android listview: adapter.add(item) ? or adapter.notifyDataSetChanged()

Question

when I use listview, I extends ArrayAdapter and I store the data(one list) in ArrayAdapter, so when data changed,I call:

adapter.add(item).;

And there is another choice ,store the data in my List and when data changed, called in MyAdapter.java :

 listView.setAdapter(adapter);
 adapter.notifyDataSetChanged();

which is the best choice?

Answer 1

off course adapter.add(item); and after that call notifyDataSetChanged() is the better way rather than initialize new adapter and set it again. but it will only works when we are working with a same list and adding or removing some elements. when we are changing the whole list it will not work at that time we should use list.addall(nList).