android - Why my gridview is so unsmooth? -


i use asynctask in mainactivity read data db, , use static sparsearray save data, in getview immediate use sparsearray. still not smooth. asynctask

@override  protected void doinbackground(integer... position) {      (int = 0; < position[0]; i++) {         int dayofweek = % 8 - 1;         int onclass = / 8 + 1;         item item = new item();          if (i % 8 != 0 && timeutil.judgetime(context, dayofweek, onclass)) {             item.setcolor(1);         }          if (i % 8 != 0 && timeutil.hasschool(context, dayofweek, onclass)) {             curriculum curriculum = curriculum.getcurriculum(context, dayofweek, onclass);             courseid = curriculum.getcourseid();             buildid = curriculum.getbuildingid();             roomnum = curriculum.getroomnum();              string nickname = getcourseinfo(context, courseid);             string buildname = getbuildinfo(context, buildid);              item.setnickname(nickname);             item.setplace(buildname);             item.setroomnum(roomnum);              item.sethascourse(1);         }          itemcache.append(i, item);     }     return null; }

and getview

@override     public view getview(int position, view convertview, viewgroup parent) {          convertview = layoutinflater.from(context).inflate(r.layout.gridview_item, null);          coursetext = (textview) convertview.findviewbyid(r.id.grid_item_nick);         placetext = (textview) convertview.findviewbyid(r.id.grid_item_palce);         roomtext = (textview) convertview.findviewbyid(r.id.grid_item_room);             if (position % 8 == 0) {             convertview.setbackgroundcolor(getresources().getcolor(r.color.gray));             coursetext.settext("第" + onclass + "节");             return convertview;         }           itemloadasynctask.item item = itemloadasynctask.itemcache.get(position);         if (item != null && item.getcolor() == 1) {             convertview.setbackgroundcolor(color.white);         }         if (item.gethascourse() == 1) {             setinfoview(item);         }         return convertview;      }


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