2017-02-24 20 views
0

我試圖通過php文件從遠程database獲取數據,並將內容輸出到ListView容器中。當使用測試數據(填充字符串的數據和循環一個JSON對象的創建,然後添加每一個對象到JSONArray)一切工作正常。所以我知道,誤差必須在下面的代碼:針對排除php交互的不兼容JSON類型的接收錯誤

Response.Listener<String> responseListener = new Response.Listener<String>() { 
     @Override 
     public void onResponse(String response) { 
      try { 
       JSONObject jsonResponse = new JSONObject(response); 
       String name = jsonResponse.getString("name"); 
       String genreAddress = jsonResponse.getString("genreAddress"); 
       String blurb = jsonResponse.getString("blurb"); 

        try { 

         JSONObject newListEntity = new JSONObject(); 
         newListEntity.put("name", name); 
         newListEntity.put("genreAddress", genreAddress); 
         newListEntity.put("blurb", blurb); 

        jsonArray.put(newListEntity); 
        } catch (JSONException e) { 
         e.printStackTrace(); 
        } 

       ArrayList<GetDiscoverContent> getPanelContent = GetDiscoverContent.fromJSON(jsonArray); 
       DiscoverAdapter adapter = new DiscoverAdapter(getContext(), getPanelContent); 
       listView.setAdapter(adapter); 
      } catch(JSONException e) { 
       e.printStackTrace(); 
      } 
     } 
    }; 

    DiscoverDbRequest dbReq = new DiscoverDbRequest(tableType, responseListener); 
    RequestQueue queue = Volley.newRequestQueue(getContext()); 
    queue.add(dbReq); 

下面是錯誤的logcat:

02-24 11:44:40.389 20391-20391/com.socialivemusic.socialivemusic 
W/System.err: org.json.JSONException: Value [] of type 
org.json.JSONArray cannot be converted to JSONObject 
    02-24 11:44:40.389 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at org.json.JSON.typeMismatch(JSON.java:111) 
    02-24 11:44:40.389 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at org.json.JSONObject.<init>(JSONObject.java:159) 
    02-24 11:44:40.399 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at org.json.JSONObject.<init>(JSONObject.java:172) 
    02-24 11:44:40.409 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at 
com.socialivemusic.socialivemusic.DiscoverFragment$1.onResponse(DiscoverFragment.java:96) 
    02-24 11:44:40.409 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at 
com.socialivemusic.socialivemusic.DiscoverFragment$1.onResponse(DiscoverFragment.java:92) 
    02-24 11:44:40.409 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at 
com.android.volley.toolbox.StringRequest.deliverResponse(StringRequest.java:60) 
    02-24 11:44:40.419 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at 
com.android.volley.toolbox.StringRequest.deliverResponse(StringRequest.java:30) 
    02-24 11:44:40.429 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at 
com.android.volley.ExecutorDelivery$ResponseDeliveryRunnable.run(ExecutorDelivery.java:99) 
    02-24 11:44:40.429 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at 
android.os.Handler.handleCallback(Handler.java:733) 
    02-24 11:44:40.439 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at 
android.os.Handler.dispatchMessage(Handler.java:95) 
    02-24 11:44:40.439 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at android.os.Looper.loop(Looper.java:136) 
    02-24 11:44:40.439 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at 
android.app.ActivityThread.main(ActivityThread.java:5021) 
    02-24 11:44:40.449 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at java.lang.reflect.Method.invokeNative(Native 
Method) 
    02-24 11:44:40.449 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at java.lang.reflect.Method.invoke(Method.java:515) 
    02-24 11:44:40.459 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at 
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:827) 
    02-24 11:44:40.459 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at 
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:643) 
    02-24 11:44:40.459 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at dalvik.system.NativeStart.main(Native Method) 
    02-24 11:44:41.069 20391-20391/com.socialivemusic.socialivemusic W/System.err: org.json.JSONException: Value [] of type 
org.json.JSONArray cannot be converted to JSONObject 
    02-24 11:44:41.089 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at org.json.JSON.typeMismatch(JSON.java:111) 
    02-24 11:44:41.089 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at org.json.JSONObject.<init>(JSONObject.java:159) 
    02-24 11:44:41.099 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at org.json.JSONObject.<init>(JSONObject.java:172) 
    02-24 11:44:41.099 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at 
com.socialivemusic.socialivemusic.DiscoverFragment$1.onResponse(DiscoverFragment.java:96) 
    02-24 11:44:41.109 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at 
com.socialivemusic.socialivemusic.DiscoverFragment$1.onResponse(DiscoverFragment.java:92) 
    02-24 11:44:41.109 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at 
com.android.volley.toolbox.StringRequest.deliverResponse(StringRequest.java:60) 
    02-24 11:44:41.109 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at 
com.android.volley.toolbox.StringRequest.deliverResponse(StringRequest.java:30) 
    02-24 11:44:41.119 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at 
com.android.volley.ExecutorDelivery$ResponseDeliveryRunnable.run(ExecutorDelivery.java:99) 
    02-24 11:44:41.119 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at 
android.os.Handler.handleCallback(Handler.java:733) 
    02-24 11:44:41.129 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at 
android.os.Handler.dispatchMessage(Handler.java:95) 
    02-24 11:44:41.129 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at android.os.Looper.loop(Looper.java:136) 
    02-24 11:44:41.139 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at 
android.app.ActivityThread.main(ActivityThread.java:5021) 
    02-24 11:44:41.139 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at java.lang.reflect.Method.invokeNative(Native 
Method) 
    02-24 11:44:41.139 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at java.lang.reflect.Method.invoke(Method.java:515) 
    02-24 11:44:41.149 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at 
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:827) 
    02-24 11:44:41.149 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at 
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:643) 
    02-24 11:44:41.159 20391-20391/com.socialivemusic.socialivemusic W/System.err:  at dalvik.system.NativeStart.main(Native Method) 

任何人都瞭解,我發現了錯誤?我在登錄頁面上有非常類似的代碼,對我來說工作得很好。

+0

某處你傳遞一個JSONArray,而不是一個JSONObject – JCoder

+1

你能張貼JSON你得到的樣本?我想你會得到一個空的json數組,但是一個樣本可以幫助更好地查明問題。 –

+0

此方法'GetDiscoverContent.fromJSON(JSONArray),其中'並不實際上要求JSONArray或JSONObject的? – JCoder

回答

0

System.err: at org.json.JSONObject.<init>()

可能發生錯誤的唯一地方。

JSONObject jsonResponse = new JSONObject(response); 

錯誤消息

JSONArray cannot be converted to JSONObject

所以..解析爲JSONArray

JSONArray jsonResponse = new JSONArray(response); 

還是...使用截擊JSONArrayRequest類

建議:使用改進,以適應一次處理您的HTTP請求和JSON轉換