Owen Lin | a2fba68 | 2011-08-17 22:07:43 +0800 | [diff] [blame] | 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.gallery3d.util; |
| 18 | |
Owen Lin | a2fba68 | 2011-08-17 22:07:43 +0800 | [diff] [blame] | 19 | import android.content.Context; |
| 20 | import android.location.Address; |
| 21 | import android.location.Geocoder; |
| 22 | import android.location.Location; |
| 23 | import android.location.LocationManager; |
| 24 | import android.net.ConnectivityManager; |
| 25 | import android.net.NetworkInfo; |
| 26 | |
Owen Lin | 73a04ff | 2012-03-14 17:27:24 +0800 | [diff] [blame] | 27 | import com.android.gallery3d.common.BlobCache; |
| 28 | |
Owen Lin | a2fba68 | 2011-08-17 22:07:43 +0800 | [diff] [blame] | 29 | import java.io.ByteArrayInputStream; |
| 30 | import java.io.ByteArrayOutputStream; |
| 31 | import java.io.DataInputStream; |
| 32 | import java.io.DataOutputStream; |
| 33 | import java.io.IOException; |
| 34 | import java.util.List; |
| 35 | import java.util.Locale; |
| 36 | |
| 37 | public class ReverseGeocoder { |
| 38 | private static final String TAG = "ReverseGeocoder"; |
| 39 | public static final int EARTH_RADIUS_METERS = 6378137; |
| 40 | public static final int LAT_MIN = -90; |
| 41 | public static final int LAT_MAX = 90; |
| 42 | public static final int LON_MIN = -180; |
| 43 | public static final int LON_MAX = 180; |
| 44 | private static final int MAX_COUNTRY_NAME_LENGTH = 8; |
| 45 | // If two points are within 20 miles of each other, use |
| 46 | // "Around Palo Alto, CA" or "Around Mountain View, CA". |
| 47 | // instead of directly jumping to the next level and saying |
| 48 | // "California, US". |
| 49 | private static final int MAX_LOCALITY_MILE_RANGE = 20; |
| 50 | |
| 51 | private static final String GEO_CACHE_FILE = "rev_geocoding"; |
| 52 | private static final int GEO_CACHE_MAX_ENTRIES = 1000; |
| 53 | private static final int GEO_CACHE_MAX_BYTES = 500 * 1024; |
| 54 | private static final int GEO_CACHE_VERSION = 0; |
| 55 | |
| 56 | public static class SetLatLong { |
| 57 | // The latitude and longitude of the min latitude point. |
| 58 | public double mMinLatLatitude = LAT_MAX; |
| 59 | public double mMinLatLongitude; |
| 60 | // The latitude and longitude of the max latitude point. |
| 61 | public double mMaxLatLatitude = LAT_MIN; |
| 62 | public double mMaxLatLongitude; |
| 63 | // The latitude and longitude of the min longitude point. |
| 64 | public double mMinLonLatitude; |
| 65 | public double mMinLonLongitude = LON_MAX; |
| 66 | // The latitude and longitude of the max longitude point. |
| 67 | public double mMaxLonLatitude; |
| 68 | public double mMaxLonLongitude = LON_MIN; |
| 69 | } |
| 70 | |
| 71 | private Context mContext; |
| 72 | private Geocoder mGeocoder; |
| 73 | private BlobCache mGeoCache; |
| 74 | private ConnectivityManager mConnectivityManager; |
| 75 | private static Address sCurrentAddress; // last known address |
| 76 | |
| 77 | public ReverseGeocoder(Context context) { |
| 78 | mContext = context; |
| 79 | mGeocoder = new Geocoder(mContext); |
| 80 | mGeoCache = CacheManager.getCache(context, GEO_CACHE_FILE, |
| 81 | GEO_CACHE_MAX_ENTRIES, GEO_CACHE_MAX_BYTES, |
| 82 | GEO_CACHE_VERSION); |
| 83 | mConnectivityManager = (ConnectivityManager) |
| 84 | context.getSystemService(Context.CONNECTIVITY_SERVICE); |
| 85 | } |
| 86 | |
| 87 | public String computeAddress(SetLatLong set) { |
