JSONException而轉換成JSONArray

Question

我從我在我通過服務，並以發送到我的活動Android應用程序服務器獲得一個JSONObject我轉換的JSONObject的字符串

String myjson= gson.toJson(object); 
b.putString("json", myjson); 

和字符串傳遞給我的活動在這裏我從字符串重新創建JSONObject的

Gson gson = new Gson(); 
JSONObject jobj = gson.fromJson(mydata, JSONObject.class); 
JSONArray jarray = jobj.getJSONArray("myitems"); 

我的JSON是如下

{"myitems":[{"event_id":"1","title":"Music launch party at makeover","description":"Music Launch function at Makeover","store_id":"2","user_id":"1","category_id":"1","submittedby":"store","start_date":"2015-02-03 09:00:01","end_date":"2015-02-03 20:00:00","price":"1000","gallery_1":"","gallery_2":"","gallery_3":"","add_lat":"30.693771","add_lon":"76.76486","distance":"10.329089177806534"},{"event_id":"2","title":"The Bacardi party at the New year bash","description":"Altius organizes a new year bash at their Night House.","store_id":"2","user_id":"1","category_id":"3","submittedby":"user","start_date":"2015-02-05 17:08:40","end_date":"2015-02-05 22:08:48","price":"2000","gallery_1":"","gallery_2":"","gallery_3":"","add_lat":"30.69461","add_lon":"76.76176","distance":"10.575941394542852"}]} 

但是我得到jsonobject jsonarray錯誤。從jsonobject獲取jsonarray的正確方式是什麼或者我在這裏做了什麼錯誤。

Answer 1

嘗試以下操作：

1. 創建包含JSON的副本的類的對象

    
   public class MyItem {
    
   
   String event_id; 
   String title; 
   String description; 
   String store_id ; 
   String user_id; 
   String category_id; 
   String submittedby; 
   String start_date; 
   String end_date; 
   String price; 
   String gallery_1; 
   String gallery_2; 
   String gallery_3; 
   String add_lat; 
   String add_lon; 
   String distance;
    
   
   public MyItem() { 
   } 
   }

2. In your case myjson is the string containing the json reply..so

    JSONArray array = null; 
   
        try { 
         JSONObject jsonResp = new JSONObject(myjson); 
         array = jsonResp.getJSONArray("myitems"); 
   
        } catch (JSONException e) { 
   
         e.printStackTrace(); 
        } 
   

3. 然後你就可以通過自定義類的陣列和存儲對象，像這樣重複：

for（int i = 0; i < array.length（）; i ++）{ JSONObject json2 = null;

try { json2 = (JSONObject) array.get(i); } catch (JSONException e) { e.printStackTrace(); } Gson gson = new Gson(); MyItem myItem = gson.fromJson(json2.toString(), MyItem.class); //Do whatever you want with the object here

}