Android - Images from Assets folder in a GridView

I have been working on creating a Grid View of images, with images being present in the Assets folder. Opening a File from assets folder in android link helped me with using the bitmap to read it. The code am currently having is:

 public View getView(final int position, View convertView, ViewGroup parent) 
{

  try 
    {
     AssetManager am = mContext.getAssets();
     String list[] = am.list("");
     int count_files = imagelist.length;
     for(int i= 0;i<=count_files; i++)
     {
      BufferedInputStream buf = new BufferedInputStream(am.open(list[i]));
      Bitmap bitmap = BitmapFactory.decodeStream(buf);
      imageView.setImageBitmap(bitmap);
      buf.close();
     }
   }   
   catch (IOException e) 
   {
   e.printStackTrace();
   }
  }

My application does read the image from the Assets folder, but it is not iterating through the cells in the grid view. All the cells of the grid view have a same image picked from the set of images. Can anyone tell me how to iterate through the cells and still have different images ?

I have the above code in an ImageAdapter Class which extends the BaseAdapter class, and in my main class I am linking that with my gridview by:

    GridView  gv =(GridView)findViewById(R.id.gridview);
    gv.setAdapter(new ImageAdapter(this, assetlist));       

Thanks a lot for any help in advance, Saran