recyclerView平滑滚动(动画滚动)并置顶

最新推荐文章于 2025-06-26 15:10:49 发布

原创最新推荐文章于 2025-06-26 15:10:49 发布 · 5.1k 阅读

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本文介绍了一行代码实现RecyclerView平滑滚动到指定位置的方法，通过自定义RecyclerViewScrollHelper类，利用LinearLayoutManager和TopSmoothScroller实现。适用于需要快速定位列表项的应用场景。

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一行代码解决：
RecyclerViewScrollHelper.scrollToPosition(recyclerView,position);

RecyclerViewScrollHelper源码:


public class RecyclerViewScrollHelper {
    public static void scrollToPosition(RecyclerView recyclerView, int position){
        RecyclerView.LayoutManager manager1 = recyclerView.getLayoutManager();
        if (manager1 instanceof LinearLayoutManager) {
            LinearLayoutManager manager = (LinearLayoutManager) manager1;
            final TopSmoothScroller mScroller = new TopSmoothScroller(recyclerView.getContext());
            mScroller.setTargetPosition(position);
            manager.startSmoothScroll(mScroller);
        }
    }

    public static class TopSmoothScroller extends LinearSmoothScroller {
        TopSmoothScroller(Context context) {
            super(context);
        }
        @Override
        protected int getHorizontalSnapPreference() {
            return SNAP_TO_START;
        }
        @Override
        protected int getVerticalSnapPreference() {
            return SNAP_TO_START;
        }
    }
}