如何通过使用Android代码从JSON响应中获取特定值?

本文介绍了如何通过使用Android代码从JSON响应中获取特定值?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我需要获取特定对象值(A，B，C，D)和相关的键值(@"name" ).获取(A, B, C, D )对象值后，我需要列出到Android的列表视图中.在下面，我已经发布了示例代码和响应.请帮助我.

I need to get Particular Object values ( A, B, C, D) and related key values (@"name" ). After getting (A, B, C, D ) object values I need to list out into list view Android. Here below I have posted my sample code and response. Please help me.

@Override protected Void doInBackground(Void... arg0) { // Creating service handler class instance ServiceHandler sh = new ServiceHandler(); // Making a request to url and getting response String jsonStr = sh.makeServiceCall(url, ServiceHandler.GET); Log.d("Response: ", "> " + jsonStr); if (jsonStr != null) { try { JSONObject jsonObj = new JSONObject(jsonStr); contacts = jsonObj.getJSONArray("response"); Log.d("Response: ", "> " + contacts); // looping through All Contacts for (int i = 0; i < contacts.length(); i++) { JSONObject c = contacts.getJSONObject(i); } } catch (JSONException e) { e.printStackTrace(); } } else { Log.e("ServiceHandler", "Couldn't get any data from the url"); } return null; }

我的JSON响应:

{"response" : [ { "A" : [ { "name" : "tango" }, { "name" : "ping" } ], "B" : [ { "name" : "tango" }, { "name" : "ping" } ] } ]}

推荐答案

使用 JSONObject keys()来获取密钥，然后迭代每个密钥以获取动态值.

Use JSONObject keys() to get the key and then iterate each key to get to the dynamic value.

您可以获得像这样的动态键

You can get dynamic keys like this

JSONObject responseDataObj = new JSONObject(responseData); JSONArray responseArray = responseDataObj.getJSONArray("response"); for (int i = 0; i < responseArray.length(); i++) { nodes = new ArrayList<ArrayList<String>>();//nodes ArrayList<ArrayList<String>> declared globally nodeSize = new ArrayList<Integer>();//nodeSize ArrayList<Integer> declared globally JSONObject obj = responseArray.getJSONObject(i); Iterator keys = obj.keys(); while(keys.hasNext()) { // loop to get the dynamic key String currentDynamicKey = (String)keys.next(); //store key in an arraylist which is A,B,... // get the value of the dynamic key JSONArray currentDynamicValue = obj.getJSONArray(currentDynamicKey); int jsonrraySize = currentDynamicValue.length(); int sizeInArrayList = jsonrraySize + 1; nodeSize.add(sizeInArrayList); if(jsonrraySize > 0) { for (int ii = 0; ii < jsonrraySize; ii++) { nameList = new ArrayList<String>();//nameList ArrayList<String> declared globally if(ii == 0) { JSONObject nameObj = currentDynamicValue.getJSONObject(ii); String name = nameObj.getString("name"); System.out.print("Name = " + name); //store name in an arraylist nameList.add(name); } } } nodes.add(nameList); } }