如何使用Google的GeoCoder Java客户端获取特定位置的经度和纬度？

问题描述

我正在尝试获取特定地址的经度和纬度。

这是使用我正在使用的地址作为地址的GeoCoded响应的结果。

{
   "results" : [
      {
         "address_components" : [
            {
               "long_name" : "1600","short_name" : "1600","types" : [ "street_number" ]
            },{
               "long_name" : "Amphitheatre Pkwy","short_name" : "Amphitheatre Pkwy","types" : [ "route" ]
            },{
               "long_name" : "Mountain View","short_name" : "Mountain View","types" : [ "locality","political" ]
            },{
               "long_name" : "Santa Clara County","short_name" : "Santa Clara County","types" : [ "administrative_area_level_2",{
               "long_name" : "California","short_name" : "CA","types" : [ "administrative_area_level_1",{
               "long_name" : "United States","short_name" : "US","types" : [ "country",{
               "long_name" : "94043","short_name" : "94043","types" : [ "postal_code" ]
            }
         ],"formatted_address" : "1600 Amphitheatre Parkway,Mountain View,CA 94043,USA","geometry" : {
            "location" : {
               "lat" : 37.4224764,"lng" : -122.0842499
            },"location_type" : "ROOFTOP","viewport" : {
               "northeast" : {
                  "lat" : 37.4238253802915,"lng" : -122.0829009197085
               },"southwest" : {
                  "lat" : 37.4211274197085,"lng" : -122.0855988802915
               }
            }
         },"place_id" : "ChIJ2eUgeAK6j4ARbn5u_wAGqWA","plus_code": {
            "compound_code": "CWC8+W5 Mountain View,California,United States","global_code": "849VCWC8+W5"
         },"types" : [ "street_address" ]
      }
   ],"status" : "OK"
}

我需要具体获取该地点的经度和纬度。我正在遵循代码here

我需要特定的JSON字段，以便可以在Java代码中使用它

解决方法

我找到了解决方法。

github页面中的代码显示：

GeoApiContext context = new GeoApiContext.Builder().apiKey("AIza...").build();
GeocodingResult[] results =  GeocodingApi.geocode(context,"1600 Amphitheatre Parkway Mountain View,CA 94043").await();
Gson gson = new GsonBuilder().setPrettyPrinting().create();
System.out.println(gson.toJson(results[0].addressComponents));

第四行仅访问JSON字符串的“ addressComponents”。为了获得纬度，我只需要使用相应的字段名称，并将上面代码的第四行替换为：

System.out.println(gson.toJson(results[0].geometry.location.lat));