Android 错误使用 volley jar 创建自定义 ListView

Question

我正在使用 volley jar 创建 customListView 下面是我用来实现的代码。我从 open 那里得到了这个。

public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_inventory, container, false);

            button=(Button)rootView.findViewById(R.id.button);
            button.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    displayView(7);
                    //launchQRScanner(view);
                }
            });

            listView = (ListView) rootView.findViewById(R.id.list);
            adapter = new CustomListAdapter(getActivity(), inventoryList);
            listView.setAdapter(adapter);
            pDialog = new ProgressDialog(getActivity());
            // Showing progress dialog before making http request
            pDialog.setMessage("Loading...");
            pDialog.show();

            Log.d("Url: ",url);

            // Creating volley request obj
            JsonArrayRequest inventoryReq = new JsonArrayRequest(url,new Response.Listener<JSONArray>() {
                        @Override
                        public void onResponse(JSONArray response) {

                            Log.d(TAG, response.toString());
                            hidePDialog();
                            try {
                            JSONObject obj1 = response.getJSONObject(1);
                            int status = obj1.getInt("status");
                            if(status==1) {

                                JSONArray data=obj1.getJSONArray("data");
                                // Parsing json
                                for (int i = 0; i < data.length(); i++) {

                                    JSONObject obj = data.getJSONObject(i);
                                    Inventory inventory = new Inventory();
                                    inventory.setNickName(obj.getString("nickname"));
                                    inventory.setThumbUrl(obj.getString("thumb"));
                                    inventory.setStockNumber(obj.getString("apron_id"));
                                    inventory.setDOP(obj.getString("Date_purchase"));
                                    inventory.setColor(obj.getString("color"));

                                    // adding movie to movies array
                                    inventoryList.add(inventory);


                                }
                            }
                            } catch (JSONException e) {
                                e.printStackTrace();
                                Log.d("JSON","JSON ERROR"+e.getMessage());
                            }

                            // notifying list adapter about data changes
                            // so that it renders the list view with updated data
                            adapter.notifyDataSetChanged();
                        }
                        }, new Response.ErrorListener() {

                                @Override
                                public void onErrorResponse(VolleyError error) {
                                    VolleyLog.d(TAG, "Error: " + error.getMessage());
                                    Log.d("JSON ERROR",error.getMessage());
                                    hidePDialog();

                                }
                          });

            // Adding request to request queue
            AppController.getInstance().addToRequestQueue(inventoryReq);

            return rootView;

