Kemo Kemo - 1 year ago 202
Java Question

Geocoder often returns null vallues in Android

I am trying to pass geocoder values from MapFragment to LocationDetailsActivity.

I get the correct values for lat and lng, but when I try to display any of the other values, most of the times I get null values instead of the city and zip (but not always), while a lot of the times I get the correct country and state (also not always).

MapFragment Code:

// Set default latitude and longitude
double latitude = 15.4825766;
double longitude = -5.0076589;

// Get latitude and longitude of the current location and a LatLng object
if (myLocation != null) {
latitude = myLocation.getLatitude();
longitude = myLocation.getLongitude();

mMap.setOnMapLongClickListener(new GoogleMap.OnMapLongClickListener() {

public void onMapLongClick(LatLng arg0) {

Geocoder geocoder = new Geocoder(getActivity(), Locale.getDefault());
try {
List<Address> allAddresses = geocoder.getFromLocation(arg0.latitude, arg0.longitude, 1);
if (allAddresses.size() > 0 && allAddresses != null) {
Address address = allAddresses.get(0);
Intent intent = new Intent(getActivity(), LocationDetailsActivity.class);
intent.putExtra("latitude", arg0.latitude);
intent.putExtra("longitude", arg0.longitude);
intent.putExtra("city", allAddresses.get(0).getLocality());
intent.putExtra("zip", allAddresses.get(0).getPostalCode());
intent.putExtra("state", allAddresses.get(0).getAdminArea());
intent.putExtra("country", allAddresses.get(0).getCountryName());
} catch (IOException e) {

LocationDetailsActivity Code:

Bundle bundle = getIntent().getExtras();
double lat = bundle.getDouble("latitude");
double lng = bundle.getDouble("longitude");
String city = intent.getStringExtra("city");
String zip = intent.getStringExtra("zip");
String state = intent.getStringExtra("state");
String country = intent.getStringExtra("country");

// I display my values here

Answer Source

Android's geocoding api is pretty unreliable up-to my experience, I usually make a request to the Google's geocoding webservices on Url : "" (If you are familiar with retrofit)

    void reverseGeoCode(@Query("latlng") String latlng, @Query("language") String language,
                        @Query("key") String key, Callback<ReverseGeoCode> callback);

latlng The latitude and longitude you want to reverse geocode.

language language of the geocoded response

key Your Api key

Go here for more info

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