Android : Individual background image for a listview generated using JSON on Android

Upon conducting extensive research, I am still troubled in solving this dilemma. In brief, I am trying to have a background image for each listview array of items generated from the JSON data. I have already set the url for the background image in JSON. The JSON function has already been configured, and hence I am already able to populate data into the application from an online source. However, its just the background image I can't pull of. I managed to insert an image, but cant figure out how to set a different background image for each listview section.

I also tried playing around with the XML file, but that has not helped much.

Below is the code for my MainActivity

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

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

import android.app.Activity;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.widget.ListView;
import android.widget.Toast;

public class MainActivity extends Activity {
    // Declare Variables
    JSONObject jsonobject;
    JSONArray jsonarray;
    ListView listview;
    ListViewAdapter adapter;
    ProgressDialog mProgressDialog;
    ArrayList<HashMap<String, String>> arraylist;
    static String LIST_ITEM_NAME = "list_item_name";
    static String COUNTRY = "country";
    static String LIST_ITEM_PRICE = "list_item_price";
    static String LIST_ITEM_BAC = "list_item_bac";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Get the view from listview_main.xml
        setContentView(R.layout.listview_main);
        // Execute DownloadJSON AsyncTask
        new DownloadJSON().execute();
    }

    // DownloadJSON AsyncTask
    private class DownloadJSON extends AsyncTask<Void, Void, Void> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            Toast.makeText(MainActivity.this, "Loading.. Please Wait", 5000).show();
        }

        @Override
        protected Void doInBackground(Void... params) {
            // Create an array
            arraylist = new ArrayList<HashMap<String, String>>();
            // Retrieve JSON Objects from the given URL address
            jsonobject = JSONfunctions
                    .getJSONfromURL("http://dooba.ca/analytics/ed.php");

            try {
                // Locate the array name in JSON
                jsonarray = jsonobject.getJSONArray("list_item");

                for (int i = 0; i < jsonarray.length(); i++) {
                    HashMap<String, String> retrieve = new HashMap<String, String>();
                    jsonobject = jsonarray.getJSONObject(i);
                    // Retrive JSON Objects
                    retrieve.put("list_item_bac", jsonobject.getString("list_item_bac"));
                    retrieve.put("list_item_name", jsonobject.getString("list_item_name"));
                    retrieve.put("country", jsonobject.getString("country"));
                    retrieve.put("list_item_price", jsonobject.getString("list_item_price"));

                    // Set the JSON Objects into the array
                    arraylist.add(retrieve);



                }
            } catch (JSONException e) {
                Log.e("Error", e.getMessage());
                e.printStackTrace();
            }
            return null;
        }

        @Override
        protected void onPostExecute(Void args) {
            // Locate the listview in listview_main.xml
            listview = (ListView) findViewById(R.id.listview);
            // Pass the results into ListViewAdapter.java
            adapter = new ListViewAdapter(MainActivity.this, arraylist);
            // Set the adapter to the ListView
            listview.setAdapter(adapter);

        }
    }
}

MainActivity also makes reference to my ListViewAdapter class, and hence,

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

import android.content.Context;
import android.content.Intent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class ListViewAdapter extends BaseAdapter {

    // Declare Variables
    Context context;
    LayoutInflater inflater;
    ArrayList<HashMap<String, String>> data;
    ImageLoader imageLoader;
    HashMap<String, String> resultp = new HashMap<String, String>();

    public ListViewAdapter(Context context,
            ArrayList<HashMap<String, String>> arraylist) {
        this.context = context;
        data = arraylist;
        imageLoader = new ImageLoader(context);
    }

    @Override
    public int getCount() {
        return data.size();
    }

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    public View getView(final int position, View convertView, ViewGroup parent) {
        // Declare Variables
        TextView list_item_name;
        TextView country;
        TextView list_item_price;
        ImageView list_item_bac;

        inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        View itemView = inflater.inflate(R.layout.listview_item, parent, false);
        // Get the position
        resultp = data.get(position);

        // Locate the TextViews in listview_item.xml
        list_item_name = (TextView) itemView.findViewById(R.id.list_item_name);
        country = (TextView) itemView.findViewById(R.id.country);
        list_item_price = (TextView) itemView.findViewById(R.id.list_item_price);

        // Locate the ImageView in listview_item.xml
        list_item_bac = (ImageView) itemView.findViewById(R.id.list_item_bac);

        // Capture position and set results to the TextViews
        list_item_name.setText(resultp.get(MainActivity.LIST_ITEM_NAME));
        country.setText(resultp.get(MainActivity.COUNTRY));
        list_item_price.setText(resultp.get(MainActivity.LIST_ITEM_PRICE));
        // Capture position and set results to the ImageView
        // Passes flag images URL into ImageLoader.class
        imageLoader.DisplayImage(resultp.get(MainActivity.LIST_ITEM_BAC), list_item_bac);
        // Capture ListView item click
        itemView.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // Get the position
                resultp = data.get(position);
                Intent intent = new Intent(context, SingleItemView.class);

                intent.putExtra("list_item_name", resultp.get(MainActivity.LIST_ITEM_NAME));

                intent.putExtra("country", resultp.get(MainActivity.COUNTRY));

                intent.putExtra("list_item_price",resultp.get(MainActivity.LIST_ITEM_PRICE));

                intent.putExtra("list_item_bac", resultp.get(MainActivity.LIST_ITEM_BAC));
                // Start SingleItemView Class
                context.startActivity(intent);

            }
        });
        return itemView;
    }
}

Below is the XML file for listview_item and listview_main

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" 
    android:paddingLeft="20dp"
    android:paddingRight="20dp"
    android:paddingTop="7dp"
    android:paddingBottom="7dp"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/ranklabel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/ranklabel" 
        android:textColor="#F0F0F0"/>

    <TextView
        android:id="@+id/list_item_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@+id/ranklabel" 
        android:textColor="#F0F0F0"/>

    <TextView
        android:id="@+id/countrylabel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/ranklabel"
        android:text="@string/countrylabel" 
        android:textColor="#F0F0F0"/>

    <TextView
        android:id="@+id/country"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/list_item_name"
        android:layout_toRightOf="@+id/countrylabel" 
        android:textColor="#F0F0F0"/>

    <TextView
        android:id="@+id/populationlabel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/countrylabel"
        android:text="@string/populationlabel" 
        android:textColor="#F0F0F0"/>

    <TextView
        android:id="@+id/list_item_price"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/country"
        android:layout_toRightOf="@+id/populationlabel" 
        android:shadowColor="#000000"
        android:shadowDx="-2"
        android:shadowDy="2"
        android:shadowRadius="0.01"
        android:textColor="#f2f2f2"/>

    <ImageView
        android:id="@+id/list_item_bac"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="0dp"
        android:background="#000000"
        android:alpha="0.8" />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" 
    android:background="@drawable/graybac">

    <ListView
        android:id="@+id/listview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" 
        android:divider="@drawable/divider"
        android:dividerPadding="12dip"
        android:showDividers="middle"
        />

</RelativeLayout>

Any help or guidance would be much appreciated.

If you need clarification, let me know. Thanks in advance