在android中显示单数组json数据？

Question

我正在尝试在安卓应用程序中显示json数据，但我遇到了困难，我认为这可能与json文件的格式有关，因为我想要在headers数组中获取名称和代码的值。而且它不起作用

这是json文件

 {
"status": "SUCCESS",
"headers": 
{
"id": "4",
"name": "GLO",
"code": "GLO",
"background_color_code": "15B709",
"text_color_code": "ffffff",
"statusMessage": "Hi +234805, an ACCESS FEE of N20.00 will be charged in order to access this Platform"
},
"statusMessage": "Movies Loaded successfully",
"caption": "Discover"
}

这是java代码。

 protected ArrayList<HashMap<String, String>> doInBackground(Void... arg0) {

            ArrayList<HashMap<String, String>> categoryList = new ArrayList<HashMap<String, String>>();
            jParser = new JSONParser();

            JSONObject json = jParser.getJSONFromUrl(URL_CATEGORY);

            try {
                  JSONObject categories =json.getJSONObject("headers");

                   String state = categories.getString("name");
                    String status = categories.getString("code");

                    HashMap<String, String> map = new HashMap<String, String>();
                    map.put(TAG_PIC, state);
                    map.put(TAG_NOTE, status);
                    categoryList.add(map);


            }catch (Throwable e){
                e.printStackTrace();
            }
            return categoryList;
        }

这就是错误

07-25 11:05:50.766  15683-15697/com.example.cann I/System.out﹕ close [socket][/10.187.206.124:36118]
07-25 11:05:50.781  15683-15702/com.example.cann W/System.err﹕ org.json.JSONException: Value  at headers of type java.lang.String cannot be converted to JSONObject
07-25 11:05:50.782  15683-15702/com.example.cann W/System.err﹕ at org.json.JSON.typeMismatch(JSON.java:100)
07-25 11:05:50.782  15683-15702/com.example.cann W/System.err﹕ at org.json.JSONObject.getJSONObject(JSONObject.java:613)
07-25 11:05:50.782  15683-15702/com.example.cann W/System.err﹕ at com.example.cann.CategoryActivity$LoadComments.doInBackground(CategoryActivity.java:81)
07-25 11:05:50.782  15683-15702/com.example.cann W/System.err﹕ at com.example.cann.CategoryActivity$LoadComments.doInBackground(CategoryActivity.java:60)

Answer 1

您可以尝试使用

try {
    JSONObject reader = new JSONObject(Your_URL);
    JSONArray jsonArray = reader.getJSONArray("headers");

    for (int i = 0; i < jsonArray.length(); i++) {
        JSONObject e = jsonArray.getJSONObject(i);
        String name= e.getString("name");
    }
} catch (JSONException e) {
    e.printStackTrace();
}

Answer 2

尝尝这个

 try {
        JSONObject rootJsonObject = new JSONObject(response);
        if (rootJsonObject.getString("status").equalsIgnoreCase("SUCCESS")) {
            JSONObject headerJsonObject = new JSONObject(rootJsonObject.getString("headers"));
            String name = headerJsonObject.getString("name");
            String code = headerJsonObject.getString("code");
        }
    } catch (JSONException e) {
        e.printStackTrace();
    }

Answer 3

您可以使用Gson (Complete Tutorial)或Jackson (Complete Tutorial)