Android custom filter/search Gridview -

i'm using custom adapter search in gridview has images , texts. problem if update server new pictures , texts, texts updated. how can update images well?

here custom filter

 class customfilter extends filter {           @override         protected filterresults performfiltering(charsequence constraint) {               filterresults results = new filterresults();              if(constraint != null && constraint.length()>0) {                 // constraint upper                 constraint = constraint.tostring().touppercase();                  arraylist<bookdata> filters = new arraylist<bookdata>();                  //get specific items                  for(int i=0;i<filterlist.size();i++){                      if(filterlist.get(i).getname().touppercase().contains(constraint)){                          bookdata p= new bookdata(filterlist.get(i).getid(),filterlist.get(i).getname(),filterlist.get(i).getpath_1(),filterlist.get(i).getpath_2(),filterlist.get(i).getbooklocalpath(),filterlist.get(i).getimagepath_1(),filterlist.get(i).getimagepath_2(),filterlist.get(i).getimagelocalpath());                         filters.add(p);                     }                 }                 results.count= filters.size();                 results.values=filters;             }else{                 results.values = filterlist;                 results.count = filterlist.size();             }               return results;         }           @override         protected void publishresults(charsequence constraint, filterresults results) {               arraylist = (arraylist<bookdata>) results.values;                   notifydatasetchanged();           }     } 

im using following method in activity class

 gridview = (gridview) findviewbyid(r.id.gridview_a3lam);     sv = (searchview) findviewbyid(r.id.sv);     gridview.setonitemclicklistener(this);     sv.setonquerytextlistener(new searchview.onquerytextlistener() {         @override         public boolean onquerytextsubmit(string query) {             return false;         }         @override         public boolean onquerytextchange(string query) {              adapter.getfilter().filter(query);              return true;         }     });       db = new albumdbhandler(this);  }