我使用getLocationManager作为以下代码在地图中显示了位置（纬度和经度）。我怎样才能获得位置名称（反向地理编码？
final MapContainer cnt = new MapContainer();
cnt.setCameraPosition(new Coord(lat, lng));
cnt.addMarker(
EncodedImage.createFromImage(markerImg, false),
new Coord(lat, lng),
"marker",
"Optional long description",
evt -> {
}
);
cnt.zoom(new Coord(lat, lng), 15);
Container mapParent = new Container(new BorderLayout());
Label mapPosition = new Label("");
mapPosition .setText(lat + ", " + lng);//name of the place instead of lat, long here
if (lat == 0) {
mapPosition .setText("Location n/a. Please go outside and check in again");
}
GPS值
public final void checkGPS() {
if (Display.getInstance().getLocationManager().isGPSDetectionSupported()) {
LocationManager.getLocationManager().setLocationListener(new LocationListener() {
@Override
public void locationUpdated(Location location) {
loc = location;
lat = location.getLatitude();
lng = location.getLongitude();
}
@Override
public void providerStateChanged(int newState) {
}
});
} else {
}
}
更新
public static void nameMyCurrentLocation(Location l) {
if (l == null) {
return;
}
if (lastLocationRequest != null) {
lastLocationRequest.kill();
}
lastLocationRequest = Rest.get("https://maps.googleapis.com/maps/api/geocode/json").
queryParam("latlng", 27.700769 + "," + 85.300140).
queryParam("key", "AIzaSyCnWurwIKdfqXLsrWakuI2Boc9kdiQ9xhI").
queryParam("language", "en").
queryParam("result_type", "street_address|point_of_interest").
getAsJsonMap(callbackMap -> {
Map data = callbackMap.getResponseData();
System.out.println("xxx " + data);
if (data != null) {
ArrayList results = (ArrayList) data.get("results");
if (results != null && results.size() > 0) {
Map firstResult = (Map) results.get(0);
name.onSucess((String) firstResult.get("formatted_address"));
// System.out.println("geo location " + firstResult);
}
}
});
}
输出：
xxx {results = []，status = ZERO_RESULTS}
从文档中： “ZERO_RESULTS”表示地理编码成功但未返回任何结果。如果地理编码器传递了一个不存在的地址，则可能会发生这种情况。
lat长期存在的任何东西，我也尝试了其他东西，但都给出了zero_results状态错误。那是为什么？
删除此行后的Json输出“queryParam（”result_type“，”street_address | point_of_interest“）”
{
"results" : [
{
"address_components" : [
{
"long_name" : "Wyawasayi Galli",
"short_name" : "Wyawasayi Galli",
"types" : [ "route" ]
},
{
"long_name" : "Kalimati",
"short_name" : "Kalimati",
"types" : [ "political", "sublocality", "sublocality_level_1" ]
},
{
"long_name" : "Kathmandu",
"short_name" : "Kathmandu",
"types" : [ "locality", "political" ]
},
{
"long_name" : "Bagmati",
"short_name" : "Bagmati",
"types" : [ "administrative_area_level_2", "political" ]
},
{
"long_name" : "Central Development Region",
"short_name" : "Central Development Region",
"types" : [ "administrative_area_level_1", "political" ]
},
{
"long_name" : "Nepal",
"short_name" : "NP",
"types" : [ "country", "political" ]
},
{
"long_name" : "44600",
"short_name" : "44600",
"types" : [ "postal_code" ]
}
],
"formatted_address" : "Wyawasayi Galli, Kathmandu 44600, Nepal",
"geometry" : {
"bounds" : {
"northeast" : {
"lat" : 27.7015015,
"lng" : 85.299655
},
"southwest" : {
"lat" : 27.7007815,
"lng" : 85.2991827
}
},
"location" : {
"lat" : 27.7011091,
