我正在尝试按位置获取 subview 。单击一项时我可以查看:

rvSellRecords.addOnItemTouchListener(new RecyclerItemClickListener(getActivity(), new RecyclerItemClickListener.OnItemClickListener() {
        @Override
        public void onItemClick(View view, int position) {
            ((MainActivity) getActivity()).showSellRecordFragment(position, view);
        }
    }));

现在我无法在不点击的情况下获得 subview - 例如按位置:

rvSellRecords.someMagicalMethodWhichReturnsViewByPosition(5);

问题:如何从 RecyclerView 获取 subview ？

为赏金编辑:

我有 RecyclerView 来显示产品列表。当我点击它时，我正在添加新的 Fragment 来显示产品信息。打开时，我正在使用 RecyclerView 的 View 更新工具栏 - 这工作得很好:

    rvSellRecords.addOnItemTouchListener(new RecyclerItemClickListener(getContext(), new RecyclerItemClickListener.OnItemClickListener() {
                    @Override
                    public void onItemClick(View view, int position) {
                        sellPresenter.onSellRecordSelected(position, view);
                    }
                }));

    When I click blue button with "+", I am incrementing quantity by 1.





    public void onIncrementButtonClicked(){
                sellRecord.setCount(sellRecord.getCount() + 1);
                showQuantity();
                bus.post(new SellRecordChangedEvent(sellRecord, sellRecordPosition));
                }

Then I am posting updated sellRecord to first fragment using EventBus. There I am updating list data. I supposed that updating value(sell) automatically updates adapter. Now I am getting view from adapter using custom method(getView) which was created by me(you can find it below).



 @Subscribe
public void onEvent(SellRecordChangedEvent event){
    sell.getSellRecords().set(event.getSellRecordPosition(), event.getSellRecord());
    sell.recalculate();
    int position = event.getSellRecordPosition();
    View view = adapter.getView(position);
    bus.post(new TransactionTitleChangedEvent(null, view));
}

This is my adapter class - I changed adapter little bit to collect view in list and added method which returns view for respective position:



public class SellRecordsAdapter extends RecyclerView.Adapter<SellRecordsAdapter.ViewHolder> {

    .....
    .....
    .....
    List<View> viewList;

    public SellRecordsAdapter(List<SellRecord> sellRecordList) {

        .....

        viewList = new ArrayList<>();
    }

    .....
    .....
    .....

    @Override
    public void onBindViewHolder(ViewHolder viewHolder, int i) {

        .....
        .....
        .....

        viewList.add(i, viewHolder.itemView);

    }


    public View getView(int position){
        return viewList.get(position);
    }

}

我的问题:当我在工具栏中更新 View 时，我的 View 变旧了。当数量为 3 时，我得到 2 的 View 。当数量 10 - View 是 9 时。

我的问题:如何使用项目的位置从回收器 View 中获取 View (没有点击监听器)？

最佳答案

使用 recyclerView.findViewHolderForLayoutPosition(position) 或 reyclerView.findViewHolderForAdapterPosition(position) 获取位置的viewholder。然后你可以从你的viewholder访问任何 child 。

结帐Recyclerview

关于android - 如何从 RecyclerView 获取 subview ？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/35428735/