用法很簡單，只需要new一個PagerSnapHelper對象attach到RecyclerView對象上沸毁，就能實現(xiàn)了Viewpager的粘性滑動,以下代碼呢是我在網(wǎng)上搜的一個模仿抖音滑動并且需要播放視頻特意封裝的一個類峰髓，使用這個布局管理器直接就能實現(xiàn)和ViewPager類似的布局，但是還是需要動態(tài)的去設(shè)置他的寬度（通常情況下是屏幕的寬度息尺，根據(jù)需求計算）携兵，里面包含的當前item的position的獲取以及item離開界面時候的銷毀監(jiān)聽，感覺很有用搂誉，特意貼出來給大家分享一下徐紧，類里面有大佬的github地址，博客地址我也是找不到了就沒做成鏈接

 /**
     * Created by 釘某人
     * github: https://github.com/DingMouRen
     * email: naildingmouren@gmail.com
     * edit by yc
     */
    
    public class ViewPagerLayoutManager extends LinearLayoutManager {
        private static final String TAG = "ViewPagerLayoutManager";
        private PagerSnapHelper mPagerSnapHelper;
        private OnViewPagerListener mOnViewPagerListener;
        private RecyclerView mRecyclerView;
        private int mDrift;//位移，用來判斷移動方向
    
        public ViewPagerLayoutManager(Context context, int orientation) {
            super(context, orientation, false);
            init();
        }
    
        public ViewPagerLayoutManager(Context context, int orientation, boolean reverseLayout) {
            super(context, orientation, reverseLayout);
            init();
        }
    
        private void init() {
            mPagerSnapHelper = new PagerSnapHelper();
        }
    
        @Override
        public void onAttachedToWindow(RecyclerView view) {
            super.onAttachedToWindow(view);
    
            mPagerSnapHelper.attachToRecyclerView(view);
            this.mRecyclerView = view;
            mRecyclerView.addOnChildAttachStateChangeListener(mChildAttachStateChangeListener);
        }
    
    
        /**
         * 滑動狀態(tài)的改變
         * 緩慢拖拽-> SCROLL_STATE_DRAGGING
         * 快速滾動-> SCROLL_STATE_SETTLING
         * 空閑狀態(tài)-> SCROLL_STATE_IDLE
         *
         * @param state
         */
        @Override
        public void onScrollStateChanged(int state) {
            switch (state) {
                case RecyclerView.SCROLL_STATE_IDLE:
                    View viewIdle = mPagerSnapHelper.findSnapView(this);
                    if (viewIdle != null) {
                        int positionIdle = getPosition(viewIdle);
                        int childCount = getChildCount();
                        if (mOnViewPagerListener != null && getChildCount() <= 2) {
                            mOnViewPagerListener.onPageSelected(positionIdle, positionIdle == getItemCount() - 1);
                        }
                    }
                    break;
                case RecyclerView.SCROLL_STATE_DRAGGING:
                    break;
                case RecyclerView.SCROLL_STATE_SETTLING:
                    break;
                default:
                    break;
            }
        }
    
    
        /**
         * 監(jiān)聽豎直方向的相對偏移量
         *
         * @param dy
         * @param recycler
         * @param state
         * @return
         */
        @Override
        public int scrollVerticallyBy(int dy, RecyclerView.Recycler recycler, RecyclerView.State state) {
            this.mDrift = dy;
            return super.scrollVerticallyBy(dy, recycler, state);
        }
    
    
        /**
         * 監(jiān)聽水平方向的相對偏移量
         *
         * @param dx
         * @param recycler
         * @param state
         * @return
         */
        @Override
        public int scrollHorizontallyBy(int dx, RecyclerView.Recycler recycler, RecyclerView.State state) {
            this.mDrift = dx;
            return super.scrollHorizontallyBy(dx, recycler, state);
        }
    
        /**
         * if return >= 0 snap is exist
         * if return < 0 snap is not exist
         *
         * @return
         */
        public int findSnapPosition() {
            View viewIdle = mPagerSnapHelper.findSnapView(this);
            if (viewIdle != null) {
                return getPosition(viewIdle);
            } else {
                return -1;
            }
        }
    
        /**
         * 設(shè)置監(jiān)聽
         *
         * @param listener
         */
        public void setOnViewPagerListener(OnViewPagerListener listener) {
            this.mOnViewPagerListener = listener;
        }
    
        private RecyclerView.OnChildAttachStateChangeListener mChildAttachStateChangeListener = new RecyclerView.OnChildAttachStateChangeListener() {
            @Override
            public void onChildViewAttachedToWindow(View view) {
                if (mOnViewPagerListener != null && getChildCount() == 1) {
                    mOnViewPagerListener.onInitComplete();
                }
            }
    
            @Override
            public void onChildViewDetachedFromWindow(View view) {
                if (mOnViewPagerListener != null) {
                    if (mDrift >= 0) {
                        mOnViewPagerListener.onPageRelease(true, getPosition(view));
                    } else {
                        mOnViewPagerListener.onPageRelease(false, getPosition(view));
                    }
                }
    
            }
        };
    }



/**
 * Created by 釘某人
 * github: https://github.com/DingMouRen
 * email: naildingmouren@gmail.com
 * 用于ViewPagerLayoutManager的監(jiān)聽
 *
 * @author yc
 */

public interface OnViewPagerListener {


    /**
     * 初始化第一個View
     */
    void onInitComplete();


    /**
     * 選中的監(jiān)聽以及判斷是否滑動到底部
     *
     * @param position
     * @param isBottom
     */
    void onPageSelected(int position, boolean isBottom);


    /**
     * 釋放的監(jiān)聽
     *
     * @param isNext
     * @param position
     */
    void onPageRelease(boolean isNext, int position);
}