关于recycleView高度获取问题

2023年7月11日 497次阅读 来源: carlZzzzzzz

在项目中可能需要获取到相关RecycleView的高度，下面有几个api可能会对你有帮助：
1、computeVerticalScrollExtent()是当前屏幕显示的区域高度
2、computeVerticalScrollOffset() 是当前屏幕之前滑过的距离
3、computeVerticalScrollRange()是整个RecycleView控件的高度
4、recyclerView.getLastVisiblePosition()获取当前可见的最后一个item的position

getLastVisiblePosition()方法可以通过下面的代码获取：

    public int getLastVisiblePosition() {
    RecyclerView.LayoutManager layoutManager = this.getLayoutManager();
    if (layoutManager instanceof LinearLayoutManager) {
        LinearLayoutManager linearManager = (LinearLayoutManager) layoutManager;
        int lastItemPosition = linearManager.findLastVisibleItemPosition();
        return lastItemPosition;

    }

    if (layoutManager instanceof GridLayoutManager) {
        GridLayoutManager gridLayoutManager = (GridLayoutManager) layoutManager;
        int lastItemPosition = gridLayoutManager.findLastVisibleItemPosition();
        return lastItemPosition;

    }

    if (layoutManager instanceof StaggeredGridLayoutManager) {
        StaggeredGridLayoutManager staggeredGridLayoutManager = (StaggeredGridLayoutManager) layoutManager;
        int first[] = new int[staggeredGridLayoutManager.getSpanCount()];
        staggeredGridLayoutManager.findLastVisibleItemPositions(first);

        ArrayList<Integer> list = new ArrayList<>(first.length);
        if (list == null || list.size() == 0) {
            return -1;
        }
        return list.get(list.size() - 1);
    }

    return -1;

}
    原文作者：carlZzzzzzz
    原文地址: https://blog.csdn.net/qyuewei/article/details/72877891
    本文转自网络文章，转载此文章仅为分享知识，如有侵权，请联系博主进行删除。
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