"lng" : 85.29936099999999
},
"location_type" : "GEOMETRIC_CENTER",
"viewport" : {
"northeast" : {
"lat" : 27.7024904802915,
"lng" : 85.30076783029152
},
"southwest" : {
"lat" : 27.6997925197085,
"lng" : 85.2980698697085
}
}
},
"place_id" : "ChIJCTorGFkY6zkRqRH2VjYvqg8",
"types" : [ "route" ]
},
{
"address_components" : [
{
"long_name" : "Tankeshwor",
"short_name" : "Tankeshwor",
"types" : [ "neighborhood", "political" ]
},
{
"long_name" : "Kalimati",
"short_name" : "Kalimati",
"types" : [ "political", "sublocality", "sublocality_level_1" ]
},
{
"long_name" : "Kathmandu",
"short_name" : "Kathmandu",
"types" : [ "locality", "political" ]
},
{
"long_name" : "Kathmandu",
"short_name" : "Kathmandu",
"types" : [ "administrative_area_level_3", "political" ]
},
{
"long_name" : "Bagmati",
"short_name" : "Bagmati",
"types" : [ "administrative_area_level_2", "political" ]
},
{
"long_name" : "Central Development Region",
"short_name" : "Central Development Region",
"types" : [ "administrative_area_level_1", "political" ]
},
{
"long_name" : "Nepal",
"short_name" : "NP",
"types" : [ "country", "political" ]
},
{
"long_name" : "44600",
"short_name" : "44600",
"types" : [ "postal_code" ]
}
],
"formatted_address" : "Tankeshwor, Kathmandu 44600, Nepal",
"geometry" : {
"bounds" : {
"northeast" : {
"lat" : 27.7013451,
"lng" : 85.30279759999999
},
"southwest" : {
"lat" : 27.6981819,
"lng" : 85.2992313
}
},
"location" : {
"lat" : 27.6993036,
"lng" : 85.30166509999999
},
"location_type" : "APPROXIMATE",
"viewport" : {
"northeast" : {
"lat" : 27.7013451,
"lng" : 85.30279759999999
},
"southwest" : {
"lat" : 27.6981819,
"lng" : 85.2992313
}
}
},
"place_id" : "ChIJjeLvm1kY6zkRA1w61Yedm_E",
"types" : [ "neighborhood", "political" ]
},
{
"address_components" : [
{
"long_name" : "Kalimati",
"short_name" : "Kalimati",
"types" : [ "political", "sublocality", "sublocality_level_1" ]
},
{
"long_name" : "Kathmandu",
"short_name" : "Kathmandu",
"types" : [ "locality", "political" ]
},
{
"long_name" : "Bagmati",
"short_name" : "Bagmati",
"types" : [ "administrative_area_level_2", "political" ]
},
{
"long_name" : "Central Development Region",
"short_name" : "Central Development Region",
"types" : [ "administrative_area_level_1", "political" ]
},
{
"long_name" : "Nepal",
"short_name" : "NP",
"types" : [ "country", "political" ]
},
{
"long_name" : "44600",
"short_name" : "44600",
"types" : [ "postal_code" ]
}
],
"formatted_address" : "Kalimati, Kathmandu 44600, Nepal",
"geometry" : {
"bounds" : {
"northeast" : {
"lat" : 27.7047408,
"lng" : 85.3029018
},
"southwest" : {
"lat" : 27.6933613,
"lng" : 85.2812261
}
},
"location" : {
"lat" : 27.6999738,
"lng" : 85.2890594
},
"location_type" : "APPROXIMATE",
"viewport" : {
"northeast" : {
"lat" : 27.7047408,
"lng" : 85.3029018
},
"southwest" : {
"lat" : 27.6933613,
"lng" : 85.2812261
}
}
},
"place_id" : "ChIJhdMirmAY6zkRUu9MKOhEJHw",
"types" : [ "political", "sublocality", "sublocality_level_1" ]
},
{
"address_components" : [
{
"long_name" : "Kathmandu",
"short_name" : "Kathmandu",
"types" : [ "locality", "political" ]
},
{
"long_name" : "Bagmati",
