无法使用Volley将JSONArray转换为JSONObject

时间:2013-12-14 10:35:24

标签: android web-services android-volley android-json

我正在尝试使用Volley来使用Web服务。这是我的logcat输出:

  

12-14 10:45:41.750:I / Annuaire2error(4005):org.json.JSONException:Value [{“label”:[{“pers_nom”:“yen”,“pers_id”:“1”, “pers_prenom”: “分级表”, “pers_email”: “yen98.ines@gmail.com”, “pers_phone”: “443456784”},{ “pers_nom”: “悯”, “pers_id”: “2”,“pers_prenom “:”Derkok“,”pers_email“:”jamin.drk23 @ gmail.com“,”pers_phone“:”2345512398“}]}]类型org.json.JSONArray无法转换为JSONObject

它似乎无法访问我的网络服务label的值。如何从JSONArray转换为JSONObject

这是我的代码:

mRequestQueue = Volley.newRequestQueue(getActivity().getApplicationContext());

JsonObjectRequest jr = new JsonObjectRequest(Request.Method.GET,url,null,new Response.Listener<JSONObject>() {
    @Override
    public void onResponse(JSONObject response) {
        Log.i(TAG,response.toString());
        try{
            JSONObject value = response.getJSONObject("label");
            String essai = value.getString("pers_nom");
            /**
             * just for check 
             * */
            Toast.makeText(getActivity(), ""+essai, Toast.LENGTH_SHORT).show();
            Log.d("volley output", essai);
        } catch(Exception e) {
            e.printStackTrace();
        }
    }
},new Response.ErrorListener() {
    @Override
    public void onErrorResponse(VolleyError error) {
        Toast.makeText(getActivity(), "errrrroooor", Toast.LENGTH_LONG).show(); 
        Log.i(TAG+"error",error.getMessage());
    }
});

mRequestQueue.add(jr);

1 个答案:

答案 0 :(得分:4)

您获得的响应是​​JSONArray而不是JSONObject

public void onResponse(JSONObject response)// resposne should be JSONArray
// Change it to JSONArray

JSONObject value = response.getJSONObject("label"); // wrong
// label is a json array

你的json

[ // json array node 
    { // json object node 
        "label": [ // json array label
            {
                "pers_nom": "yen",
                "pers_id": "1",
                "pers_prenom": "ines",
                "pers_email": "yen98.ines@gmail.com",
                "pers_phone": "443456784"
            },
            {
                "pers_nom": "Jamin",
                "pers_id": "2",
                "pers_prenom": " Derkok",
                "pers_email": "jamin.drk23@gmail.com",
                "pers_phone": "2345512398"
            }
        ]
    }
]

应该像

 @Override
 public void onResponse(JSONArray response) {
 Log.i(TAG,response.toString());
 try{
  JSONObject value = response.getJSONObject(0);
  JSONArray jr = value.getJSONArray("label");
  for(int i=0;i<jr.length();i++)
  {
  JSONObject jb = (JSONObject) jr.get(i);
  String pers_nom = jb.getString("pers_nom"); 
  Log.i(".........",pers_nom);
  ...// similarly for id and so on..  
  }
  ...// rest of the code

编辑:

 Response.Listener<JSONArray> listener = new Response.Listener<JSONArray>()
        {

            @Override
            public void onResponse(JSONArray response) {
                // TODO Auto-generated method stub

            }

        };
        Response.ErrorListener errorListener = new Response.ErrorListener()
        {

            @Override
            public void onErrorResponse(VolleyError error) {
                // TODO Auto-generated method stub

            }

        };

并使用

    JsonArrayRequest  jr =new JsonArrayRequest(Request.Method.GET,url, listener, errorListener) ;

编辑2:

我查看来源,看起来如下

 public JsonArrayRequest(String url, Listener<JSONArray> listener, ErrorListener errorListener) {
            super(Method.GET, url, null, listener, errorListener);

        }