java - 回收站 View + 卡片 View : Inflating Wrong Data

Question

我正在使用 CardView 创建带有时事通讯的卡片列表。基本元素是 3 个 TextView + 1 个 ImageView。我无法正确膨胀 2 个元素:标题很好，但是链接文本得到了错误的字符串(它得到了引用正文文本的字符串)并且正文 TextView 根本没有改变。

Aeres 一张具有一般想法的图片:

preview on android studio (left) and app running on device(right)

这是我的 CardView XML 代码:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
tools:context=".News">

<android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:id="@+id/card1_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    card_view:cardCornerRadius="4dp">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <TextView
            android:id="@+id/news_title"
            android:layout_width="match_parent"
            android:layout_height="40dp"
            android:paddingLeft="8dp"
            android:text="articleTitle articleTitle articleTitle articleTitle articleTitle articleTitle articleTitle articleTitle articleTitle articleTitle articleTitle articleTitle articleTitle articleTitle "
            android:textColor="#000000"
            android:textSize="16sp"
            android:textStyle="bold" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="150dp"
            android:orientation="horizontal">

            <LinearLayout
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="6"
                android:orientation="vertical">

                <TextView
                    android:id="@+id/news_link"
                    android:layout_width="match_parent"
                    android:layout_height="25dp"
                    android:gravity="center_vertical"
                    android:paddingLeft="8dp"
                    android:text="http://www.articleLink.com/" />

                <TextView
                    android:id="@+id/news_body"
                    android:layout_width="match_parent"
                    android:layout_height="120dp"
                    android:paddingLeft="8dp"
                    android:text="Body Body Body Body Body Body Body Body Body Body Body Body Body Body Body Body Body Body Body Body Body Body Body Body Body Body Body Body Body Body Body Body Body ..."
                    android:textColor="#000000" />
            </LinearLayout>

            <ImageView
                android:id="@+id/news_photoId"
                android:layout_width="0dp"
                android:layout_height="145dp"
                android:layout_weight="5"
                android:src="@drawable/enfnotum" />

        </LinearLayout>

        <TextView
            android:layout_width="match_parent"
            android:layout_height="20dp"
            android:gravity="end"
            android:paddingEnd="6dp"
            android:paddingRight="6dp"
            android:text="Coments    Share" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="#bab7b7" />

    </LinearLayout>


</android.support.v7.widget.CardView>

RecycleView 列表布局 XML 代码:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".News">

<android.support.v7.widget.RecyclerView
    android:id="@+id/rv"
    android:scrollbars="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

现在是java类:这里我正在填充列表，调用适配器

 public class News extends AppCompatActivity {

    private List<Article> articles = new ArrayList<>();
    private RecyclerView rv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_news);

        rv = (RecyclerView) findViewById(R.id.rv);
        LinearLayoutManager llm = new LinearLayoutManager(this);
        rv.setLayoutManager(llm);

        initializeData();
        initializeAdapter();
    }

    private void initializeData() {
        articles.add(new Article("0title", "0link", "0body", R.drawable.enfnotum));
        articles.add(new Article("1title", "1link", "1body", R.drawable.enfnoticias));
        articles.add(new Article("2title", "2link", "2body", R.drawable.image1));
        articles.add(new Article("3title", "3link", "3body", R.drawable.image2));
        articles.add(new Article("4title", "4link", "4body", R.drawable.image3));
        articles.add(new Article("5title", "5link", "5body", R.drawable.enfnotum));
        articles.add(new Article("6title", "6link", "6body", R.drawable.image3));
        articles.add(new Article("7title", "7link", "7body", R.drawable.enfnoticias));
        //TODO: database
    }

    private void initializeAdapter() {
        NewsRVAdapter adapter = new NewsRVAdapter(articles);
        rv.setAdapter(adapter);
    }
}

我创建列表对象的类，很少有 getter

    public class Article {

    private String articleTitle;
    private String articleLink;
    private String articleBody;
    private int articlePhotoId;

    public Article(String articleTitle, String articleLink, String articleBody, int articlePhotoId) {
        this.articleTitle = articleTitle;
        this.articleLink = articleLink;
        this.articleBody = articleBody;
        this.articlePhotoId = articlePhotoId;
    }

    public String getArticleTitle() {
        return articleTitle;
    }

    public String getArticleLink() {
        return articleLink;
    }

    public String getArticleBody() {
        return articleBody;
    }

    public int getArticlePhotoId() {
        return articlePhotoId;
    }
}

inflated layout

    public class NewsRVAdapter extends RecyclerView.Adapter<NewsRVAdapter.ArticleViewHolder> {

    List<Article> articles;

    NewsRVAdapter(List<Article> articles) {
        this.articles = articles;
    }

    @Override
    public void onAttachedToRecyclerView(RecyclerView recyclerView) {
        super.onAttachedToRecyclerView(recyclerView);
    }

    @Override
    public ArticleViewHolder onCreateViewHolder(ViewGroup viewGroup, int position) {
        View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.news_item_list, viewGroup, false);
        return new ArticleViewHolder(v);
    }

    @Override
    public void onBindViewHolder(ArticleViewHolder ArticleViewHolder, int position) {
        ArticleViewHolder.articleTitle.setText(articles.get(position).getArticleTitle());
        ArticleViewHolder.articleLink.setText(articles.get(position).getArticleLink());
        ArticleViewHolder.articleLink.setText(articles.get(position).getArticleBody());
        ArticleViewHolder.articlePhotoID.setImageResource(articles.get(position).getArticlePhotoId());
    }

    @Override
    public int getItemCount() {
        return articles.size();
    }

    public static class ArticleViewHolder extends RecyclerView.ViewHolder {

        CardView cv;
        TextView articleTitle;
        TextView articleLink;
        TextView articleBody;
        ImageView articlePhotoID;

        ArticleViewHolder(View itemView) {
            super(itemView);
            cv = (CardView) itemView.findViewById(R.id.card1_view);
            articleTitle = (TextView) itemView.findViewById(R.id.news_title);
            articleLink = (TextView) itemView.findViewById(R.id.news_link);
            articleBody = (TextView) itemView.findViewById(R.id.news_body);
            articlePhotoID = (ImageView) itemView.findViewById(R.id.news_photoId);
        }
    }
}

Answer 1

看起来像是打字错误。尝试将您的 NewsRVAdapter 的 onBindViewHolder 替换为:

@Override
public void onBindViewHolder(ArticleViewHolder ArticleViewHolder, int position) {
ArticleViewHolder.articleTitle.setText(articles.get(position).getArticleTitle());
ArticleViewHolder.articleLink.setText(articles.get(position).getArticleLink());
ArticleViewHolder.articleBody.setText(articles.get(position).getArticleBody());
ArticleViewHolder.articlePhotoID.setImageResource(articles.get(position).getArticlePhotoId());
}