Android สอบถามเรื่อง Gridview ครับ อยากรู้วิธีลบ Item ใน Grideview

	public class OpAdapter extends BaseAdapter 
	{
		private Context context;
		private String[][] lis;

		public OpAdapter(Context c, String[][] li) 
		{
			// TODO Auto-generated method stub
			context = c;
			lis = li;
		}

		public int getCount() {
			// TODO Auto-generated method stub
			return lis.length;
		}

		public Object getItem(int position) {
			// TODO Auto-generated method stub
			return position;
		}

		public long getItemId(int position) {
			// TODO Auto-generated method stub
			return position;
		}


		public View getView(int position, View convertView, ViewGroup parent) {
			// TODO Auto-generated method stub
			
			
			LayoutInflater inflater = (LayoutInflater) context
					.getSystemService(Context.LAYOUT_INFLATER_SERVICE);


			if (convertView == null) {
				convertView = inflater.inflate(R.layout.option_xm,null);

			
			}
			final TextView textView = (TextView) convertView.findViewById(R.id.text1);


			textView.setText(lis[position][1].toString());

			return convertView;

		}
	}