ArrayList points to zero size.

ArrayList<UserDetails> Users; ArrayList<UserDetails> backUp; Context context; LayoutInflater lInflater; private List<UserDetails> filteredModelItemsArray; private ModelFilter filter; ListViewAdapter(ArrayList<UserDetails> Users, Context context) { this.Users = Users; this.backUp = new ArrayList<>(Users); Log.d("myLog ", getCount() + " " + backUp.size()); this.context = context; lInflater = (LayoutInflater) context .getSystemService(Context.LAYOUT_INFLATER_SERVICE); } 

There are two arrays, the first Users is an array that is subsequently recruited and, under certain conditions, it will be necessary to restore the backUp array, but the problem is that the backUp array cannot be filled, when initialized, the log writes that both the array and the one have zero size, but in getView the Users array works, i.e. size is not equal to zero.

  @Override public View getView(int i, View view, ViewGroup parent) { View viewItem = view; if (view == null) { view = lInflater.inflate(R.layout.list_view_item, parent, false); } UserDetails user = Users.get(i); ((TextView) view.findViewById(R.id.textView)).setText(user.Username); if (user.Online) { ((TextView) view.findViewById(R.id.textView2)).setText("Онлайн"); } else { ((TextView) view.findViewById(R.id.textView2)).setText("Оффлайн"); } return view; }