/mnt/sdcard/picture 에 저장된 이미지를 리스트뷰로 뿌리려고하는데

import java.io.File;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

public class List_viewActivity extends Activity
{
private String[] mFileStrings;

private File[] listFile;

ListView list;

ImageAdapter adapter;

@Override
public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    File file = new File("<Directory path from sdcard>");

     if (file.isDirectory())
     {
         listFile = file.listFiles();
         mFileStrings = new String[listFile.length];

         for (int i = 0; i < listFile.length; i++)
         {
             mFileStrings[i] = listFile[i].getAbsolutePath();
         }
     }

     list = (ListView) findViewById(R.id.list);
     adapter = new ImageAdapter(this, mFileStrings);
     list.setAdapter(adapter);
}

public class ImageAdapter extends BaseAdapter
{
    private Activity activity;
    private String[] data;
    private LayoutInflater inflater=null;
    public ImageLoader imageLoader;

    public ImageAdapter(Activity a, String[] d)
    {
        activity = a;
        data=d;
        inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        imageLoader=new ImageLoader(activity.getApplicationContext());
    }

    public int getCount() {
        return data.length;
    }

    public Object getItem(int position) {
        return position;
    }

    public long getItemId(int position) {
        return position;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        View vi=convertView;
        if(convertView==null)
            vi = inflater.inflate(R.layout.item, null);

        TextView text=(TextView)vi.findViewById(R.id.text);;
        ImageView image=(ImageView)vi.findViewById(R.id.image);
        text.setText("item "+position);
        imageLoader.DisplayImage(data[position], image);
        return vi;
    }
}
}

이소스를 바탕으로 수정하려고하는데 imageLoader에서 오류가나네요 ㅠㅠ

전체적으로 수정좀 부탁드립니다 ㅠ