android - ListView items are overlapped -

items listview overlapped after delete items. why? example before , after delete first item:

i deleting elements using method:

public void updatedata(list<parseobject> data) {     mgrouplist.clear();     mgrouplist.addall(data);     notifydatasetchanged(); } 

listview:

<listview     android:id="@android:id/list"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:divider="@null"/> 

getview in adapter:

@override public view getview(int position, view convertview, viewgroup parent) {     viewholder viewholder;      if (convertview == null) {         viewholder = new viewholder();         convertview = mlayoutinflater.inflate(r.layout.card_item, parent, false);         viewholder.mcardviewnative = (cardviewnative) convertview.findviewbyid(r.id.card_view);         convertview.settag(viewholder);     } else {         viewholder = (viewholder) convertview.gettag();     }       //code      viewholder.mcardviewnative.setcard(card);      return convertview; } 

card_item.xml:

<it.gmariotti.cardslib.library.view.cardviewnative android:background="@drawable/header_dark" android:id="@+id/card_view" xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content"/> 

update

if don't use viewholder , inflate view everytime, there no overlap. inflate view everytime not good.

@override public view getview(int position, view convertview, viewgroup parent) {      convertview = mlayoutinflater.inflate(r.layout.card_item, parent, false);     cardviewnative cardviewnative = (cardviewnative) convertview.findviewbyid(r.id.card_view);      //code      cardviewnative.setcard(card);      return convertview; } 

try

convertview = mlayoutinflater.inflate(r.layout.card_item, null); 

instead of

convertview = mlayoutinflater.inflate(r.layout.card_item, parent, false); 

it works me, using viewholder static class