| 88 | // The overall min and max latitudes and longitudes of the set. |
| 89 | double setMinLatitude = set.mMinLatLatitude; |
| 90 | double setMinLongitude = set.mMinLatLongitude; |
| 91 | double setMaxLatitude = set.mMaxLatLatitude; |
| 92 | double setMaxLongitude = set.mMaxLatLongitude; |
| 93 | if (Math.abs(set.mMaxLatLatitude - set.mMinLatLatitude) |
| 94 | < Math.abs(set.mMaxLonLongitude - set.mMinLonLongitude)) { |
| 95 | setMinLatitude = set.mMinLonLatitude; |
| 96 | setMinLongitude = set.mMinLonLongitude; |
| 97 | setMaxLatitude = set.mMaxLonLatitude; |
| 98 | setMaxLongitude = set.mMaxLonLongitude; |
| 99 | } |
| 100 | Address addr1 = lookupAddress(setMinLatitude, setMinLongitude, true); |
| 101 | Address addr2 = lookupAddress(setMaxLatitude, setMaxLongitude, true); |
| 102 | if (addr1 == null) |
| 103 | addr1 = addr2; |
| 104 | if (addr2 == null) |
| 105 | addr2 = addr1; |
| 106 | if (addr1 == null || addr2 == null) { |
| 107 | return null; |
| 108 | } |
| 109 | |
| 110 | // Get current location, we decide the granularity of the string based |
| 111 | // on this. |
| 112 | LocationManager locationManager = |
| 113 | (LocationManager) mContext.getSystemService(Context.LOCATION_SERVICE); |
| 114 | Location location = null; |
| 115 | List<String> providers = locationManager.getAllProviders(); |
| 116 | for (int i = 0; i < providers.size(); ++i) { |
| 117 | String provider = providers.get(i); |
| 118 | location = (provider != null) ? locationManager.getLastKnownLocation(provider) : null; |
| 119 | if (location != null) |
| 120 | break; |
| 121 | } |
| 122 | String currentCity = ""; |
| 123 | String currentAdminArea = ""; |
| 124 | String currentCountry = Locale.getDefault().getCountry(); |
| 125 | if (location != null) { |
| 126 | Address currentAddress = lookupAddress( |
| 127 | location.getLatitude(), location.getLongitude(), true); |
| 128 | if (currentAddress == null) { |
| 129 | currentAddress = sCurrentAddress; |
| 130 | } else { |
| 131 | sCurrentAddress = currentAddress; |
| 132 | } |
| 133 | if (currentAddress != null && currentAddress.getCountryCode() != null) { |
| 134 | currentCity = checkNull(currentAddress.getLocality()); |
| 135 | currentCountry = checkNull(currentAddress.getCountryCode()); |
| 136 | currentAdminArea = checkNull(currentAddress.getAdminArea()); |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | String closestCommonLocation = null; |
| 141 | String addr1Locality = checkNull(addr1.getLocality()); |
| 142 | String addr2Locality = checkNull(addr2.getLocality()); |
| 143 | String addr1AdminArea = checkNull(addr1.getAdminArea()); |
| 144 | String addr2AdminArea = checkNull(addr2.getAdminArea()); |
| 145 | String addr1CountryCode = checkNull(addr1.getCountryCode()); |
| 146 | String addr2CountryCode = checkNull(addr2.getCountryCode()); |
| 147 | |
| 148 | if (currentCity.equals(addr1Locality) || currentCity.equals(addr2Locality)) { |
| 149 | String otherCity = currentCity; |
| 150 | if (currentCity.equals(addr1Locality)) { |
| 151 | otherCity = addr2Locality; |
| 152 | if (otherCity.length() == 0) { |
| 153 | otherCity = addr2AdminArea; |
| 154 | if (!currentCountry.equals(addr2CountryCode)) { |
| 155 | otherCity += " " + addr2CountryCode; |
| 156 | } |
| 157 | } |
| 158 | addr2Locality = addr1Locality; |
| 159 | addr2AdminArea = addr1AdminArea; |
| 160 | addr2CountryCode = addr1CountryCode; |
| 161 | } else { |
| 162 | otherCity = addr1Locality; |
| 163 | if (otherCity.length() == 0) { |
