在Android中逐步淘汰Json

Question

我曾尝试使用Gson和另一种方法从我的localhost获取Json，但仍然无法完成。我尝试过的方法之一就是下面我从网上看到的代码，它分为两个java，它很好地出来了 ＆＃34;解析数据时出错org.json.JSONException：值[{＆＃34;年龄＆＃34;：18}，{＆＃34;年龄＆＃34;：18}，{＆＃34;年龄＆＃34;：18}]类型org.json.JSONArray无法转换为JSONObject＆＃34;哪个[{＆＃34;年龄＆＃34;：18}，{＆＃34;年龄＆＃34;：18}，{＆＃34;年龄＆＃34;：18}]是我想要输出的测试数据背后的问题是什么？

 package com.pxr.tutorial.json;

 import java.io.BufferedReader;
 import java.io.InputStream;
 java.io.InputStreamReader;
 import java.util.HashMap;

 import org.apache.http.HttpEntity;
 import org.apache.http.HttpResponse;
 import org.apache.http.client.HttpClient;
 import org.apache.http.client.entity.UrlEncodedFormEntity;
 import org.apache.http.client.methods.HttpPost;
 import org.apache.http.impl.client.DefaultHttpClient;
 import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;

 import android.util.Log;

 public class JSONfunctions {

public static JSONObject getJSONfromURL(String url){
    InputStream is = null;
    String result = "";
    JSONObject jArray = null;

    //http post
    try{
            HttpClient httpclient = new DefaultHttpClient();
            HttpPost httppost = new HttpPost(url);
            HttpResponse response = httpclient.execute(httppost);
            HttpEntity entity = response.getEntity();
            is = entity.getContent();

    }catch(Exception e){
            Log.e("log_tag", "Error in http connection "+e.toString());
    }

  //convert response to string
    try{
            BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
            StringBuilder sb = new StringBuilder();
            String line = null;
            while ((line = reader.readLine()) != null) {
                    sb.append(line + "\n");
            }
            is.close();
            result=sb.toString();
    }catch(Exception e){
            Log.e("log_tag", "Error converting result "+e.toString());
    }

    try{

        jArray = new JSONObject(result);            
    }catch(JSONException e){
            Log.e("log_tag", "Error parsing data "+e.toString());
    }

    return jArray;
}
 }


 package com.pxr.tutorial.json;

 import java.util.ArrayList;
 import java.util.HashMap;

 import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
 import org.w3c.dom.NodeList;

 import com.pxr.tutorial.xmltest.R;

 import android.app.ListActivity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.View;
 import android.widget.AdapterView;
 import android.widget.AdapterView.OnItemClickListener;
 import android.widget.ListAdapter;
 import android.widget.ListView;
 import android.widget.SimpleAdapter;
 import android.widget.Toast;

 public class Main extends ListActivity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.listplaceholder);

    ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>();


    JSONObject json = JSONfunctions.getJSONfromURL("http://10.0.2.2:28750/User/JsonIndex");

    try{

        JSONArray  earthquakes = json.getJSONArray("Age");

        for(int i=0;i<age.length();i++){                        
            HashMap<String, String> map = new HashMap<String, String>();    
            JSONObject e = earthquakes.getJSONObject(i);

            map.put("id",  String.valueOf(i));
            map.put("name", "Earthquake name:" + e.getString("eqid"));
            map.put("magnitude", "Magnitude: " +  e.getString("magnitude"));
            mylist.add(map);            
        }       
    }catch(JSONException e)        {
         Log.e("log_tag", "Error parsing data "+e.toString());
    }

    ListAdapter adapter = new SimpleAdapter(this, mylist , R.layout.main, 
                    new String[] { "name", "magnitude" }, 
                    new int[] { R.id.item_title, R.id.item_subtitle });

    setListAdapter(adapter);

    final ListView lv = getListView();
    lv.setTextFilterEnabled(true);  
    lv.setOnItemClickListener(new OnItemClickListener() {
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {              
            @SuppressWarnings("unchecked")
            HashMap<String, String> o = (HashMap<String, String>) lv.getItemAtPosition(position);                   
            Toast.makeText(Main.this, "ID '" + o.get("id") + "' was clicked.", Toast.LENGTH_SHORT).show(); 

        }
    });
}
 }`