为什么出现错误“无法解析列表项”我正在扩展一个超类，但无法访问列表项。为什么我在这里失踪？这是udacity course building miwok应用程序的一部分。在安卓工作室。谢谢

package com.example.android.miwok;

import android.app.Activity;
import android.support.annotation.NonNull;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

import java.util.ArrayList;

/**
 * Created by george on 1/3/17.
 */

public class WordAdapter extends ArrayAdapter<Word> {

    /**
     * This is our own custom constructor (it doesn't mirror a superclass constructor).
     * The context is used to inflate the layout file, and the list is the data we want
     * to populate into the lists.
     *
     * @param context        The current context. Used to inflate the layout file.
     * @param WordAdapter A List of AndroidFlavor objects to display in a list
     */
    public WordAdapter(Activity context, ArrayList<Word> Word) {
        // Here, we initialize the ArrayAdapter's internal storage for the context and the list.
        // the second argument is used when the ArrayAdapter is populating a single TextView.
        // Because this is a custom adapter for two TextViews and an ImageView, the adapter is not
        // going to use this second argument, so it can be any value. Here, we used 0.
        super(context, 0, Word);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // Check if the existing view is being reused, otherwise inflate the view
        View listItemView = convertView;
        if(listItemView == null) {
            listItemView = LayoutInflater.from(getContext()).inflate(R.layout.list_item, parent, false);
        }

        // Get the {@link AndroidFlavor} object located at this position in the list
        Word currentWord = getItem(position);

        // Find the TextView in the list_item.xml layout with the ID version_name
        TextView miwokTextView = (TextView) listItemView.findViewById(R.id.list_items);
        // Get the version name from the current AndroidFlavor object and
        // set this text on the name TextView
        miwokTextView.setText(currentWord.getMiwokTranslation());

        // Find the TextView in the list_item.xml layout with the ID version_number
        TextView defaultTextView = (TextView) listItemView.findViewById(R.id.miwok_text_view);
        // Get the version number from the current AndroidFlavor object and
        // set this text on the number TextView
        defaultTextView.setText(currentWord.getmDefaultTranslation());

        // Return the whole list item layout (containing 2 TextViews and an ImageView)
        // so that it can be shown in the ListView
        return listItemView;
    }
}