Question

为什么我收到错误“无法解析list_item”我正在扩展超类，但无法访问list_item。为什么我在这里失踪？这是构建miwok app的udacity课程的一部分。在Android Studio中。感谢

    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;
    }
}

Answer 1

我认为你对this one提出了类似的问题。

您应该在布局文件夹中创建list_item.xml。

list_item.xml：

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/miwok_text_view"
    android:layout_width="match_parent"
    android:layout_height="55dp"
    android:textSize="15sp"
    android:paddingTop="3dp"
    android:paddingBottom="3dp"
    android:textColor="#000000"/>

如果从超类继承，为什么我在list_item中收到错误

1 个答案: