Add search for listview

addTextChangedListener.java

searchEditText.addTextChangedListener(new TextWatcher() {
    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
    }

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
        filmsAdapter.getFilter().filter(s);
    }

    @Override
    public void afterTextChanged(Editable s) {
    }
});

FilmsAdapter.java

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Filter;
import android.widget.TextView;

import com.example.lenovo.webfliks.R;
import com.example.lenovo.webfliks.parser.FilmsItem;

import java.util.ArrayList;

public class FilmsAdapter extends ArrayAdapter<FilmsItem> {

    private Context context;
    private ArrayList<FilmsItem> filmsItems;

    public FilmsAdapter(Context context, int resource, ArrayList<FilmsItem> objects) {
        super(context, resource, objects);

        this.context = context;
        filmsItems = new ArrayList<>(objects.size());
        filmsItems.addAll(objects);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        FilmsItem filmsItem = getItem(position);

        if (convertView == null) {
            convertView = LayoutInflater.from(context).inflate(R.layout.video_item_layout, parent, false);
        }

        TextView filmNameTextView = (TextView) convertView.findViewById(R.id.film_name);
        filmNameTextView.setText(filmsItem.getFilmName());

        return convertView;
    }

    @Override
    public Filter getFilter() {
        return nameFilter;
    }

    Filter nameFilter = new Filter() {
        @Override
        public CharSequence convertResultToString(Object resultValue) {
            return ((FilmsItem) resultValue).getFilmName();
        }

        @Override
        protected FilterResults performFiltering(CharSequence constraint) {

            FilterResults results = new FilterResults();

            if (constraint != null) {
                ArrayList<FilmsItem> suggestions = new ArrayList<>();
                for (FilmsItem filmsItem : filmsItems) {
                    if (filmsItem.getFilmName().toLowerCase().contains(constraint.toString().toLowerCase())) {
                        suggestions.add(filmsItem);
                    }
                }
                results.values = suggestions;
                results.count = suggestions.size();
            }

            return results;
        }

        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {
            clear();
            if (results != null && results.count > 0) {
                addAll((ArrayList<FilmsItem>) results.values);
            } else {
                addAll(filmsItems);
            }
            notifyDataSetChanged();
        }
    };
}