Search through RecyclerView using Searchview

Question

I want to search through RecyclerView, I have List (BaseOfCards is my getter&setter class) My RecyclerViewAdapter<

Answer 1

Using an autocompletetextview or an edittext i handled this one as following where

 public List mItems          

is the initial listitem instance and .

  public static List filteredIt 

is the instance used in displaying items.Since the 1st time the filter results is not null the mItems instance will be equal to the filteredIt instance (thus loosing the initial list) then on the publishResults method right before mItems looses the original values, I'm equating it to the passed instance originallist . Hope it helps someone

private static class ProductsFilter extends Filter {

    private final SalesProductsAdapter adapter;

    private final List originalList;

    private final List filteredList;

    private ProductsFilter(SalesProductsAdapter adapter, List originalList) {
        super();
        this.adapter = adapter;
        this.originalList = new LinkedList<>(originalList);
        this.filteredList = new ArrayList<>();
    }

    @Override
    protected FilterResults performFiltering(CharSequence constraint) {
        filteredList.clear();
        final FilterResults results = new FilterResults();

        if (constraint == null || constraint.length() == 0)
            filteredList.addAll(originalList);
        else {
            final String filterPattern = constraint.toString().toLowerCase().trim();

            for (final SalesProductsItems it : originalList) {

                if (it.getProduct().toLowerCase().contains(filterPattern)) {
                    filteredList.add(it);
                }
            }
        }

        results.values = filteredList;
        results.count = filteredList.size();
        return results;
    }

    @Override
    protected void publishResults(CharSequence constraint, FilterResults results) {
        adapter.mItems = originalList;
        if(results.count > 0) {
            filteredIt.clear();
            filteredIt.addAll((ArrayList) results.values);
            adapter.notifyDataSetChanged();
        } else {
            filteredIt.clear();
            filteredIt.addAll(adapter.mItems);
            adapter.notifyDataSetChanged();
        }
    }
}