<color name="gray_b7">#F5F5F5</color>//activity背景色，itemview底部（横向栅格条）背景色，itemview主色白

设置竖向栅格条

adapter中设置

        int w = MainApplication.getnScreenWidth();holder.itemView.setMinimumWidth(w);if (position%2==0){holder.itemView.setPadding(0,0,8,0);}else {holder.itemView.setPadding(8,0,0,0);}