Question

I have one android activity which extends ListActivity. Every time list items is pressed the activity should change its state(new list adapter) and reload. To do that on item click I create new ArrayAdapter for the list and set it but instead of resetting the list of items new items are just appended to the older ones. How can I erase old list items and set new ones?

private void update() {
    if (flag == null) {
        //do nothing
    } else {
        list_items = new Vector();
        list_items.addAll(getNewListItems());
    }
    String[] items = new String[list_items.size()];
    for (int i=0; i<list_items.size(); i++) 
        items[i] = list_items.get(i).toString();
    setListAdapter(new ArrayAdapter<String>(this, R.layout.menu_layout, R.id.label, items));
}

Answer 1

Make a custom adapter, then

You can just remove old items add your new items in your String[] items.

And just call notifyDataSetChanged() to your adapter…

Then you don’t have to call every time new adapter..