"short_name" : "Bagmati",
"types" : [ "administrative_area_level_2", "political" ]
},
{
"long_name" : "Central Development Region",
"short_name" : "Central Development Region",
"types" : [ "administrative_area_level_1", "political" ]
},
{
"long_name" : "Nepal",
"short_name" : "NP",
"types" : [ "country", "political" ]
},
{
"long_name" : "44600",
"short_name" : "44600",
"types" : [ "postal_code" ]
}
],
"formatted_address" : "Kathmandu 44600, Nepal",
"geometry" : {
"bounds" : {
"northeast" : {
"lat" : 27.7499367,
"lng" : 85.37316799999999
},
"southwest" : {
"lat" : 27.667984,
"lng" : 85.2790976
}
},
"location" : {
"lat" : 27.7172453,
"lng" : 85.3239605
},
"location_type" : "APPROXIMATE",
"viewport" : {
"northeast" : {
"lat" : 27.7499367,
"lng" : 85.37316799999999
},
"southwest" : {
"lat" : 27.667984,
"lng" : 85.2790976
}
}
},
"place_id" : "ChIJv6p7MIoZ6zkR6rGN8Rt8E7U",
"types" : [ "locality", "political" ]
},
{
"address_components" : [
{
"long_name" : "Kathmandu",
"short_name" : "Kathmandu",
"types" : [ "administrative_area_level_3", "political" ]
},
{
"long_name" : "Bagmati",
"short_name" : "Bagmati",
"types" : [ "administrative_area_level_2", "political" ]
},
{
"long_name" : "Central Development Region",
"short_name" : "Central Development Region",
"types" : [ "administrative_area_level_1", "political" ]
},
{
"long_name" : "Nepal",
"short_name" : "NP",
"types" : [ "country", "political" ]
}
],
"formatted_address" : "Kathmandu, Nepal",
"geometry" : {
"bounds" : {
"northeast" : {
"lat" : 27.822074,
"lng" : 85.59104929999999
},
"southwest" : {
"lat" : 27.5661126,
"lng" : 85.18833169999999
}
},
"location" : {
"lat" : 27.7306785,
"lng" : 85.37562489999999
},
"location_type" : "APPROXIMATE",
"viewport" : {
"northeast" : {
"lat" : 27.822074,
"lng" : 85.59104929999999
},
"southwest" : {
"lat" : 27.5661126,
"lng" : 85.18833169999999
}
}
},
"place_id" : "ChIJe-_b6Swa6zkRZCTiGTJNiYs",
"types" : [ "administrative_area_level_3", "political" ]
},
{
"address_components" : [
{
"long_name" : "44600",
"short_name" : "44600",
"types" : [ "postal_code" ]
},
{
"long_name" : "Bagmati",
"short_name" : "Bagmati",
"types" : [ "administrative_area_level_2", "political" ]
},
{
"long_name" : "Central Development Region",
"short_name" : "Central Development Region",
"types" : [ "administrative_area_level_1", "political" ]
},
{
"long_name" : "Nepal",
"short_name" : "NP",
"types" : [ "country", "political" ]
}
],
"formatted_address" : "44600, Nepal",
"geometry" : {
"bounds" : {
"northeast" : {
"lat" : 27.8106869,
"lng" : 85.56890489999999
},
"southwest" : {
"lat" : 27.5464805,
"lng" : 85.1869583
}
},
"location" : {
"lat" : 27.7292955,
"lng" : 85.3342973
},
"location_type" : "APPROXIMATE",
"viewport" : {
"northeast" : {
"lat" : 27.8106869,
"lng" : 85.56890489999999
},
"southwest" : {
"lat" : 27.5464805,
"lng" : 85.1869583
}
}
},
"place_id" : "ChIJRb9Q-QwZ6zkRkfX_MNEacMA",
"types" : [ "postal_code" ]
},
{
"address_components" : [
{
"long_name" : "Bagmati",
"short_name" : "Bagmati",
"types" : [ "administrative_area_level_2", "political" ]
},
{
"long_name" : "Central Development Region",
