android - How do I get my CustomListAdapter to update on notifyDatasetChange? -

this first time building listview custom layout, in case have missed obvious please point out.

the problem having cannot listview update new information after oncreate(); has been used. list static.

i trying create custom listview adapter looks such:

public class mainlistcustombaseadapter extends baseadapter {  static arraylist<listitems> datasomething; static context cont;  public mainlistcustombaseadapter (arraylist<listitems> data, context c){     datasomething = data;     cont = c; }  public int getcount() {     // todo auto-generated method stub     return datasomething.size(); }  public object getitem(int position) {     // todo auto-generated method stub     return datasomething.get(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      view v = convertview;      if (v == null)      {         layoutinflater vi = (layoutinflater)cont.getsystemservice(context.layout_inflater_service);         v = vi.inflate(r.layout.mainlistlayout, null);      }         imageview image = (imageview) v.findviewbyid(r.id.listimage);        textview titleview = (textview)v.findviewbyid(r.id.title);        textview detailitemview = (textview)v.findviewbyid(r.id.detailitem);          listitems msg = datasomething.get(position);        image.setimageresource(msg.icon);        titleview.settext(msg.title);        detailitemview.settext("itemdetails: "+msg.itemdetails);       return v; }  public void updateresults(arraylist<mainlistcustombaseadapter> results){     notifydatasetchanged();   }   } 

my oncreate looks this:

    protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);      recipelist = (listview) findviewbyid(r.id.mainlistview);      shoppingitems = new arraylist<listitems>();     recipelist.setadapter(new mainlistcustombaseadapter(shoppingitems, this));      listitems detail;     detail = new listitems();     detail.seticon(r.drawable.food);     detail.setname("food stuff");     detail.setitemdetails("itemdetailscomp");     shoppingitems.add(detail);  } 

and listitem looks this:

public class listitems {         public int icon ;         public string title;         public string itemdetails;           public string getname() {             return title;         }          public void setname(string from) {             this.title = from;         }          public string getitemdetails() {             return itemdetails;         }          public void setitemdetails(string itemdetailscomp) {             this.itemdetails = itemdetailscomp;         }          public int geticon() {             return icon;         }          public void seticon(int icon) {             this.icon = icon;         }  } 

how listview update dynamically? maybe setinvalidatedviews() or notifydatasetchanged()?

any appreciated.

use below

   mainlistcustombaseadapter adapter = new mainlistcustombaseadapter(shoppingitems, this)    recipelist.setadapter(adapter); 

to refresh or update listview

   adapter.notifydatasetchanged(); 

public void notifydatasetchanged ()

added in api level 1

notifies attached observers underlying data has been changed , view reflecting data set should refresh itself.