麻烦看下空指针这个错误

[itzhaokun]

java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.support.v7.widget.RecyclerView$LayoutManager.canScrollVertically()' on a null object reference
at com.xuezj.cardbanner.view.CardView.findViewAtCenter(CardView.java:163)
at com.xuezj.cardbanner.view.CardView.onLayout(CardView.java:67)