Clone new objects to pass to ArrayList?

I'm building an Android app, and I was trying to add objects to an ArrayList. I thought this would create a copy of the object in ArrayList, and then I could reuse the object. I've realized, this isn't the case, and that ArryList was actually referencing the original object.

I'm not really sure how I'd use a loop to create new objects in the onCreate function, so do I somehow need to clone the object and pass it to the ArrayList?

Anyway here's my code:

 public class Main extends Activity {
  private Item myItem = new Item();
  
  btnSave.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            alItems.add(myItem);
            arrayAdapter.notifyDataSetChanged();

You can create a copy constructor in your Item class, and use it to create a copy of your object.

public class Item {
    private int field1;
    public Item() { }

    public Item(Item item) {
       this.field1 = item.field1;
    }
}

And add your object to list using: -

alItems.add(new Item(myItem));