Android RecyclerView StaggeredGrid项在滚动顶部时更改位置

在我的2列交错网格中，我使用无限列表的效果自动按10乘10加载元素，除了向上滚动时，其他所有东西都工作正常。前两个元素更改其位置。就像前两个项目从一列跳到另一列一样。

如我所读，适配器必须保存每个元素的状态。但是，我不知道该怎么做。

这是我用来显示StaggeredGrid功能的主要代码

public class SpacesItemDecoration extends RecyclerView.ItemDecoration {
    private int space;

    public SpacesItemDecoration(int space) {
        this.space = space;
    }

    @Override
    public void getItemOffsets(Rect outRect, View view,
                               RecyclerView parent, RecyclerView.State state) {
        outRect.left = space;
        outRect.right = space;
        outRect.bottom = space+1;

        // Add top margin only for the first item to avoid double space between items
        if(parent.getChildLayoutPosition(view) == 0)
            outRect.top = space;
    }
}

public class SolventViewHolders extends RecyclerView.ViewHolder implements View.OnClickListener {

    public TextView vh_name;
    public TextView vh_price;
    public ImageView vh_image;

    public SolventViewHolders(View v) {
        super(v);
        v.setOnClickListener(this);

        vh_image=(ImageView)v.findViewById(R.id.thumbnail);
        vh_name= (TextView) v.findViewById(R.id.title);
        vh_price= (TextView) v.findViewById(R.id.subtitle);
    }

    public void sendImage(String url) {
        Picasso.with(ctx)
                .load(url)
                .into(vh_image);
    }
    @Override
    public void onClick(View view) {
        int position = getPosition();

        if (user_id != null) {

            openDetail(MyLogs.get(position).getId_item(), MyLogs.get(position).getItemName(), MyLogs.get(position).getPrice(), MyLogs.get(position).getDescrip(), MyLogs.get(position).getId_store(), MyLogs.get(position).getId_store());
        }
    }
}

public class SolventRecyclerViewAdapter  extends RecyclerView.Adapter {


    private List itemList;
    private Context context;

    public SolventRecyclerViewAdapter(Context context, List itemList) {
        this.itemList = itemList;
        this.context = context;
    }
    @Override
    public SolventViewHolders onCreateViewHolder(ViewGroup parent, int viewType) {

        View layoutView = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_mosaico_defoult, null);
        SolventViewHolders rcv = new SolventViewHolders(layoutView);

        return rcv;
    }

    @Override
    public void onBindViewHolder(SolventViewHolders holder, int position) {

        holder.vh_name.setText(itemList.get(position).getName());
        holder.vh_price.setText("CLP:"+itemList.get(position).getPrice());

    }

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

＃编辑1：

这就是我实例化适配器的方式

 recyclerView = (RecyclerView)view.findViewById(R.id.recycler_view);
    recyclerView.setHasFixedSize(true);

    gaggeredGridLayoutManager = new StaggeredGridLayoutManager(2, 1);
    recyclerView.setLayoutManager(gaggeredGridLayoutManager);
    recyclerView.addItemDecoration(new SpacesItemDecoration(2));

    populateList(currentPage);

    rcAdapter= new SolventRecyclerViewAdapter(ctx, MyLogs);
    recyclerView.setAdapter(rcAdapter);

populate方法作为json格式的asyntask响应发生：

                            ...
            for(int i=0; i < lengthJsonArr; i++)
            {

                JSONObject jsonChildNode = jsonMainNode.getJSONObject(i);

                           ...

                MyLogs.add("name,price,etc");
                rcAdapter.notifyDataSetChanged();

            }

这就是我保持onScroll的方式：

 recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
        @Override
        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {

            visibleItemCount = gaggeredGridLayoutManager.getChildCount();
            totalItemCount = gaggeredGridLayoutManager.getItemCount();
            int[] firstVisibleItems = null;
            firstVisibleItems = gaggeredGridLayoutManager.findFirstVisibleItemPositions(firstVisibleItems);
            if (firstVisibleItems != null && firstVisibleItems.length > 0) {
                pastVisiblesItems = firstVisibleItems[0];
            }

            if (loading) {
                if ((visibleItemCount + pastVisiblesItems) >= totalItemCount) {
                    loading= false;
                    Log.d("tag", "LOAD NEXT ITEM");
                    currentPage = currentPage + 1;
                    populateList(currentPage);
                }
            }
        }
    });

感谢您的帮助

这是一个功能。重新排序和重新定位视图以实现无缝的项目组合。

使用 setGapStrategy(int gapStrategy)

设置StaggeredGridLayoutManager的间隙处理策略。如果gapStrategy参数不同于当前策略，则调用此方法将触发布局请求。

您可能会想要GAP_HANDLING_NONE。

没有做任何事情来掩盖差距。