How to filter a RecyclerView with a SearchView

Question

I am trying to implement the SearchView from the support library. I want the user to be to use the SearchView to filter a List of movi

Answer 1

Following @Shruthi Kamoji in a cleaner way, we can just use a filterable, its meant for that:

public abstract class GenericRecycleAdapter extends RecyclerView.Adapter implements Filterable
{
    protected List list;
    protected List originalList;
    protected Context context;

    public GenericRecycleAdapter(Context context,
    List list)
    {
        this.originalList = list;
        this.list = list;
        this.context = context;
    }

    ...

    @Override
    public Filter getFilter() {
        return new Filter() {
            @SuppressWarnings("unchecked")
            @Override
            protected void publishResults(CharSequence constraint, FilterResults results) {
                list = (List) results.values;
                notifyDataSetChanged();
            }

            @Override
            protected FilterResults performFiltering(CharSequence constraint) {
                List filteredResults = null;
                if (constraint.length() == 0) {
                    filteredResults = originalList;
                } else {
                    filteredResults = getFilteredResults(constraint.toString().toLowerCase());
                }

                FilterResults results = new FilterResults();
                results.values = filteredResults;

                return results;
            }
        };
    }

    protected List getFilteredResults(String constraint) {
        List results = new ArrayList<>();

        for (E item : originalList) {
            if (item.getName().toLowerCase().contains(constraint)) {
                results.add(item);
            }
        }
        return results;
    }
} 

The E here is a Generic Type, you can extend it using your class:

public class customerAdapter extends GenericRecycleAdapter

Or just change the E to the type you want ( for example)

Then from searchView (the widget you can put on menu.xml):

searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
    @Override
    public boolean onQueryTextSubmit(String text) {
        return false;
    }

    @Override
    public boolean onQueryTextChange(String text) {
        yourAdapter.getFilter().filter(text);
        return true;
    }
});