WordAdapter.java

package com.simpleapps22.dholuo;

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

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;

import java.util.ArrayList;

import static androidx.core.content.ContextCompat.getColor;

/**
 * {@link WordAdapter} is an {@link ArrayAdapter} that can provide the layout for each list item
 * based on a data source, which is a list of {@link Word} objects.
 */
public class WordAdapter extends ArrayAdapter<Word> {

    private final int mColorResourceId;

    /**
     * Create a new {@link WordAdapter} object.
     *
     * @param context         is the current context (i.e. Activity) that the adapter is being created in.
     * @param words           is the list of {@link Word}s to be displayed.
     * @param colorResourceId is the resource ID for the background color for this list of words
     */
    public WordAdapter(Context context, ArrayList<Word> words, int colorResourceId) {
        super(context, 0, words);
        mColorResourceId = colorResourceId;
    }

    /**
     * @return a list item that displays a word at the given position.
     */
    @NonNull
    @Override
    public View getView(int position, @Nullable View convertView, @NonNull 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 Word} object located at this position in the list
        Word currentWord = getItem(position);

        // Find the TextView in the list_item.xml layout with the ID dholuo_text_view.
        TextView dholuoTextView = listItemView.findViewById(R.id.dholuo_text_view);
        // Get the Dholuo translation from the currentWord object and set this text on
        // the Dholuo TextView.
        dholuoTextView.setText(currentWord.getDholuoTranslation());

        // Find the TextView in the list_item.xml layout with the ID default_text_view.
        TextView defaultTextView = listItemView.findViewById(R.id.default_text_view);
        // Get the default translation from the currentWord object and set this text on
        // the default TextView.
        defaultTextView.setText(currentWord.getDefaultTranslation());

        // Set the theme color for the list item
        View textContainer = listItemView.findViewById(R.id.text_container);
        // Find the color that the resource ID maps to
        int color = getColor(getContext(), mColorResourceId);
        // Set the background color of the text container View
        textContainer.setBackgroundColor(color);

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