| 164 | otherCity = addr1AdminArea; |
| 165 | if (!currentCountry.equals(addr1CountryCode)) { |
| 166 | otherCity += " " + addr1CountryCode; |
| 167 | } |
| 168 | } |
| 169 | addr1Locality = addr2Locality; |
| 170 | addr1AdminArea = addr2AdminArea; |
| 171 | addr1CountryCode = addr2CountryCode; |
| 172 | } |
| 173 | closestCommonLocation = valueIfEqual(addr1.getAddressLine(0), addr2.getAddressLine(0)); |
| 174 | if (closestCommonLocation != null && !("null".equals(closestCommonLocation))) { |
| 175 | if (!currentCity.equals(otherCity)) { |
| 176 | closestCommonLocation += " - " + otherCity; |
| 177 | } |
| 178 | return closestCommonLocation; |
| 179 | } |
| 180 | |
| 181 | // Compare thoroughfare (street address) next. |
| 182 | closestCommonLocation = valueIfEqual(addr1.getThoroughfare(), addr2.getThoroughfare()); |
| 183 | if (closestCommonLocation != null && !("null".equals(closestCommonLocation))) { |
| 184 | return closestCommonLocation; |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | // Compare the locality. |
| 189 | closestCommonLocation = valueIfEqual(addr1Locality, addr2Locality); |
| 190 | if (closestCommonLocation != null && !("".equals(closestCommonLocation))) { |
| 191 | String adminArea = addr1AdminArea; |
| 192 | String countryCode = addr1CountryCode; |
| 193 | if (adminArea != null && adminArea.length() > 0) { |
| 194 | if (!countryCode.equals(currentCountry)) { |
| 195 | closestCommonLocation += ", " + adminArea + " " + countryCode; |
| 196 | } else { |
| 197 | closestCommonLocation += ", " + adminArea; |
| 198 | } |
| 199 | } |
| 200 | return closestCommonLocation; |
| 201 | } |
| 202 | |
| 203 | // If the admin area is the same as the current location, we hide it and |
| 204 | // instead show the city name. |
| 205 | if (currentAdminArea.equals(addr1AdminArea) && currentAdminArea.equals(addr2AdminArea)) { |
| 206 | if ("".equals(addr1Locality)) { |
| 207 | addr1Locality = addr2Locality; |
| 208 | } |
| 209 | if ("".equals(addr2Locality)) { |
| 210 | addr2Locality = addr1Locality; |
| 211 | } |
| 212 | if (!"".equals(addr1Locality)) { |
| 213 | if (addr1Locality.equals(addr2Locality)) { |
| 214 | closestCommonLocation = addr1Locality + ", " + currentAdminArea; |
| 215 | } else { |
| 216 | closestCommonLocation = addr1Locality + " - " + addr2Locality; |
| 217 | } |
| 218 | return closestCommonLocation; |
| 219 | } |
| 220 | } |
| 221 | |
| 222 | // Just choose one of the localities if within a MAX_LOCALITY_MILE_RANGE |
| 223 | // mile radius. |
| 224 | float[] distanceFloat = new float[1]; |
| 225 | Location.distanceBetween(setMinLatitude, setMinLongitude, |
| 226 | setMaxLatitude, setMaxLongitude, distanceFloat); |
| 227 | int distance = (int) GalleryUtils.toMile(distanceFloat[0]); |
| 228 | if (distance < MAX_LOCALITY_MILE_RANGE) { |
| 229 | // Try each of the points and just return the first one to have a |
| 230 | // valid address. |
| 231 | closestCommonLocation = getLocalityAdminForAddress(addr1, true); |
| 232 | if (closestCommonLocation != null) { |
| 233 | return closestCommonLocation; |
| 234 | } |
| 235 | closestCommonLocation = getLocalityAdminForAddress(addr2, true); |
| 236 | if (closestCommonLocation != null) { |
| 237 | return closestCommonLocation; |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | // Check the administrative area. |
| 242 | closestCommonLocation = valueIfEqual(addr1AdminArea, addr2AdminArea); |
