RecyclerView 改变GridLayout垂直间隔

  recyclerView.addItemDecoration(new ItemDecoration() {
        @Override
        public void getItemOffsets(Rect outRect, View view, RecyclerView parent, State state) {
            outRect.left=0;//左间距
            outRect.bottom=0;//与底部的间距
            super.getItemOffsets(outRect, view, parent, state);
        }
 });