带有动画的Android recyclerview问题

Question

我正在尝试在recyclerview中扩展cardviews.我让扩展部分工作,但是当添加转换时,一些视觉错误开始发生.当没有屏幕外项目时,转换工作正常,但当我向Recyclerview添加超过(在我的情况下)4个项目时,它开始发生.

GIF有4件商品

GIF超过4项

当禁用过渡动画时,cardview扩展可以正常使用4个以上的项目.我认为问题与职位变化有关,但我无法找到解决问题的办法.

我用来实现cardview扩展的指南可以在这里找到:https://stackoverflow.com/a/38623873/6673949

还有我完整的recyclerview适配器

public class BasketRecyclerAdapter extends RecyclerView.Adapter<BasketRecyclerAdapter.CustomViewHolder> {
private String letter;
private Context mContext;
private ColorGenerator generator = ColorGenerator.MATERIAL;
private List<Basket> baskets;
private int mExpandedPosition = -1;
private RecyclerView r1;

public BasketRecyclerAdapter(Context context, List<Basket> baskets, RecyclerView r1) {
    this.mContext = context;
    this.baskets = baskets;
    this.r1 = r1;

}

@Override
public CustomViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
    View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.basket_menu_item, null);
    CustomViewHolder viewHolder = new CustomViewHolder(view);
    return viewHolder;
}

@Override
public void onBindViewHolder(final BasketRecyclerAdapter.CustomViewHolder holder, final int position) {

    String basketName = baskets.get(position).getBasketName();

    holder.basketName.setText(basketName);

    letter = "" + basketName.charAt(0);

    TextDrawable drawable = TextDrawable.builder()
            .buildRound(letter, generator.getColor(basketName));


    holder.imageLetter.setImageDrawable(drawable);

    final boolean isExpanded = position == mExpandedPosition;
    holder.expandedLayout.setVisibility(isExpanded?View.VISIBLE:View.GONE);
    holder.itemView.setActivated(isExpanded);
    holder.itemView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            mExpandedPosition = isExpanded ? -1:position;
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
                TransitionManager.beginDelayedTransition(r1);
            }
            notifyDataSetChanged();
        }
    });


}

可以做些什么来解决这个问题？谢谢.

编辑:我试图通过使用ListView而不是RecyclerView使其工作,但ListView适配器不会使用相同的代码扩展 - 将尝试找出原因.

Edit2:通过使用另一个名为"ExpandableLayout"的库来实现它,但似乎仍无法弄清楚为什么没有其他库就无法工作.

Answer 1

我有类似的问题。添加适配器：

@Override
public long getItemId(int position) {
    return position;
}

和myAdapter.setHasStableIds(true);