Map hItems=new LinkedHashMap(); for(Cursor c:cursor){ Course s=new Course(); s.name =c.get("name2"); s.grade=c.get("grade"); int item_id=c.get("id"); //item.id Item item=hItems.get(item_id); if(item==null){ item=new Item(); item.id=item_id; item.name=c.get("name"); item.course=new Course[]{s}; hItems.put(item_id,item); }else{ Course[] cs=new Course[item.course.length+1]; System.arrayCopy(item.course,0,cs,0,cs.length-1); item.course=cs; } } return hItem.values();