public void setDividerDrawableHorizontal(Drawable divider) {
        if (divider == mDividerDrawableHorizontal) {
            return;
        }
        mDividerDrawableHorizontal = divider;
        if (divider != null) {
            mDividerHorizontalHeight = divider.getIntrinsicHeight();
        } else {
            mDividerHorizontalHeight = 0;
        }
        setWillNotDrawFlag();
        requestLayout();
    }
Set a drawable to be used as a horizontal divider between items.

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