如何在“回收者视图"中获取当前可见的物品 [英] how to get current visible item in Recycler View

问题描述

我如何获取"RecyclerView"当前可见的项目.已经尝试过recyclerview的其他方法，但是我无法获得解决方案，所以请帮助并指导我

How i can get the "RecyclerView" current visible item. already try different methods of recyclerview but i can't get the solution so please help and guide me

推荐答案

 private RecyclerView.OnScrollListener recyclerViewOnScrollListener = new RecyclerView.OnScrollListener() {
    @Override
    public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
        super.onScrollStateChanged(recyclerView, newState);
    }

    @Override
    public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
        super.onScrolled(recyclerView, dx, dy);
        int visibleItemCount = linearLayoutManager.getChildCount();
        int totalItemCount = linearLayoutManager.getItemCount();
        int firstVisibleItemPosition = linearLayoutManager.findFirstVisibleItemPosition();
        final int lastItem = firstVisibleItemPosition + visibleItemCount;
    }
};

全局声明LinearLayoutManger，

Declare LinearLayoutManger globally,

私有LinearLayoutManager linearLayoutManager;

private LinearLayoutManager linearLayoutManager;

像这样初始化RecyclerView，

Initialize RecyclerView like this,

linearLayoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
notificationListRecyclerView.setLayoutManager(linearLayoutManager);
notificationListRecyclerView.addOnScrollListener(recyclerViewOnScrollListener);

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