public void setDividerDrawableVertical(Drawable divider) {
        if (divider == mDividerDrawableVertical) {
            return;
        }
        mDividerDrawableVertical = divider;
        if (divider != null) {
            mDividerVerticalWidth = divider.getIntrinsicWidth();
        } else {
            mDividerVerticalWidth = 0;
        }
        setWillNotDrawFlag();
        requestLayout();
    }
Set a drawable to be used as a vertical divider between items.

@param divider Drawable that will divide each item.
@see #setDividerDrawable(Drawable)
@see #setShowDivider(int)
@see #setShowDividerVertical(int)
common/src/main/java/com/sxjs/common/widget/flexboxlayout/FlexboxLayout.java