android json application, Data retrive from a url

//JsonActivity.java
package com.v3;
 
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
 
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.CoreProtocolPNames;
import org.json.JSONArray;
import org.json.JSONObject;
import org.json.JSONStringer;
 
import android.app.Activity;
import android.os.Bundle;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
 
public class JsonActivity extends Activity {
	Button button,buttonClear;
	TextView textView;
	String page;
	String str="";
 
	 String url = "http://192.168.1.118/androidjsontest/index.php";
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        button = (Button) findViewById(R.id.btnFetch);
        buttonClear = (Button) findViewById(R.id.btnClear);
        textView = (TextView) findViewById(R.id.txtView);
        button.setOnClickListener(new Button.OnClickListener()
        {
            public void onClick(View v)
            {
                examineJSONFile();
            }
        });
        buttonClear.setOnClickListener(new Button.OnClickListener()
        {
            public void onClick(View v)
            {
            	textView.setText("");
            }
        });
 
    }
 
 
    public String executeHttpGet(String URL) throws Exception 
	{
    	//This method  for HttpConnection  
	    BufferedReader bufferedReader = null;
	    try 
	    {
	        HttpClient client = new DefaultHttpClient();
	        client.getParams().setParameter(CoreProtocolPNames.USER_AGENT, "android");
	        HttpGet request = new HttpGet();
	        request.setHeader("Content-Type", "text/plain; charset=utf-8");
	        request.setURI(new URI(URL));
	        HttpResponse response = client.execute(request);
	        bufferedReader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
 
	        StringBuffer stringBuffer = new StringBuffer("");
	        String line = "";
 
	        String NL = System.getProperty("line.separator");
	        while ((line = bufferedReader.readLine()) != null) 
	        {
	        	stringBuffer.append(line + NL);
	            System.out.print(stringBuffer);
	        }
	        bufferedReader.close();
	        page = stringBuffer.toString();
	        System.out.println(page+"page");
	        return page;
	    } 
	    finally 
	    {
	        if (bufferedReader != null) 
	        {
	            try 
	            {
	            	bufferedReader.close();
	            } 
	            catch (IOException e)    
	            {
	                Log.d("BBB", e.toString());
	            }
	        }
	    }
	}
 
 
    void examineJSONFile()
    {
        try
        {
 
        	String Value="" ;
        	String str = "";
            page = executeHttpGet(url);
            Log.i("hello", str.toString());
 
            JSONObject object=new JSONObject(page);
            str=str+object.names().toString();
 
            String sub1=str.substring(2, str.length()-2);
            String[] names=sub1.split("\",\"");
 
            for (int i=0;i<names.length;i++) {
            	Value=Value+names[i] +":"+object.get(names[i])+"\n";
				System.out.println(names[i]);
 
			}
 
           /* String sub=str.substring(1, str.length()-1);
            String[] names=sub.split(",");
            String[] keyValue=new String[names.length];
            
            for (int i=0;i<names.length;i++) {
            	names[i]=names[i].replace("\"","");
            	Value=Value+names[i] +":"+object.get(names[i])+"\n";
            	//keyValue[i]=names[i] +":"+object.get(names[i])+"\n";
				System.out.println(names[i]);
 
			}*/
 
            textView.setText(Value); 
 
            /*for(int i=0;i<keyValue.length;i++){
            	textView.setText(keyValue[i]);
            }*/
 
        	Log.i("hello", str.toString());
 
        }
        catch (Exception je)
        {
        	textView.setText("Error w/file: " + je.getMessage());
        }
    }
 
}
//main.xml
//==================
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:background="#acd654"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<Button android:text="Fetch_Data"
         android:id="@+id/btnFetch"
         android:layout_width="match_parent" 
         android:layout_height="wrap_content"></Button>
 <Button android:text="Clear_Screen"
         android:id="@+id/btnClear"
         android:layout_width="wrap_content" 
         android:layout_height="wrap_content"></Button>
<TextView android:text="" 
          android:gravity="center"
          android:textColor="#000a44"
          android:id="@+id/txtView" 
          android:layout_width="fill_parent" 
          android:layout_height="fill_parent"/>
</LinearLayout>
//android menifest.xml
//=========================
?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.v3"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="8" />
 
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".JsonActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
 
    </application>
    <uses-permission android:name="android.permission.INTERNET"/>
</manifest>