《Android 基础（四十三）》 SnapHelper

1. 简介

先看看英文介绍

/**
 * Class intended to support snapping for a {@link RecyclerView}.
 * <p>
 * SnapHelper tries to handle fling as well but for this to work properly, the
 * {@link RecyclerView.LayoutManager} must implement the {@link ScrollVectorProvider} interface or
 * you should override {@link #onFling(int, int)} and handle fling manually.
 */