检索错误的负适配器位置

Question

我使用下面的代码填充包含图像视图的回收站视图，并且效果很好

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    >
    <LinearLayout
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:orientation="vertical"
        >
        <!-- Put the boxes here and make all of them have a height 0dp, and layout weight as 1 -->
    </LinearLayout>
    <!-- the navigation box goes here with a specific height-->
</FrameLayout>

}

但是当我使用

public class PopularImageAdapter extends RecyclerView.Adapter<PopularImageAdapter.PhotoViewHolder> {

private static final int PHOTO_ANIMATION_DELAY = 600;
private static final Interpolator INTERPOLATOR = new DecelerateInterpolator();

private List<FeedItem> feedItems;
private Context context;
private final int cellSize;


private int lastAnimatedItem = -1;
private boolean lockedAnimations = false;
private OnPhotoFeedItemClickListener onFeedItemClickListener;

public PopularImageAdapter(Context context, List<FeedItem> feedItems){
    this.context = context;
    this.feedItems = feedItems;
    this.cellSize = Utils.getScreenWidth(context) / 3;
}


@NonNull
@Override
public PopularImageAdapter.PhotoViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(context).inflate(R.layout.item_photo, parent, false);
    StaggeredGridLayoutManager.LayoutParams layoutParams = (StaggeredGridLayoutManager.LayoutParams) view.getLayoutParams();
    layoutParams.height = cellSize;
    layoutParams.width = cellSize;
    layoutParams.setFullSpan(false);
    view.setLayoutParams(layoutParams);
    PhotoViewHolder cellFeedViewHolder = new PhotoViewHolder(view);
    setupClickableViews(view,cellFeedViewHolder);
    return new PhotoViewHolder(view);
}

private void setupClickableViews(final View view,final PhotoViewHolder cellFeedViewHolder) {
    cellFeedViewHolder.ivPhoto.setOnClickListener(v -> onFeedItemClickListener.onPhotoClick(view, cellFeedViewHolder.getAdapterPosition(),feedItems));
}

@Override
public void onBindViewHolder(@NonNull PopularImageAdapter.PhotoViewHolder holder,final int position) {
    holder.bindView(feedItems.get(position));
    FeedItem item = feedItems.get(position);

    Picasso.with(context)
            .load(item.getImge())
            .resize(cellSize, cellSize)
            .centerCrop()
            .into(holder.ivPhoto, new Callback() {
                @Override
                public void onSuccess() {
                    animatePhoto(holder);
                }

                @Override
                public void onError() {

                }
            });
    if (lastAnimatedItem < position) lastAnimatedItem = position;
}

private void animatePhoto(PhotoViewHolder viewHolder) {
    if (!lockedAnimations) {
        if (lastAnimatedItem == viewHolder.getAdapterPosition()) {
            setLockedAnimations(true);
        }

        long animationDelay = PHOTO_ANIMATION_DELAY + viewHolder.getAdapterPosition() * 30;

        viewHolder.flRoot.setScaleY(0);
        viewHolder.flRoot.setScaleX(0);

        viewHolder.flRoot.animate()
                .scaleY(1)
                .scaleX(1)
                .setDuration(200)
                .setInterpolator(INTERPOLATOR)
                .setStartDelay(animationDelay)
                .start();
    }
}

public void setLockedAnimations(boolean lockedAnimations) {
    this.lockedAnimations = lockedAnimations;
}

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

public void setOnFeedItemClickListener(OnPhotoFeedItemClickListener onFeedItemClickListener) {
    this.onFeedItemClickListener = onFeedItemClickListener;
}

public interface OnPhotoFeedItemClickListener {
    void onPhotoClick(View v,int position, List<FeedItem> feedItems);
}

public static class PhotoViewHolder extends RecyclerView.ViewHolder {
    @BindView(R.id.flRoot)
    FrameLayout flRoot;
    @BindView(R.id.ivPhoto)
    ImageView ivPhoto;

    FeedItem feedItem;

    PhotoViewHolder(View view) {
        super(view);
        ButterKnife.bind(this, view);
    }

    void bindView(FeedItem feedItem){
        this.feedItem = feedItem;
    }

}

我收到一条错误消息，表明我的适配器位置是-1，我不确定-1的来源，因为即使我删除了初始化为-1的全局变量，我仍然得到-1作为适配器位置

Answer 1

在您的onCreateViewHolder方法中，您将返回PhotoViewHolder的新实例，而不是在其中定义点击次数的cellFeedViewHolder。