext(), url); 65 66 // Parse the JSON response for the formatted address of the first result. 67 JSONObject responseObject = new JSONObject(jsonResponse); 68 if (responseObject != null) { 69 JSONArray results = responseObject.optJSONArray(JSON_KEY_RESULTS); 70 if (results != null && results.length() > 0) { 71 JSONObject topResult = results.optJSONObject(0); 72 if (topResult != null) { 73 address = topResult.getString(JSON_KEY_ADDRESS); 74 75 // Strip off the Premise component from the address, if present. 76 JSONArray components = topResult.optJSONArray(JSON_KEY_ADDRESS_COMPONENTS); 77 if (components != null) { 78 boolean stripped = false; 79 for (int i = 0; !stripped && i < components.length(); i++) { 80 JSONObject component = components.optJSONObject(i); 81 JSONArray types = component.optJSONArray(JSON_KEY_TYPES); 82 if (types != null) { 83 for (int j = 0; !stripped && j < types.length(); j++) { 84 if (JSON_KEY_PREMISE.equals(types.getString(j))) { 85 String premise = null; 86 if (component.has(JSON_KEY_SHORT_NAME) 87 && address.startsWith(component.getString(JSON_KEY_SHORT_NAME))) { 88 premise = component.getString(JSON_KEY_SHORT_NAME); 89 } else if (component.has(JSON_KEY_LONG_NAME) 90 && address.startsWith(component.getString(JSON_KEY_LONG_NAME))) { 91 premise = component.getString(JSON_KEY_SHORT_NAME); 92 } 93 if (premise != null) { 94 int index = address.indexOf(',', premise.length()); 95 if (index > 0 && index < address.length()) { 96 address = address.substring(index + 1).trim(); 97 } 98 stripped = true; 99 break; 100 } 101 } 102 } 103 } 104 } 105 } 106 107 // Strip off the country, if its USA. Note: unfortunately the country in the formatted 108 // address field doesn't match the country in the address component fields (USA != US) 109 // so we can't easily strip off the country for all cases, thus this hack. 110 if (address.endsWith(", USA")) { 111 address = address.substring(0, address.length() - 5); 112 } 113 } 114 } 115 } 116 117 return address; 118 } catch (AuthException ex) { 119 LogUtil.e("ReverseGeocodeTask.onLocationChanged", "AuthException", ex); 120 return null; 121 } catch (JSONException ex) { 122 LogUtil.e("ReverseGeocodeTask.onLocationChanged", "JSONException", ex); 123 return null; 124 } catch (Exception ex) { 125 LogUtil.e("ReverseGeocodeTask.onLocationChanged", "Exception!!!", ex); 126 return null; 127 } finally { 128 TrafficStats.clearThreadStatsTag(); 129 } 130 } 131 132 @Override onPostExecute(String address)133 protected void onPostExecute(String address) { 134 LocationUi ui = uiReference.get(); 135 if (ui == null) { 136 return; 137 } 138 139 try { 140 ui.setAddress(address); 141 } catch (Exception ex) { 142 LogUtil.e("ReverseGeocodeTask.onPostExecute", "Exception!!!", ex); 143 } 144 } 145 } 146