安卓排气错误，同时获取JSON数据

我在我的本地主机中有一个JSON文件，我试图使用排气请求获取我的android应用程序的所有数据。现在，当我尝试获取我的Parsed数据（使用JSON）时，我收到了一些未知的错误！我正在使用我的模拟器来测试我的应用程序。安卓排气错误，同时获取JSON数据

这里是我的JSON文件：

{"dolaaye_posts":[{"id":"1","post_subject":"salam","post_desc":"salam"},{"id":"2","post_subject":"????","post_desc":"????"}],"success":1}

这里是我的MainActivity.java：

package ir.dolaaye; 

import android.app.ProgressDialog; 
import android.os.Bundle; 
import android.support.design.widget.TabLayout; 
import android.support.v4.app.Fragment; 
import android.support.v4.app.FragmentManager; 
import android.support.v4.app.FragmentPagerAdapter; 
import android.support.v4.view.ViewPager; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.Toolbar; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.view.ViewGroup; 

import com.android.volley.AuthFailureError; 
import com.android.volley.Cache; 
import com.android.volley.NetworkError; 
import com.android.volley.NoConnectionError; 
import com.android.volley.ParseError; 
import com.android.volley.Response; 
import com.android.volley.ServerError; 
import com.android.volley.TimeoutError; 
import com.android.volley.VolleyError; 
import com.android.volley.VolleyLog; 
import com.android.volley.toolbox.JsonArrayRequest; 

import org.json.JSONArray; 
import org.json.JSONException; 
import org.json.JSONObject; 

import java.io.UnsupportedEncodingException; 

public class MainActivity extends AppCompatActivity { 

    /** 
    * The {@link android.support.v4.view.PagerAdapter} that will provide 
    * fragments for each of the sections. We use a 
    * {@link FragmentPagerAdapter} derivative, which will keep every 
    * loaded fragment in memory. If this becomes too memory intensive, it 
    * may be best to switch to a 
    * {@link android.support.v4.app.FragmentStatePagerAdapter}. 
    */ 
    private SectionsPagerAdapter mSectionsPagerAdapter; 

    /** 
    * The {@link ViewPager} that will host the section contents. 
    */ 
    private ViewPager mViewPager; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 


////////start of Volley Request/////////////// 



     String tag_json_array = "tag_json_array"; 
/** 
* @url = Url for get json Object 
*/ 
     String url = "http://10.0.2.2:1378/scripts/dolaaye/posts.json"; 
     /** 
     * Show Progress Dialog 
     *    Before Get Data From Server 
     *    Or 
     *    Get Error From Server 
     */ 
     final ProgressDialog pDialog = new ProgressDialog(this); 
     pDialog.setMessage("در حال جمع آوری اطلاعات..."); 
     pDialog.show(); 

     /** 
     * Create Request For Get Json Array From Server 
     * 
     *   Exist To Method In The Request : 
     *     1 : onResponse => That Get Response For Server 
     *         If Data Exist In The Server 
     * 
     *     2 : onErrorResponse => That Show Error 
     *        If Data Do Not Exist In The Server 
     */ 
     JsonArrayRequest jsonArrReq = new JsonArrayRequest(url, 
       new Response.Listener<JSONArray>() { 
        @Override 
        public void onResponse(JSONArray jsonArray) { 
         Log.e("LOG", jsonArray.toString()); 
         for (int i = 0 ; i < jsonArray.length() ; i++) 
         { 
          try { 
           JSONObject jsonObject = jsonArray.getJSONObject(i); 
           Log.i("LOG", "object : " + jsonObject.getString("id")); 
          } catch (JSONException e) { 
           e.printStackTrace(); 
          } 
         } 
         pDialog.hide(); 
        } 
       }, 
       new Response.ErrorListener() { 
        @Override 
        public void onErrorResponse(VolleyError volleyError) { 
         VolleyLog.e("VolleyError", volleyError.getMessage()); 

         if (volleyError instanceof TimeoutError || volleyError instanceof NoConnectionError) { 
          VolleyLog.e("VolleyError", volleyError.getMessage()); 
         } else if (volleyError instanceof AuthFailureError) { 
          //TODO 
         } else if (volleyError instanceof ServerError) { 
          //TODO 
         } else if (volleyError instanceof NetworkError) { 
          //TODO 
         } else if (volleyError instanceof ParseError) { 
          //TODO 
         } 
         pDialog.hide(); 
        } 
       }); 

     Cache cache = G.getInstance().getRequestQueue().getCache(); 
     Cache.Entry entry = cache.get(url); 
     if (entry != null){ 
      try { 
       String data = new String(entry.data, "UTF-8"); 
       Log.i("LOG",data); 
       pDialog.hide(); 
      } catch (UnsupportedEncodingException e) { 
       e.printStackTrace(); 
      } 
     } else { 
     } 
     G.getInstance().addToRequestQueue(jsonArrReq,tag_json_array); 


     ////end of Volley Request ////////////////////////////////// 

} 
}

我已经将Internet的许可和ACCESS_NETWORK_STATE我的清单。这里是我的logcat：

08-23 13:33:49.767 22388-22388/ir.dolaaye E/Volley: [1] 2.onErrorResponse: VolleyError

我不知道为什么！

来源

2016-08-23 Mohammadreza

你得到的JSONObject响应，并在你的代码中处理JSONArray。 – KishuDroid

在这里检查如何正确地创建一个数组或对象请求 - http://www.androidhive.info/2014/05/android-working-with-volley-library-1/ – Tasos

你得到一个JSONObject在性反应，但你通过使用JsonArrayRequest处理JsonArray在你的代码，所以你必须把JSONObject请求如下

JsonObjectRequest jsObjRequest =新JsonObjectRequest （Request.Method.GET，网址，空，新Response.Listener（）{

@Override 
public void onResponse(JSONObject response) { 
    mTxtDisplay.setText("Response: " + response.toString()); 
}

}，新Response.ErrorListener（）{

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

}

}）;

更多信息按照Android开发者联系

https://developer.android.com/training/volley/request.html

来源

2016-08-23 09:47:59

显然，我的模拟器无法访问json文件那是在本地主机上！我试图使用10.0.2.2，但它不工作！ – Mohammadreza

安卓排气错误，同时获取JSON数据

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