我对获取RecyclerView第一项的大小的正确和第一个可能时刻感兴趣？我试过使用:recyclerView.setLayoutManager(newGridLayoutManager(context,2));recyclerView.setAdapter(newMyDymmyGridRecyclerAdapter(context));recyclerView.getViewTreeObserver().addOnGlobalLayoutListener(newViewTreeObserver.OnGlobalLayoutListener(){@Overridepublicvoido