recycleView 横向滚动+item中包含纵向滚动+整页滚

第一步解决横纵滚动嵌套的问题：

拦截法：
外层的recycleView拦截滚动
1.判断（横向滚动的距离>纵向）则自己消费滚动

2. 判断（横向滚动的距离<纵向）则传递滚动

/**
 * 处理滚动冲突的recycleview
 * */
public class KapTouchRecycleView extends RecyclerView {
    private static final String TAG = "KapTouchRecycleView";

    private int mLastXIntercept;
    private int mLastYIntercept;

    public KapTouchRecycleView(Context context) {
        super(context);
    }

    public KapTouchRecycleView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
    }
    // 重新滚动冲突

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        boolean intercepted = false;
        int x = (int) ev.getX();
        int y = (int) ev.getY();
        final int action = ev.getAction() & MotionEvent.ACTION_MASK;
        switch (action) {
            case MotionEvent.ACTION_DOWN:
                intercepted = false;
                //调用ViewPager的onInterceptTouchEvent方法初始化mActivePointerId
                super.onInterceptTouchEvent(ev);
                break;
            case MotionEvent.ACTION_MOVE:
                //横坐标位移增量
                int deltaX = x - mLastXIntercept;
                //纵坐标位移增量
                int deltaY = y - mLastYIntercept;
                if (Math.abs(deltaX)>Math.abs(deltaY)){
                    intercepted = true;
                }else{
                    intercepted = false;
                }
                break;
            case MotionEvent.ACTION_UP:
                intercepted = false;
                break;
            default:
                break;
        }

        mLastXIntercept = x;
        mLastYIntercept = y;
        return intercepted;
    }
}

第二步：解决整页滚动问题：

{
            PagerSnapHelper snapHelper = new PagerSnapHelper();
            snapHelper.attachToRecyclerView(recyclerView);
}

第三部预加载：

思路：当前位置如果临街数组边界，则触发网络请求，预加载数据

如何获取当前位置：

        itemWidth = KapViewFrameSetingHelper.getScreenWidth(getContext()) - (white_view_left_offset*2);  // 此处根据实际显示宽度，自己计算recycleview的显示宽度

// 滚动监听 && 累加记录dx
recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
                @Override
                public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                    super.onScrollStateChanged(recyclerView, newState);
                    if (newState == RecyclerView.SCROLL_STATE_IDLE){
                        int currentIndex = (overallXScroll+10)/itemWidth;
                        if (currentIndex < 3) loadBeforeModelDatas();
                        if ((contentLists.size() - currentIndex) < 3) loadAfterModelDatas();
                    }
                }

                @Override
                public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                    super.onScrolled(recyclerView, dx, dy);
                overallXScroll += dx; // 记录滚动偏移
                }
            });
// loadBeforeModelDatas  别忘了追加到overallXScroll
overallXScroll += (itemWidth*models.size());// 追加一下整页滚动的偏移
// 如果有item的删除也别忘了 更改overallXScroll
if (position < (overallXScroll+10)/itemWidth) overallXScroll -= itemWidth;