如何使用 RecyclerView 实现无限列表? [英] How to implement endless list with RecyclerView?

问题描述

我想将 ListView 更改为 RecyclerView.我想使用 OnScrollListener<的 onScrollRecyclerView 中的/code> 以确定用户是否滚动到列表的末尾.

I would like to change ListView to RecyclerView. I want to use the onScroll of the OnScrollListener in RecyclerView to determine if a user scrolled to the end of the list.

我如何知道用户是否滚动到列表末尾以便我可以从 REST 服务获取新数据?

How do I know if a user scrolls to the end of the list so that I can fetch new data from a REST service?

推荐答案

感谢@Kushal，这就是我实现它的方式

Thanks to @Kushal and this is how I implemented it

private boolean loading = true;
int pastVisiblesItems, visibleItemCount, totalItemCount;

mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
    @Override
    public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
        if (dy > 0) { //check for scroll down
            visibleItemCount = mLayoutManager.getChildCount();
            totalItemCount = mLayoutManager.getItemCount();
            pastVisiblesItems = mLayoutManager.findFirstVisibleItemPosition();

            if (loading) {
                if ((visibleItemCount + pastVisiblesItems) >= totalItemCount) {
                    loading = false;
                    Log.v("...", "Last Item Wow !");
                    // Do pagination.. i.e. fetch new data

                    loading = true;
                }
            }
        }
    }
});

别忘了添加

LinearLayoutManager mLayoutManager;
mLayoutManager = new LinearLayoutManager(this);
mRecyclerView.setLayoutManager(mLayoutManager);

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