JSON Parsing in android

Question

У меня есть url, и я разбираю содержимое json, используя класс JsonParser. Я хочу отображать изображения из webservice. Когда я использую объект JSON для синтаксического анализа данных, то я не могу получить значение и ошибка отображения в LogCat (JsonException):

public String PostConnection(String strUrl,ArrayList<NameValuePair> alstNameValuePair) { 
      InputStream mInputStream = null; 
      try { 
       //This is the default apacheconnection. 
       HttpClient mHttpClient = new DefaultHttpClient(); 
    //   HttpConnectionParams.setConnectionTimeout(mHttpClient.getParams(), 60000); //Timeout Limit 
       //Pathe of serverside 
    //   HttpPost mHttpPost = new HttpPost(strUrl); 
       HttpGet mHttpGet = new HttpGet(strUrl); 

    //   if(alstNameValuePair!=null) 
    //   { 
        //post the valur you want to pass. 
    //    mHttpGet.setEntity(new UrlEncodedFormEntity(alstNameValuePair)); 
    //   } 

       //get the valu from the saerverside as response. 
       HttpResponse mHttpResponse = mHttpClient.execute(mHttpGet); 
       HttpEntity mHttpEntity = mHttpResponse.getEntity(); 
       mInputStream = mHttpEntity.getContent(); 

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

      String strLine = null; 
      String strResult = ""; 

      //convert response in to the string. 
      try { 
        if(mInputStream!=null){ 
         BufferedReader mBufferedReader = new BufferedReader(new InputStreamReader(mInputStream,HTTP.UTF_8), 8); 
         StringBuilder mStringBuilder = new StringBuilder(); 
         while((strLine = mBufferedReader.readLine()) != null) { 
         mStringBuilder.append(strLine + "\n"); 
         } 
          strResult = mStringBuilder.toString(); 
          mInputStream.close(); 
        } 
       } 
       catch (Exception e) { 
        e.printStackTrace(); 
       } 

      return strResult; 
     } 

И вот мой MainActivity.java код класса

ArrayList<NameValuePair> mNameValuePair = new ArrayList<NameValuePair>(); 
       mNameValuePair.add(new BasicNameValuePair("id_product", "id_product")); 
       Log.i("NameValuePair","" + mNameValuePair); 
       JSONParser jparser = new JSONParser(); 
       result = jparser.PostConnection(URL1, null); 
       Log.i("result",""+ result); 

       JSONObject json = new JSONObject(); 
       json.put(result, true); 
       Log.i("JSON FROM URL","" + json); 

    //   String jb = json.get("id_product").toString(); 
    //   Log.i("jb string","" + jb); 


       JSONArray jArray = json.names(); 
       Log.i("JSON ARRAY","" + jArray); 

       String jb = jArray.get(0).toString(); 
       Log.i("jb string","" + jb); 
       ArrayList<String> ararylst = new ArrayList<String>(); 
       ararylst.add(result); 
       Log.i("ArrayList for result",""+ ararylst); 


       for(int i=0;i<=jArray.length();i++){ 

        Log.i("Json Length",""+ jArray.length()); 
    //    JSONObject jo = json.getJSONObject("image"); 
    //    Log.i("JSON OBject in for",""+ jo); 
    //    image = jo.getString("image"); 
    //    Log.i("String in for",""+ image); 
    //    json.get("image"); 
        JSONObject tableData = jArray.getJSONObject(i); 
        image = tableData.getString("image"); 
        Log.i("imageinloop",""+ image); 
        arraylist.add(image); 
        Log.i("ArrayList","" +arraylist); 

    //    AddObjectToList(image); 

       } 

      } 
      catch (Exception e) { 
       // TODO: handle exception 
       e.printStackTrace(); 
      } 

Это мой Json

[ 
    { 
     "id_product": "4549", 
     "product_code": "9788184402070", 
     "id_author": "70", 
     "image": "iblazing.net/navbharat/img/p/9/0/9/7/9097-tonytheme_product.jpg" 
    }, 

{ 
     "id_product": "4550", 
     "product_code": "9788184402071", 
     "id_author": "71", 
     "image": "iblazing.net/navbharat/img/p/9/0/9/7/9097-tonytheme_product1.jpg" 
    } 
] 

Вот мой Logcat Ошибка:

