Question

以下是网络服务的网址：

http://watsmo.com/clients/techmate/getCity.php

它以下列格式返回JSON数据：

{  
   "Andhra Pradesh":{  
      "37":"Anantapur",
      "48":"Bhimavaram",
      "183":"Chittoor",
      "191":"Eluru",
      "52":"Guntur",
      "50":"Kakinada",
      "185":"Karnul",
      "16":"Rajahmundry",
      "182":"Tirupati",
      "17":"Vijaywada",
      "18":"Visakhapatnam",
      "201":"Vizianagram"
   },
   "Bihar":{  
      "88":"Patna"
   },
   "Chhattisgarh":{  
      "163":"Bhillai",
      "164":"Bilaspur",
      "161":"Raipur"
   },
   "Delhi":{  
      "68":"Delhi",
      "61":"New delhi"
   },
   "Gujarat":{  
      "6":"Ahmedabad",
      "173":"Bhavnagar",
      "172":"Jamnagar",
      "136":"Rajkot",
      "170":"Surat",
      "8":"Vadodara"
   }
}

此JSON包含州和相应城市的名称。

我想用两个微调器创建一个活动，第一个包含状态名称，另一个包含与第一个微调器中选择的状态相对应的城市名称。我不可能对此进行硬编码，我无法弄清楚如何使用Web服务执行此操作。请帮我解决一下这个。谢谢！

Answer 1

为arrayList

创建一个全局变量

 ArrayList<String> keysOfJson=new ArrayList();

现在，在获取jsonObject后，请查看是否有帮助

 keysOfJson.clear();
 Iterator<String> iterator = jsonObject.keys();
 while (iterator.hasNext()) {
     String key = iterator.next();
     if (jsonObject.get(key) instanceof JSONObject ) {
         JSONObject object= jsonObject.getJSONObject(key);
         if (!keysOfJson.contains(key)) {
             keysOfJson.add(key);
             }
         }
     }

Answer 2

HashMap<int,ArrayList<String>> hmData=new HashMap<>();
for(int i=0;i<response.length();i++)
{

JSONObject jobj1=response.getJsonObject(i)
ArrayList<String> alcities=new ArrayList<>();
for(int j=0;j<jobj2.length()){
 JSONObject jobj2=jobj1.getJsonObject(j);
alcities.add(jobj2.optString(jobj2));
}
hm.put(i,alcities);
//parse the cities from json object and store all cities.

}

注意：没有执行，但这可以给你一个粗略的想法。

Answer 3

您可以从这个类似的[问题]中获取帮助：Extract JsonObject inbetween another JsonObject

选中此项以解决您的问题。

Answer 4

可能会帮到你。获取不同的城市名称和州名列表以设置到微调器

public static Map<String, Object> jsonToMap(JSONObject json) throws JSONException {
        Map<String, Object> retMap = new HashMap<String, Object>();

        if(json != JSONObject.NULL) {
            retMap = toMap(json);
        }
        return retMap;
    }

    public static Map<String, Object> toMap(JSONObject object) throws JSONException {
        Map<String, Object> map = new HashMap<String, Object>();

        Iterator<String> keysItr = object.keys();
        while(keysItr.hasNext()) {
            String key = keysItr.next();
            Object value = object.get(key);

            if(value instanceof JSONArray) {
                value = toList((JSONArray) value);
            }

            else if(value instanceof JSONObject) {
                value = toMap((JSONObject) value);
            }
            map.put(key, value);
        }
        return map;
    }

    public static List<Object> toList(JSONArray array) throws JSONException {
        List<Object> list = new ArrayList<Object>();
        for(int i = 0; i < array.length(); i++) {
            Object value = array.get(i);
            if(value instanceof JSONArray) {
                value = toList((JSONArray) value);
            }

            else if(value instanceof JSONObject) {
                value = toMap((JSONObject) value);
            }
            list.add(value);
        }
        return list;
    }

这两个方法用于将您的json响应转换为两个

的Map Object

Key（String）：State Name
价值（地图）：CityId，CityName

现在您可以分为状态数组和城市数组（CityId，城市名称）

private void makeJsonObjectRequest() {

        showpDialog();

        JsonObjectRequest jsonObjReq = new JsonObjectRequest(Request.Method.GET,
                urlJsonObj, null, new Response.Listener<JSONObject>() {

            @Override
            public void onResponse(JSONObject response) {
                Log.d(TAG, response.toString());

                try {
                    Map<String, Object> stringObjectMap =  jsonToMap(response);
                    ArrayList<String> statesName = new ArrayList<>();
                    ArrayList<City> finalcityArrayList= new ArrayList<>();
                    HashMap<String,String> mCityHashMap = new HashMap<>();
                    ArrayList<City> cityArrayList = new ArrayList<>();
                    for ( String key : stringObjectMap.keySet() ) {
                        System.out.println( key );
                        statesName.add(key);
                        mCityHashMap = ( HashMap<String,String>) stringObjectMap.get(key);
                        mCityHashMap.keySet().toArray();
                        mCityHashMap.values().toArray();

                        cityArrayList= new ArrayList<>();
                        HashMap<String,String> childCityHashMap = new HashMap<>();
                        for(String cityNumber: mCityHashMap.keySet()){
                           // childCityHashMap = (HashMap<String,String>) mCityHashMap.get(cityNumber);
                            City city = new City();
                            String strname  = mCityHashMap.get(cityNumber);
                            Log.e("TAG","" + strname);
                            city.setId(cityNumber);
                            city.setName(mCityHashMap.get(cityNumber));
                            cityArrayList.add(city);
                        }
                        finalcityArrayList.addAll(cityArrayList);

                    }

                      Log.e("TAG","State Names "+statesName.size());
                Log.e("TAG","City Names"+finalcityArrayList.size());


                } catch (JSONException e) {
                    e.printStackTrace();
                    Toast.makeText(getApplicationContext(),
                            "Error: " + e.getMessage(),
                            Toast.LENGTH_LONG).show();
                }
                hidepDialog();
            }
        }, new Response.ErrorListener() {

            @Override
            public void onErrorResponse(VolleyError error) {
                VolleyLog.d(TAG, "Error: " + error.getMessage());
                Toast.makeText(getApplicationContext(),
                        error.getMessage(), Toast.LENGTH_SHORT).show();
                // hide the progress dialog
                hidepDialog();
            }
        });

        // Adding request to request queue
        SpinnerApp.getInstance().addToRequestQueue(jsonObjReq);
    }

从Web服务获取数据并将其存储在数组列表中

4 个答案: