(Android) - ติดปัญหาใน Listview ตำแหน่ง position ไม่ตรง เมื่อ Scroll ..

public View getView(final 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.activity_column, null); 
		
	}
	
	// ColID
	TextView txtID = (TextView) convertView.findViewById(R.id.ColID); 
	txtID.setText(MyArrList.get(position).get("ID") +".");
	
	// ColCode
	TextView txtCode = (TextView) convertView.findViewById(R.id.ColCode);
	txtCode.setText(MyArrList.get(position).get("Code"));
	
	// ColCountry
	TextView txtCountry = (TextView) convertView.findViewById(R.id.ColCountry);
	txtCountry.setText(MyArrList.get(position).get("Country"));
         
	return convertView;
}