        }

逻辑猫

04-28 11:31:10.819  18300-18498/info.androidhive.slidingmenu D/dalvikvm﹕ GC_FOR_ALLOC freed 413K, 13% free 8257K/9479K, paused 19ms, total 20ms
04-28 11:31:10.827  18300-18300/info.androidhive.slidingmenu D/Volley﹕ [1] 3.onErrorResponse: MainActivity
04-28 11:31:10.827  18300-18300/info.androidhive.slidingmenu D/JSON ERROR﹕ org.json.JSONException: Value {"data":[{"apron_id":"123456","created_user":"2","Expiration":"2015-04-23","location":"13","nickname":"uyi","UID_no":"ikujki","Date_purchase":"2015-04-10","Batch":"ikk","update_time":"2015-04-10 05:22:38","color":"juki","manufacture":"0","garment_type":"yuyh","QTY":"898","core_material":"ytyt","created_time":"2015-04-10 05:22:38","apron_status":"0","inventory_id":"33","thumb":"http:\/\/demo.com\/test\/facility\/images\/no_photo.jpg","serial":"iui","apron_retire":"0"},{"apron_id":"12345mn","created_user":"2","Expiration":"2015-03-17","location":"12","nickname":"gfhgh","UID_no":"rtryttttttttt","Date_purchase":"2015-04-28","Batch":"rtrrtyy","update_time":"2015-04-10 05:15:54","color":"ytgtfghtg","manufacture":"0","garment_type":"hgjyhj","QTY":"7688","core_material":"fhgfhy","created_time":"2015-04-10 05:15:54","apron_status":"0","inventory_id":"32","thumb":"http:\/\/demo.com\/test\/facility\/images\/no_photo.jpg","serial":"hfh","apron_retire":"0"},{"apron_id":"12345df","created_user":"2","Expiration":"2015-05-15","location":"12","nickname":"rytyutu","UID_no":"rr546","Date_purchase":"2015-02-11","Batch":"rgf5676","update_time":"2015-04-10 04:50:45","color":"grey23","manufacture":"0","garment_type":"smooth","QTY":"45","core_material":"core2","created_time":"2015-04-10 04:50:45","apron_status":"0","inventory_id":"28","thumb":"http:\/\/demo.com\/test\/facility\/images\/no_photo.jpg","serial":"fgtg6","apron_retire":"0"},{"apron_id":"12345gh","created_user":"2","Expiration":"2015-03-12","location":"6","nickname":"hjytreeeeet","UID_no":"4566","Date_purchase":"2015-04-28","Batch":"gf545646","update_time":"2015-04-10 04:52:28","color":"green1","manufacture":"0","garment_type":"rtr","QTY":"57","core_material":"core3","created_time":"2015-04-10 04:52:28","apron_status":"0","inventory_id":"29","thumb":"http:\/\/demo.com\/test\/facility\/images\/no_photo.jpg","serial":"tyy567","apron_retire":"0"},{"apron_id":"12345jk","created_user":"2","Expiration":"2015-05-07","location":"5","nickname":"hhhhiiiii","UID_no":"gf465","Date_purchase":"2015-04-30","Batch":"tg4657","update_time":"2015-04-10 04:53:35","color":"yello7","manufacture":"0","garment_type":"thick","QTY":"89","core_material":"core4","created_time":"2015-04-10 04:53:35","apron_status":"0","inventory_id":"30","thumb":"http:\/\/demo.com\/test\/facility\/images\/no_photo.jpg","serial":"5rtgr","apron_retire":"0"},{"apron_id":"12345kl","created_user":"2","Expiration":"2015-08-14","location":"5","nickname":"hhjhj","UID_no":"rrrrrrr","Date_purchase":"2015-04-17","Batch":"hghh","update_time":"2015-04-10 05:14:57","color":"ytytyt","manufacture":"0","garment_type":"jyjjyj","QTY":"65765","core_material":"fghf","created_time":"2015-04-10 05:14:57","apron_status":"0","inventory_id":"31","thumb":"http:\/\/demo.com\/test\/facility\/images\/no_photo.jpg","serial":"fh","apron_retire":"0"},{"apron_id":"67675687866","created_user":"2","Expiration":"2018-05-08","location":"13","nickname":"tyujyhj","UID_no":"yujyhjy","Date_purchase":"2015-05-08","Batch":"ytyty","update_time":"2015-04-23 07:15:06","color":"hhjyj","manufacture":"14","garment_type":"yujyhjyu","QTY":"2147483647","core_material":"hhjh","created_time":"2015-04-10 05:27:02","apron_status":"0","inventory_id":"37","thumb":"http:\/\/demo.com\/test\/facility\/images\/no_photo.jpg","serial":"t yt","apron_retire":"0"},{"apron_id":"12345as","created_user":"2","Expiration":"2015-06-30","location":"13","nickname":"nick","UID_no":"3546re","Date_purchase":"2015-04-01","Batch":"3454fgf","update_time":"2015-04-10 04:49:10","color":"black","manufacture":"0","garment_type":"pure1","QTY":"42","core_material":"core1","created_time":"2015-04-10 04:49:10","apron_status":"0","inventory_id":"27","thumb":"http:\/\/demo.com\/test\/facility\/images\/no_photo.jpg","serial":"2323","apron_retire":"0"},{"apron_id":"89745465798416467987","created_user":"2","Expiration":"1969-12-31","location":"12","nickname":"test","UID_no":"35678"

由于这个错误没有列表来了

 [1] 3.onErrorResponse: MainActivity

请提出您的意见。提前致谢。

我已将 JSONArrayRequest 更改为 JSONObjectRequest 出现新错误。

Answer 1

错误:

它给出 JSONException 因为您试图将响应解析为 JSONArray，而服务器正在返回打包到 JSONObject 中的响应。

JsonArrayRequest inventoryReq = new JsonArrayRequest(Request.Method.GET, url,(String) null, new Response.Listener<JSONArray>() {
                        @Override
                        public void onResponse(JSONArray response) {
                             ............. 
                             .............
}

解决方案:

在 onResponse() 方法中处理 JSONObject。

JsonObjectRequest inventoryReq = new JsonObjectRequest(Request.Method.GET,
            url, (String) null, new Response.Listener<JSONObject>() {
    @Override
    public void onResponse(JSONObject response) {
        try {
            int status = response.getInt("status");
            if(status == 1){
                JSONArray data = response.getJSONArray("data")
                for(int i=0; i<data.length(); i++){
                    JSONObject obj = data.getJSONObject(i);
                    //Do something
                }

         }catch(...){
         ...
         }
    }
    ........ ........ ........
    ........ ........ ........