| 243 | if (closestCommonLocation != null && !("".equals(closestCommonLocation))) { |
| 244 | String countryCode = addr1CountryCode; |
| 245 | if (!countryCode.equals(currentCountry)) { |
| 246 | if (countryCode != null && countryCode.length() > 0) { |
| 247 | closestCommonLocation += " " + countryCode; |
| 248 | } |
| 249 | } |
| 250 | return closestCommonLocation; |
| 251 | } |
| 252 | |
| 253 | // Check the country codes. |
| 254 | closestCommonLocation = valueIfEqual(addr1CountryCode, addr2CountryCode); |
| 255 | if (closestCommonLocation != null && !("".equals(closestCommonLocation))) { |
| 256 | return closestCommonLocation; |
| 257 | } |
| 258 | // There is no intersection, let's choose a nicer name. |
| 259 | String addr1Country = addr1.getCountryName(); |
| 260 | String addr2Country = addr2.getCountryName(); |
| 261 | if (addr1Country == null) |
| 262 | addr1Country = addr1CountryCode; |
| 263 | if (addr2Country == null) |
| 264 | addr2Country = addr2CountryCode; |
| 265 | if (addr1Country == null || addr2Country == null) |
| 266 | return null; |
| 267 | if (addr1Country.length() > MAX_COUNTRY_NAME_LENGTH || addr2Country.length() > MAX_COUNTRY_NAME_LENGTH) { |
| 268 | closestCommonLocation = addr1CountryCode + " - " + addr2CountryCode; |
| 269 | } else { |
| 270 | closestCommonLocation = addr1Country + " - " + addr2Country; |
| 271 | } |
| 272 | return closestCommonLocation; |
| 273 | } |
| 274 | |
| 275 | private String checkNull(String locality) { |
| 276 | if (locality == null) |
| 277 | return ""; |
| 278 | if (locality.equals("null")) |
| 279 | return ""; |
| 280 | return locality; |
| 281 | } |
| 282 | |
| 283 | private String getLocalityAdminForAddress(final Address addr, final boolean approxLocation) { |
| 284 | if (addr == null) |
| 285 | return ""; |
| 286 | String localityAdminStr = addr.getLocality(); |
| 287 | if (localityAdminStr != null && !("null".equals(localityAdminStr))) { |
| 288 | if (approxLocation) { |
| 289 | // TODO: Uncomment these lines as soon as we may translations |
| 290 | // for Res.string.around. |
| 291 | // localityAdminStr = |
| 292 | // mContext.getResources().getString(Res.string.around) + " " + |
| 293 | // localityAdminStr; |
| 294 | } |
| 295 | String adminArea = addr.getAdminArea(); |
| 296 | if (adminArea != null && adminArea.length() > 0) { |
| 297 | localityAdminStr += ", " + adminArea; |
| 298 | } |
| 299 | return localityAdminStr; |
| 300 | } |
| 301 | return null; |
| 302 | } |
| 303 | |
| 304 | public Address lookupAddress(final double latitude, final double longitude, |
| 305 | boolean useCache) { |
| 306 | try { |
| 307 | long locationKey = (long) (((latitude + LAT_MAX) * 2 * LAT_MAX |
| 308 | + (longitude + LON_MAX)) * EARTH_RADIUS_METERS); |
| 309 | byte[] cachedLocation = null; |
| 310 | if (useCache && mGeoCache != null) { |
| 311 | cachedLocation = mGeoCache.lookup(locationKey); |
| 312 | } |
| 313 | Address address = null; |
| 314 | NetworkInfo networkInfo = mConnectivityManager.getActiveNetworkInfo(); |
| 315 | if (cachedLocation == null || cachedLocation.length == 0) { |
| 316 | if (networkInfo == null || !networkInfo.isConnected()) { |
| 317 | return null; |
| 318 | } |
| 319 | List<Address> addresses = mGeocoder.getFromLocation(latitude, longitude, 1); |
| 320 | if (!addresses.isEmpty()) { |
| 321 | address = addresses.get(0); |
| 322 | ByteArrayOutputStream bos = new ByteArrayOutputStream(); |
