Question

我的版本是Android 2.2 Google API 8，我是从模拟器运行的。我正在尝试在此JSON对象中尝试访问位置。我使用

后得到这个

 InputStream instream = entity.getContent();

 JSONObject myAwway = new JSONObject(convertStreamToString(instream));

Google文档说它会返回一个数组，但周围有花括号它看起来像一个对象。

我需要在位置字段中访问lat和lon并存储为双精度。

我已经搜索过，但似乎只能找到简单文件的帮助。

{
   "results" : [
      {
         "address_components" : [
            {
               "long_name" : "20059",
               "short_name" : "20059",
               "types" : [ "postal_code" ]
            },
            {
               "long_name" : "Washington D.C.",
               "short_name" : "Washington D.C.",
               "types" : [ "locality", "political" ]
            },
            {
               "long_name" : "District of Columbia",
               "short_name" : "DC",
               "types" : [ "administrative_area_level_1", "political" ]
            },
            {
               "long_name" : "United States",
               "short_name" : "US",
               "types" : [ "country", "political" ]
            }
         ],
         "formatted_address" : "Washington D.C., DC 20059, USA",
         "geometry" : {
            "bounds" : {
               "northeast" : {
                  "lat" : 38.924920,
                  "lng" : -77.0178720
               },
               "southwest" : {
                  "lat" : 38.9189910,
                  "lng" : -77.02261200000001
               }
            },
            "location" : {
               "lat" : 38.92177780,
               "lng" : -77.01974260
            },
            "location_type" : "APPROXIMATE",
            "viewport" : {
               "northeast" : {
                  "lat" : 38.92510312068017,
                  "lng" : -77.01709437931984
               },
               "southwest" : {
                  "lat" : 38.91880787931983,
                  "lng" : -77.02338962068018
               }
            }
         },
         "types" : [ "postal_code" ]
      }
   ],
   "status" : "OK"
}

Answer 1

JSONObject jObject = new JSONObject(convertStreamToString(instream));
JSONArray results = jObject.getJSONArray("result");
JSONObject geometry = results.getJSONObject(2);
JSONObject bounds = geometry.getJSONObject("bounds");
JSONObject northeast = geometry.getJSONObject("northeast");

double nLat = Double.parseDouble(northeast.getString("lat").toString());
double nLng = Double.parseDouble(northeast.getString("lng").toString());

那应该给你东北的lat / lng作为双打。东南部就像东南部一样取代东北部。

Answer 2

JSONObject location = myAwway.getJSONArray("results").getJSONObject(0).getJSONObject("geometry").getJSONObject("location");
double lat = location.getDouble("lat");
double lng = location.getDouble("lng");

'结果'JSONArray可能是Google文档建议的数组。他们刚刚将其包装在具有状态的JSONObject中，以便您可以在尝试处理返回的值之前检查状态。

Android - 如何解析JSONObject和JSONArrays

2 个答案: