PlacesAutoCompleteAdapter.java

/*
 * Copyright (C) 2015 Federico Iosue (federico.iosue@gmail.com)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package it.feio.android.omninotes.models.adapters;

import android.content.Context;
import android.widget.ArrayAdapter;
import android.widget.Filter;
import android.widget.Filterable;
import it.feio.android.omninotes.utils.GeocodeHelper;

import java.util.List;


public class PlacesAutoCompleteAdapter extends ArrayAdapter<String> implements Filterable {

	private static final int MIN_CHARS = 7;

	private List<String> resultList;


	public PlacesAutoCompleteAdapter(Context context, int textViewResourceId) {
		super(context, textViewResourceId);
	}


	@Override
	public int getCount() {
		return resultList.size();
	}


	@Override
	public String getItem(int index) {
		return resultList.get(index);
	}


	@Override
	public Filter getFilter() {
		return new Filter() {
			@Override
			protected FilterResults performFiltering(CharSequence constraint) {
				FilterResults filterResults = new FilterResults();
				if (constraint != null && constraint.length() > MIN_CHARS) {
					// Retrieve the autocomplete results.
					resultList = GeocodeHelper.autocomplete(constraint.toString());
					// Assign the data to the FilterResults
					filterResults.values = resultList;
					filterResults.count = resultList.size();
				}
				return filterResults;
			}


			@Override
			protected void publishResults(CharSequence constraint, FilterResults results) {
				if (results != null && results.count > 0) {
					notifyDataSetChanged();
				} else {
					notifyDataSetInvalidated();
				}
			}
		};
	}
}