| 323 | DataOutputStream dos = new DataOutputStream(bos); |
| 324 | Locale locale = address.getLocale(); |
| 325 | writeUTF(dos, locale.getLanguage()); |
| 326 | writeUTF(dos, locale.getCountry()); |
| 327 | writeUTF(dos, locale.getVariant()); |
| 328 | |
| 329 | writeUTF(dos, address.getThoroughfare()); |
| 330 | int numAddressLines = address.getMaxAddressLineIndex(); |
| 331 | dos.writeInt(numAddressLines); |
| 332 | for (int i = 0; i < numAddressLines; ++i) { |
| 333 | writeUTF(dos, address.getAddressLine(i)); |
| 334 | } |
| 335 | writeUTF(dos, address.getFeatureName()); |
| 336 | writeUTF(dos, address.getLocality()); |
| 337 | writeUTF(dos, address.getAdminArea()); |
| 338 | writeUTF(dos, address.getSubAdminArea()); |
| 339 | |
| 340 | writeUTF(dos, address.getCountryName()); |
| 341 | writeUTF(dos, address.getCountryCode()); |
| 342 | writeUTF(dos, address.getPostalCode()); |
| 343 | writeUTF(dos, address.getPhone()); |
| 344 | writeUTF(dos, address.getUrl()); |
| 345 | |
| 346 | dos.flush(); |
| 347 | if (mGeoCache != null) { |
| 348 | mGeoCache.insert(locationKey, bos.toByteArray()); |
| 349 | } |
| 350 | dos.close(); |
| 351 | } |
| 352 | } else { |
| 353 | // Parsing the address from the byte stream. |
| 354 | DataInputStream dis = new DataInputStream( |
| 355 | new ByteArrayInputStream(cachedLocation)); |
| 356 | String language = readUTF(dis); |
| 357 | String country = readUTF(dis); |
| 358 | String variant = readUTF(dis); |
| 359 | Locale locale = null; |
| 360 | if (language != null) { |
| 361 | if (country == null) { |
| 362 | locale = new Locale(language); |
| 363 | } else if (variant == null) { |
| 364 | locale = new Locale(language, country); |
| 365 | } else { |
| 366 | locale = new Locale(language, country, variant); |
| 367 | } |
| 368 | } |
| 369 | if (!locale.getLanguage().equals(Locale.getDefault().getLanguage())) { |
| 370 | dis.close(); |
| 371 | return lookupAddress(latitude, longitude, false); |
| 372 | } |
| 373 | address = new Address(locale); |
| 374 | |
| 375 | address.setThoroughfare(readUTF(dis)); |
| 376 | int numAddressLines = dis.readInt(); |
| 377 | for (int i = 0; i < numAddressLines; ++i) { |
| 378 | address.setAddressLine(i, readUTF(dis)); |
| 379 | } |
| 380 | address.setFeatureName(readUTF(dis)); |
| 381 | address.setLocality(readUTF(dis)); |
| 382 | address.setAdminArea(readUTF(dis)); |
| 383 | address.setSubAdminArea(readUTF(dis)); |
| 384 | |
| 385 | address.setCountryName(readUTF(dis)); |
| 386 | address.setCountryCode(readUTF(dis)); |
| 387 | address.setPostalCode(readUTF(dis)); |
| 388 | address.setPhone(readUTF(dis)); |
| 389 | address.setUrl(readUTF(dis)); |
| 390 | dis.close(); |
| 391 | } |
| 392 | return address; |
| 393 | } catch (Exception e) { |
| 394 | // Ignore. |
| 395 | } |
| 396 | return null; |
| 397 | } |
| 398 | |
| 399 | private String valueIfEqual(String a, String b) { |
| 400 | return (a != null && b != null && a.equalsIgnoreCase(b)) ? a : null; |
| 401 | } |
| 402 | |
| 403 | public static final void writeUTF(DataOutputStream dos, String string) throws IOException { |
| 404 | if (string == null) { |
| 405 | dos.writeUTF(""); |
| 406 | } else { |
| 407 | dos.writeUTF(string); |
| 408 | } |
| 409 | } |
| 410 | |
| 411 | public static final String readUTF(DataInputStream dis) throws IOException { |
| 412 | String retVal = dis.readUTF(); |
| 413 | if (retVal.length() == 0) |
| 414 | return null; |
| 415 | return retVal; |
| 416 | } |
| 417 | } |