我可以删除listView数组但不能更新listview吗？

Question

I spent some time to google it, but didn't help.

I have a listview that contains an ArrayList .

Can I collect all data in array, show it in listView and delete array, but not update listView - so data will be on screen?

Answer 1

Yes until you scroll the list view to next visible item (or call notify item set change), then ListView ask adapter to provide object for example at 5th position and you will get ArrayIndexOutOfBoundsException or NullPointerException . So if you want to avoid that you have to copy your list elements to another ArrayList instance and pass it to your adapter.

Answer 2

arrayListMain.get(position).remove(arrayListChild.get(position));
notifydatasetchange();

arrayListMain is which arraylist your are use at setAdapter and arraylistChild is arrayList in your adapter