android - RecyclerView 在滚动后选择错误的项目 onClick

Question

我有一个基于 RealmRecyclerViewAdapter 的 recyclerviewAdapter。

public class PlaceAdapter extends RealmRecyclerViewAdapter<Place, PlaceAdapter.PlaceViewHolder> implements Filterable {

private static final String TAG = PlaceAdapter.class.getSimpleName();

static class PlaceViewHolder extends RecyclerView.ViewHolder {

    TextView name;

    PlaceViewHolder(View itemView) {
        super(itemView);
        name = (TextView) itemView.findViewById(R.id.name);
    }
}

private Realm realm;
private static RecyclerViewClickListener itemListener;
private TextView lastTextView;

public PlaceAdapter(@NonNull Context context, @Nullable OrderedRealmCollection data, boolean autoUpdate, RecyclerViewClickListener listener,
                    Realm realm) {
    super(context, data, autoUpdate);
    this.realm = realm;
    itemListener = listener;
}

@Override
public PlaceViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
    View itemView = LayoutInflater.from(viewGroup.getContext()).
            inflate(R.layout.place_item_layout, viewGroup, false);
    return new PlaceViewHolder(itemView);
}

@Override
public void onBindViewHolder(final PlaceViewHolder holder, final int position) {
    final Place place = getData().get(position);
    holder.name.setText(place.getName());

    holder.itemView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            itemListener.recyclerViewListClicked(place.getId());
            holder.name.setTypeface(Typeface.create(holder.name.getTypeface(), Typeface.BOLD), Typeface.BOLD);

            if (lastTextView != null && lastTextView != holder.name) {
                lastTextView.setTypeface(Typeface.create(lastTextView.getTypeface(), Typeface.NORMAL), Typeface.NORMAL);
            }
            notifyItemRangeChanged(0, getItemCount());

            lastTextView = holder.name;
        }
    });
}

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

@Override
public Filter getFilter() {
    final Filter filter = new Filter() {

        @SuppressWarnings("unchecked")
        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {
            String text = constraint.toString();
            if (text == null || "".equals(text)) {
                updateData(realm.where(Place.class).findAll());
            } else {
                updateData(realm.where(Place.class)
                        .contains("name", text, Case.INSENSITIVE) // TODO: change field
                        .findAll());
            }
        }

        @Override
        protected FilterResults performFiltering(CharSequence constraint) {

            FilterResults results = new FilterResults();
            return results;
        }
    };

    return filter;
}

public interface RecyclerViewClickListener {

    void recyclerViewListClicked(int placeId);
}

问题是，当我滚动回收器 View 时，顶部的那些不可见，我单击该 View ，它上方的 View 显示为粗体。只有当我第二次点击它时，我的正确 View 才会变成粗体。

Answer 1

我想你忘了在适配器中覆盖这些方法:

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

    @Override
    public int getItemViewType(int position) {
        return position;
    }

我不确定为什么会发生这种情况，但它是滚动时 Recyclerview 困惑问题的正确解决方案。