1 package com.android.contacts.common.location; 2 3 import android.app.IntentService; 4 import android.content.Context; 5 import android.content.Intent; 6 import android.content.SharedPreferences; 7 import android.content.SharedPreferences.Editor; 8 import android.location.Address; 9 import android.location.Geocoder; 10 import android.location.Location; 11 import android.preference.PreferenceManager; 12 import android.util.Log; 13 14 import java.io.IOException; 15 import java.util.List; 16 17 /** 18 * Service used to perform asynchronous geocoding from within a broadcast receiver. Given a 19 * {@link Location}, convert it into a country code, and save it in shared preferences. 20 */ 21 public class UpdateCountryService extends IntentService { 22 private static final String TAG = UpdateCountryService.class.getSimpleName(); 23 24 private static final String ACTION_UPDATE_COUNTRY = "saveCountry"; 25 26 private static final String KEY_INTENT_LOCATION = "location"; 27 28 public UpdateCountryService() { 29 super(TAG); 30 } 31 32 public static void updateCountry(Context context, Location location) { 33 final Intent serviceIntent = new Intent(context, UpdateCountryService.class); 34 serviceIntent.setAction(ACTION_UPDATE_COUNTRY); 35 serviceIntent.putExtra(UpdateCountryService.KEY_INTENT_LOCATION, location); 36 context.startService(serviceIntent); 37 } 38 39 @Override 40 protected void onHandleIntent(Intent intent) { 41 if (ACTION_UPDATE_COUNTRY.equals(intent.getAction())) { 42 final Location location = (Location) intent.getParcelableExtra(KEY_INTENT_LOCATION); 43 final String country = getCountryFromLocation(getApplicationContext(), location); 44 45 if (country == null) { 46 return; 47 } 48 49 final SharedPreferences prefs = 50 PreferenceManager.getDefaultSharedPreferences(getApplicationContext()); 51 52 final Editor editor = prefs.edit(); 53 editor.putLong(CountryDetector.KEY_PREFERENCE_TIME_UPDATED, 54 System.currentTimeMillis()); 55 editor.putString(CountryDetector.KEY_PREFERENCE_CURRENT_COUNTRY, country); 56 editor.commit(); 57 } 58 } 59 60 /** 61 * Given a {@link Location}, return a country code. 62 * 63 * @return the ISO 3166-1 two letter country code 64 */ 65 private String getCountryFromLocation(Context context, Location location) { 66 final Geocoder geocoder = new Geocoder(context); 67 String country = null; 68 try { 69 final List<Address> addresses = geocoder.getFromLocation( 70 location.getLatitude(), location.getLongitude(), 1); 71 if (addresses != null && addresses.size() > 0) { 72 country = addresses.get(0).getCountryCode(); 73 } 74 } catch (IOException e) { 75 Log.w(TAG, "Exception occurred when getting geocoded country from location"); 76 } 77 return country; 78 } 79 } 80
