ResultsAdapter.java

package com.example.android.booklisting;

import android.app.Activity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

import java.util.List;

/**
 * Created by Rushi Patel on 7/29/2016.
 */
public class ResultsAdapter extends ArrayAdapter<Result> {

    public static final String LOG_TAG = ResultsAdapter.class.getSimpleName();

    private static class ViewHolder {
        TextView resultTitle;
        TextView resultAuthor;
    }


    public ResultsAdapter(Activity context) {
        super(context, 0);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // Get the data item for this position
        Result currentResult = getItem(position);
        //ViewHolder is more efficient because it spends less time finding views
        ViewHolder holder;
        if (convertView == null) {
            // If there's no view to re-use, inflate a brand new view for row
            holder = new ViewHolder();
            LayoutInflater inflater = LayoutInflater.from(getContext());
            convertView = inflater.inflate(R.layout.list_item, parent, false);
            holder.resultTitle = (TextView) convertView.findViewById(R.id.book_title);
            holder.resultAuthor = (TextView) convertView.findViewById(R.id.author);
            // Cache the viewHolder object inside the fresh view
            convertView.setTag(holder);
        } else {
            // View is being recycled, retrieve the viewHolder object from tag
            holder = (ViewHolder) convertView.getTag();
        }

        holder.resultTitle.setText(currentResult.getTitle());

        holder.resultAuthor.setText(currentResult.getBookAuthor());

        return convertView;
    }
}