How to remove listview all items

Question

In my app, if you click on a button then i want to remove all the listview items. Here, i am using the base adapter for adding the items to the list view.

How can i

Answer 1

I just clean the arraylist , try values.clear();

values = new ArrayList();
values.clear();

ArrayAdapter  adapter;
adapter = new ArrayAdapter(this, R.layout.list,android.R.id.text1, values); 
lista.setAdapter(adapter);