Android Volley - 在JSON中檢查數組以獲取值

Question

我有一個包含String數組（選民列表）的JSON對象。

這裏是JSON陣列

http://jsonviewer.stack.hu/#http://www.saveme.ie/api/savings/

我的邏輯是這樣

獲得數組轉換成一個JSONObject。

將JSON中的數組分配給列表並檢查值的列表。

String singleSaving = ""; 
ArrayList upVoters = new ArrayList(); 

// Loop through all and get single ID 
for (int i = 0; i < response.length(); i++) { 
    JSONObject obj = null; 
    try { 
     obj = response.getJSONObject(i); 
     _id2 = obj.getString("_id"); 

     if (_id2.equals(_id)) { 
      singleSaving = _id2; 

      // Id like to assign the upVoters array to       
      // the upVoters ArrayList here 

     } 
    } catch (JSONException e) { 
     e.printStackTrace(); 
    } 
} 

Answer 1

你只需要遍歷upVotersJSONArray，並填補了ArrayList：

String singleSaving = ""; 
ArrayList upVoters = new ArrayList(); 

// Loop through all and get single ID 
for (int i = 0; i < response.length(); i++) { 
    JSONObject obj = null; 
    try { 
     obj = response.getJSONObject(i); 
     _id2 = obj.getString("_id"); 

     if (_id2.equals(_id)) { 
      singleSaving = _id2; 

      // Get upVoters list as JSONArray 
      JSONArray upVotersJsonArray = obj.getJSONArray("upVoters"); 
      for(int j=0; j<upVotersJsonArray.length(); j++) { 
       // Fill ArrayList with data from JSON 
       upVoters.add(upVotersJsonArray.getString(j)); 
      }  
     } 
    } catch (JSONException e) { 
     e.printStackTrace(); 
    } 
}