Access JSONRPC - Novice

package com.pjksolutions.jasonrpc;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;

import java.io.InputStreamReader;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class HTTPUtils
{
	String Server;
	String Request;
	URL url;
	HttpURLConnection conn;


	public HTTPUtils()
	{
	}

	public HTTPUtils(String Server)
	{
		this();
		this.Server = Server;
	}


	private void InitServer()
	{
		try
		{
			this.url = new URL(this.Server);
			this.conn = (HttpURLConnection) this.url.openConnection();
			this.conn.setConnectTimeout(10000);
			this.conn.setReadTimeout(10000);
			this.conn.setRequestMethod("POST");

			this.conn.setDoOutput(true);
			this.conn.setDoInput(true);
		}
		catch (Exception ex)
		{
			ex.printStackTrace();
		}
	}


    public String PostRequest(String Request)
    {

        this.Request = Request;

        try 
		{
			this.InitServer();
            DataOutputStream wr = new DataOutputStream(
				this.conn.getOutputStream());
            wr.writeBytes(this.Request);
            wr.flush();
            wr.close();

            InputStream is = conn.getInputStream();
            BufferedReader rd = new BufferedReader(new InputStreamReader(is));
            String line;
            StringBuffer response = new StringBuffer();

            while ((line = rd.readLine()) != null)
			{
                response.append(line);
                response.append('\r');
            }
            rd.close();
            return response.toString();
        }
        catch (Exception e)
		{
			return "error";
		}
    }
}