public void setDividerVertical(Drawable dividerVertical) { if (!isDefaultItemDecoration || mVerticalDividerHeight <= 0) return; if (this.mVerticalDivider != dividerVertical) { this.mVerticalDivider = dividerVertical; } if (null == mFamiliarDefaultItemDecoration) { addDefaultItemDecoration(); } else { mFamiliarDefaultItemDecoration.setVerticalDividerDrawable(mVerticalDivider); if (null != mWrapFamiliarRecyclerViewAdapter) { mWrapFamiliarRecyclerViewAdapter.notifyDataSetChanged(); } } }