android - ListView with Custom Adapter - IndexOutOfBoundsException when list is empty -

i have list in store strings server. have custom adapter listview. each item has textview , switch.

in oncreate method, list empty , after data received server, calling notifydatasetchanged on adapter.

my query specific switch(or checkbox in similar case). please @ code below. best explain using quotes.

public class detaildomactivity extends appcompatactivity {     listview listview;    dealofthemonthadapter mdealofthemonthadapter;    list<string> mtitles = new arraylist<string>();      @override     protected void oncreate(bundle savedinstancestate) {       super.oncreate(savedinstancestate);       setcontentview(r.layout.activity_detail_dom);       ....       ....        // clearing list before getting values server       mtitles.clear();        listview = (listview) findviewbyid(r.id.listview);        // if remove below 2 lines,        // , add them after getting data server,       // works fine.        // query here is, when list empty,       // , when getcount() in adapter returns 0,       // why getview() being called?        // normal behaviour?       mdealofthemonthadapter = new dealofthemonthadapter(this);       listview.setadapter(mdealofthemonthadapter);        // gets values server ,       // stores them in mtitles list.         // @ end notifydatasetchanged()        // called on adapter        getdatafromserver();     }        private class dealofthemonthadapter extends baseadapter {      final context context;      list<boolean> mprogress = new arraylist<boolean>();      public dealofthemonthadapter(context context) {         this.context = context;         mprogress.clear();     }       @override     public int getcount() {         return mtitles.size();     }       @override     public long getitemid(int position) {         return position;     }      @override     public object getitem(int position) {         return position;     }      @override     public view getview(final int position, view convertview, viewgroup parent) {          final viewholder holder;           if (convertview == null) {             convertview = layoutinflater.from(context).inflate(r.layout.item_detail_dom, null);              holder = new viewholder();             holder.mtextview = (textview) convertview.findviewbyid(r.id.textview);             holder.mimageview = (imageview) convertview.findviewbyid(r.id.imageview);             holder.mswitch = (switchcompat) convertview.findviewbyid(r.id.switch_dom);              convertview.settag(holder);         } else {             holder = (viewholder) convertview.gettag();         }          holder.mtextview.settext(mtitles.get(position));         holder.mswitch.setoncheckedchangelistener(new compoundbutton.oncheckedchangelistener() {             @override             public void oncheckedchanged(compoundbutton buttonview, boolean ischecked) {                  if (ischecked)                     mprogress.set(position, true);                 else                     mprogress.set(position, false);             }         });          // indexoutofboundsexception @ below line         holder.mswitch.setchecked(mprogress.get(position));          return convertview;     } }  public static class viewholder {      textview mtextview;     imageview mimageview;     switchcompat mswitch; }  } 

as far knowledge goes, getview() called depending on count returned getcount(). so, when list empty, should return 0 , hence, getview() should not called.

can please explain me behaviour? let me know if need else.

logcat:

java.lang.indexoutofboundsexception: invalid index 0, size 0                                                                          @ java.util.arraylist.throwindexoutofboundsexception(arraylist.java:255)                                                                          @ java.util.arraylist.get(arraylist.java:308)                                                                          @ com.xxx.xx.detaildomactivity$dealofthemonthadapter.getview(detaildomactivity.java:285)                                                                          @ android.widget.abslistview.obtainview(abslistview.java:2346)                                                                          @ android.widget.listview.measureheightofchildren(listview.java:1281) 

the indexoutofboundsexception caused mprogress empty while mtitles not. dealing multiple collections on listview can tricky, since have make sure collections have @ least getcount()'s size. that's of course possible, error prone. can wrap information around model class. e.g.

 public class mymodel {     public string name;     public boolean ischecked  } 

and change list<string> mtitles list<mymodel> mtitles. way can deal 1 collection, , retrieve , change property of the item @ position