findSnapView.java

@Override
View findSnapView(RecyclerView.LayoutManager layoutManager) {
    OrientationHelper helper = layoutManager.canScrollHorizontally()
            ? OrientationHelper.createHorizontalHelper(layoutManager)
            : OrientationHelper.createVerticalHelper(layoutManager);
    int childCount = layoutManager.getChildCount();
    View closestChild = null;
    int containerStart = helper.getStartAfterPadding();
    int absClosest = Integer.MAX_VALUE;
    for (int i = 0; i < childCount; i++) {
        int childStart = helper.getDecoratedStart(targetView);
        int absDistance = Math.abs(childCenter - containerCenter);
        if (absDistance < absClosest) {
            absClosest = absDistance;
            closestChild = child;
        }
    }
    return closestChild;
}