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 UpdateCountryService()28 public UpdateCountryService() { 29 super(TAG); 30 } 31 updateCountry(Context context, Location location)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 onHandleIntent(Intent intent)40 protected void onHandleIntent(Intent intent) { 41 if (intent == null) { 42 Log.d(TAG, "onHandleIntent: could not handle null intent"); 43 return; 44 } 45 if (ACTION_UPDATE_COUNTRY.equals(intent.getAction())) { 46 final Location location = (Location) intent.getParcelableExtra(KEY_INTENT_LOCATION); 47 final String country = getCountryFromLocation(getApplicationContext(), location); 48 49 if (country == null) { 50 return; 51 } 52 53 final SharedPreferences prefs = 54 PreferenceManager.getDefaultSharedPreferences(getApplicationContext()); 55 56 final Editor editor = prefs.edit(); 57 editor.putLong(CountryDetector.KEY_PREFERENCE_TIME_UPDATED, 58 System.currentTimeMillis()); 59 editor.putString(CountryDetector.KEY_PREFERENCE_CURRENT_COUNTRY, country); 60 editor.commit(); 61 } 62 } 63 64 /** 65 * Given a {@link Location}, return a country code. 66 * 67 * @return the ISO 3166-1 two letter country code 68 */ getCountryFromLocation(Context context, Location location)69 private String getCountryFromLocation(Context context, Location location) { 70 final Geocoder geocoder = new Geocoder(context); 71 String country = null; 72 try { 73 final List<Address> addresses = geocoder.getFromLocation( 74 location.getLatitude(), location.getLongitude(), 1); 75 if (addresses != null && addresses.size() > 0) { 76 country = addresses.get(0).getCountryCode(); 77 } 78 } catch (IOException e) { 79 Log.w(TAG, "Exception occurred when getting geocoded country from location"); 80 } 81 return country; 82 } 83 } 84