"short_name" : "Central Development Region",
"types" : [ "administrative_area_level_1", "political" ]
},
{
"long_name" : "Nepal",
"short_name" : "NP",
"types" : [ "country", "political" ]
}
],
"formatted_address" : "Bagmati, Nepal",
"geometry" : {
"bounds" : {
"northeast" : {
"lat" : 28.3420049,
"lng" : 86.06501
},
"southwest" : {
"lat" : 27.3182049,
"lng" : 84.62609499999999
}
},
"location" : {
"lat" : 28.0367577,
"lng" : 85.4375574
},
"location_type" : "APPROXIMATE",
"viewport" : {
"northeast" : {
"lat" : 28.3420049,
"lng" : 86.06501
},
"southwest" : {
"lat" : 27.3182049,
"lng" : 84.62609499999999
}
}
},
"place_id" : "ChIJ_wJv86_i6jkRESgJiF7pmkQ",
"types" : [ "administrative_area_level_2", "political" ]
},
{
"address_components" : [
{
"long_name" : "Central Development Region",
"short_name" : "Central Development Region",
"types" : [ "administrative_area_level_1", "political" ]
},
{
"long_name" : "Nepal",
"short_name" : "NP",
"types" : [ "country", "political" ]
}
],
"formatted_address" : "Central Development Region, Nepal",
"geometry" : {
"bounds" : {
"northeast" : {
"lat" : 28.3856697,
"lng" : 86.57675309999999
},
"southwest" : {
"lat" : 26.5699095,
"lng" : 83.921021
}
},
"location" : {
"lat" : 27.4695853,
"lng" : 85.2722472
},
"location_type" : "APPROXIMATE",
"viewport" : {
"northeast" : {
"lat" : 28.3856697,
"lng" : 86.57675309999999
},
"southwest" : {
"lat" : 26.5699095,
"lng" : 83.921021
}
}
},
"place_id" : "ChIJ0WrE8HZH6zkRAraslrlk0_M",
"types" : [ "administrative_area_level_1", "political" ]
},
{
"address_components" : [
{
"long_name" : "Nepal",
"short_name" : "NP",
"types" : [ "country", "political" ]
}
],
"formatted_address" : "Nepal",
"geometry" : {
"bounds" : {
"northeast" : {
"lat" : 30.4469452,
"lng" : 88.20152569999999
},
"southwest" : {
"lat" : 26.3479661,
"lng" : 80.05846980000001
}
},
"location" : {
"lat" : 28.394857,
"lng" : 84.12400799999999
},
"location_type" : "APPROXIMATE",
"viewport" : {
"northeast" : {
"lat" : 30.4469452,
"lng" : 88.20152569999999
},
"southwest" : {
"lat" : 26.3479661,
"lng" : 80.05846980000001
}
}
},
"place_id" : "ChIJz2gufcfolTkR3obM0LyaojQ",
"types" : [ "country", "political" ]
}
],
"status" : "OK"
}
答案 0 :(得分：0)
由于Uber clone I've been building for our online course我已经得到了这个确切的代码，所以只需用你自己的地理编码网络服务密钥替换GOOGLE_GEOCODING_KEY。
private static ConnectionRequest lastLocationRequest;
public static void nameMyCurrentLocation(Location l, SuccessCallback<String> name) {
if(l == null) {
return;
}
if(lastLocationRequest != null) {
lastLocationRequest.kill();
}
lastLocationRequest = Rest.get("https://maps.googleapis.com/maps/api/geocode/json").
queryParam("latlng", l.getLatitude() + "," + l.getLongitude()).
queryParam("key", GOOGLE_GEOCODING_KEY).
queryParam("language", "en").
queryParam("result_type", "street_address|point_of_interest").
getAsJsonMap(callbackMap -> {
Map data = callbackMap.getResponseData();
if(data != null) {
List results = (List)data.get("results");
if(results != null && results.size() > 0) {
Map firstResult = (Map)results.get(0);
name.onSucess((String)firstResult.get("formatted_address"));
}
}
});
}