android - ArrayAdapter<String> doesn't support getCheckedItemIds()? -


i hope use lv.getcheckeditemids().length sum of selected items. seems arrayadapter doesn't support getcheckeditemids(), right?

private void initlistview(int pos) {     list<string> msglist = getsms(pos);     arrayadapter<string> adapter2 = new arrayadapter<string>(this,             android.r.layout.simple_list_item_multiple_choice, msglist);     lv.setadapter(adapter2);     lv.setchoicemode(listview.choice_mode_multiple);     lv.setonitemclicklistener(new onitemclicklistener() {         @override         public void onitemclick(adapterview<?> arg0, view arg1, int arg2,                 long arg3) {             setselectedandtotal();         }     }); }  private void setselectedandtotal(){     selectedandtotal.settext(lv.getcheckeditemids().length+ "/"             + lv.getcount());        }       public list<string> getsms(int pos) {         list<string> sms = new arraylist<string>();         uri urismsuri = uri.parse(valuelist.get(pos));         cursor cur = getcontentresolver().query(urismsuri, null, null, null,                 null);          while (cur.movetonext()) {             string address = cur.getstring(cur.getcolumnindex("address"));             string body = cur.getstring(cur.getcolumnindexorthrow("body"));             sms.add("number: " + address + " .message: " + body);          }         return sms;     }

here snippet documentation on using getcheckeditemids():

the result valid if choice mode has not been set choice_mode_none , adapter has stable ids. (hasstableids() == true)

by default, baseadapter (and subclass arrayadapter) not support stable item ids, if want utilize need create own subclass returns true hasstableids() , returns unique value getitemid() each element.

otherwise, you'll have use getcheckeditempositions() instead, in use case described provide same answer need without work.


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