11-12 06:04:59.072: W/System.err(2748): org.json.JSONException: Value [{"id_product":"4549","product_code":"9788184402070","id_author":"70","id_editor":"70","id_translator":"70","id_supplier":"0","id_booklang":"1","id_baseunit":"0","id_distributor":"1","id_publisher":"1","id_manufacturer":"0","id_category_default":"2","id_shop_default":"1","id_tax_rules_group":"1","on_sale":"0","online_only":"0","ean13":"","upc":"","ecotax":"0.000000","quantity":"-1","minimal_quantity":"1","price":"135.000000","wholesale_price":"0.000000","unity":"","unit_price_ratio":"0.000000","additional_shipping_cost":"0.00","reference":"","supplier_reference":"","location":"","width":"0.000000","height":"0.000000","depth":"0.000000","weight":"0.000000","out_of_stock":"2","quantity_discount":"0","customizable":"0","uploadable_files":"0","text_fields":"0","active":"1","redirect_type":"404","id_product_redirected":"0","available_for_order":"1","available_date":"0000-00-00","condition":"new","show_price":"1","indexed":"1","visibility":"both","cache_is_pack":"0","cache_has_attachments":"0","is_virtual":"0","cache_default_attribute":"0","no_of_pages":"224","bindingtype":"paper","upcoming":"0","booktype":"ebook","date_add":"2013-10-16 15:23:46","date_upd":"2013-10-25 14:13:54","advanced_stock_management":"0","id_shop":"1","id_product_attribute":null,"description":"<p><strong>Lorem Ipsum<\/strong><span>\u00a0is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.<\/span><\/p>","description_short":"<p><strong>Lorem Ipsum<\/strong>\u00a0is simply dummy text of the printing and typesetting industry.<\/p>","description_guj":"<p>\u0aaa\u0ab0\u0acd\u0ab5\u0aa4\u0aae\u0abe\u0ab3\u0abe\u0aa8\u0ac0 \u0a85\u0a82\u0aa6\u0ab0 \u0aaa\u0acd\u0ab0\u0ab5\u0ac7\u0ab6\u0ac7 \u0a9b\u0ac7 \u0aa4\u0ac7\u0ab5\u0abe\u0a82 \u0aac\u0ab9\u0ac1 \u0aa5\u0acb\u0aa1\u0abe\u0a82 \u0ab8\u0acd\u0aa5\u0ab3\u0acb\u0aae\u0abe\u0a82\u0aa8\u0abe \u0a8f\u0a95 \u0ab5\u0abe\u0a9f\u0ac7 \u0a85\u0aae\u0ac7 \u0aa4\u0abf\u0aac\u0ac7\u0a9f\u0aae\u0abe\u0a82 \u0aa6\u0abe\u0a96\u0ab2 \u0aa5\u0aaf\u0abe \u0ab9\u0aa4\u0abe. \u0a86 \u0ab5\u0a96\u0aa4\u0ac7 \u0a85\u0aae\u0ac7 \u0a86\u0a97\u0ab3 \u0a95\u0ac7\u0a9f\u0ab2\u0ac7 \u0ab8\u0ac1\u0aa7\u0ac0 \u0a9c\u0a88 \u0ab6\u0a95\u0ab6\u0ac1\u0a82 \u0aa4\u0ac7\u0aa8\u0ac0 \u0a9a\u0abf\u0a82\u0aa4\u0abe, \u0a85\u0ab2\u0aac\u0aa4\u0acd\u0aa4, \u0ab9\u0ab5\u0ac7 \u0a85\u0aae\u0aa8\u0ac7 \u0aa5\u0ab5\u0abe \u0ab2\u0abe\u0a97\u0ac0. \u0ab8\u0abe\u0ab0\u0ac7 \u0aa8\u0ab8\u0ac0\u0aac\u0ac7 \u0a85\u0ab9\u0ac0\u0a82 \u0a85\u0aae\u0aa8\u0ac7 \u0a95\u0acb\u0a88 \u0a93\u0ab3\u0a96\u0aa4\u0ac1\u0a82 \u0aa8\u0ab9\u0acb\u0aa4\u0ac1\u0a82, \u0aa8\u0ac7 \u0a95\u0acb\u0a88 \u0a9d\u0ac7\u0ab0\u0ac0\u0ab2\u0abe \u0a85\u0aae\u0ab2\u0aa6\u0abe\u0ab0\u0ac7 \u0ab2\u0acb\u0a95\u0acb\u0aa8\u0ac7 \u0a85\u0aae\u0abe\u0ab0\u0abe\u0aa5\u0ac0 \u0aad\u0aa1\u0a95\u0abe\u0ab5\u0ac7\u0ab2\u0abe \u0aaa\u0aa3 \u0aa8\u0ab9\u0acb\u0aa4\u0abe. \u0a95\u0acb\u0a88 \u0aaa\u0ac2\u0a9b\u0aaa\u0ab0\u0a9b \u0a95\u0ab0\u0aa4\u0ac1\u0a82, \u0aa4\u0acb \u0a85\u0aae\u0ac7 \u0a95\u0ab9\u0ac7\u0aa4\u0abe \u0a95\u0ac7 \u0a95\u0ac8\u0ab2\u0abe\u0ab8\u0aa8\u0ac0 \u0a9c\u0abe\u0aa4\u0acd\u0ab0\u0abe\u0a8f \u0aa8\u0ac0\u0a95\u0ab3\u0acd\u0aaf\u0abe \u0a9b\u0ac0\u0a8f<\/p>","description_short_guj":"<p>\u0aaa\u0ab0\u0acd\u0ab5\u0aa4\u0aae\u0abe\u0ab3\u0abe\u0aa8\u0ac0 \u0a85\u0a82\u0aa6\u0ab0 \u0aaa\u0acd\u0ab0\u0ab5\u0ac7\u0ab6\u0ac7 \u0a9b\u0ac7 \u0aa4\u0ac7\u0ab5\u0abe\u0a82 \u0aac\u0ab9\u0ac1 \u0aa5\u0acb\u0aa1\u0abe\u0a82 \u0ab8\u0acd\u0aa5\u0ab3\u0acb\u0aae\u0abe\u0a82\u0aa8\u0abe \u0a8f\u0a95 \u0ab5\u0abe\u0a9f\u0ac7 \u0a85\ 
11-12 06:04:59.072: W/System.err(2748): at 0 of type java.lang.String cannot be converted to JSONObject 
11-12 06:04:59.081: W/System.err(2748):  at org.json.JSON.typeMismatch(JSON.java:100) 
11-12 06:04:59.081: W/System.err(2748):  at org.json.JSONArray.getJSONObject(JSONArray.java:484) 
11-12 06:04:59.081: W/System.err(2748):  at app.navbharatpublication.tablet.HomePage.onCreate(HomePage.java:549) 
11-12 06:04:59.081: W/System.err(2748):  at android.app.Activity.performCreate(Activity.java:5104) 
11-12 06:04:59.091: W/System.err(2748):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 
11-12 06:04:59.091: W/System.err(2748):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 
11-12 06:04:59.091: W/System.err(2748):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 
11-12 06:04:59.091: W/System.err(2748):  at android.app.ActivityThread.access$600(ActivityThread.java:141) 
11-12 06:04:59.091: W/System.err(2748):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 
11-12 06:04:59.091: W/System.err(2748):  at android.os.Handler.dispatchMessage(Handler.java:99) 
11-12 06:04:59.103: W/System.err(2748):  at android.os.Looper.loop(Looper.java:137) 
11-12 06:04:59.111: W/System.err(2748):  at android.app.ActivityThread.main(ActivityThread.java:5041) 
11-12 06:04:59.111: W/System.err(2748):  at java.lang.reflect.Method.invokeNative(Native Method) 
11-12 06:04:59.111: W/System.err(2748):  at java.lang.reflect.Method.invoke(Method.java:511) 
11-12 06:04:59.111: W/System.err(2748):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
11-12 06:04:59.121: W/System.err(2748):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
11-12 06:04:59.121: W/System.err(2748):  at dalvik.system.NativeStart.main(Native Method) 

Answer 1

Это не правильно:

  JSONObject json = new JSONObject(); 
      json.put(result, true); 
      Log.i("JSON FROM URL","" + json); 

Вместо этого, вы должны сделать что-то вроде:

JSONArray json = new JSONArray(result); 

После этого, вы предшествовать с:

for (int i = 0; i < json.length(); ++i) { 
    JSONObject product = json.getJSONObject(i); 
    String image = product.getString("image"); 
    ... 
} 

Answer 2

Там сервер возвращая

JSONArray []

и вы пытаетесь построить

JSONObject {}

Используйте JSONArray для анализа ответа, а затем вы можете идти дальше, чтобы высматривать другие ошибки :)

Answer 3

Попробуйте, как показано ниже:

Для разбора

JSONArray arr = new JSONArray(result); 

    for(int i = 0; i < arr.length(); i++){ 
      JSONObject c = arr.getJSONObject(i);   
      Log.v("result--", c.getString("image")); 

    }