ジオコーダー＆逆ジオコーダー Google API for Java

緯度・経度と住所の相互変換コード。
GoogleのAPIが便利。後は、LatLngに関係する情報をユーザに返すコードが出来れば、GPSとの連携ができる。

	public class GeocoderApp {
	public static String invGeocode(double lat, double lng){
	final Geocoder geocoder = new Geocoder();
	BigDecimal latB = new BigDecimal(lat);
	BigDecimal lngB = new BigDecimal(lng);
	LatLng location = new LatLng(latB, lngB);
	GeocoderRequest geocoderRequest = new GeocoderRequestBuilder().setLocation(location).setLanguage("ja").getGeocoderRequest();
	GeocodeResponse geocoderResponse = geocoder.geocode(geocoderRequest);
	GeocoderStatus status = geocoderResponse.getStatus();
	switch (status) {
	case ZERO_RESULTS:
	return null;
	case OVER_QUERY_LIMIT:
	case REQUEST_DENIED:
	case INVALID_REQUEST:
	case UNKNOWN_ERROR:
	case ERROR:
	throw new RuntimeException(status.value());
	default:
	}
	List<GeocoderResult> results = geocoderResponse.getResults();
	for (GeocoderResult result : results) {
	return result.getFormattedAddress();
	}
	return null;
	}
	public static LatLng geocode(String address) {
	final Geocoder geocoder = new Geocoder();
	GeocoderRequest geocoderRequest = new GeocoderRequestBuilder()
	.setAddress(address).setLanguage("ja")
	.getGeocoderRequest();
	GeocodeResponse geocoderResponse = geocoder.geocode(geocoderRequest);
	GeocoderStatus status = geocoderResponse.getStatus();
	switch (status) {
	case ZERO_RESULTS:
	return null;
	case OVER_QUERY_LIMIT:
	case REQUEST_DENIED:
	case INVALID_REQUEST:
	case UNKNOWN_ERROR:
	case ERROR:
	throw new RuntimeException(status.value());
	default:
	}
	List<GeocoderResult> results = geocoderResponse.getResults();
	for (GeocoderResult result : results) {
	GeocoderGeometry geometry = result.getGeometry();
	return geometry.getLocation();
	}
	return null;
	}
	}

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