public int setFooterView(View header) {
        return setFooterView(header, 0, LinearLayout.VERTICAL);
    }
Add footer view to mFooterLayout and set footer view position in mFooterLayout.
When index = -1 or index >= child count in mFooterLayout,
the effect of this method is the same as that of {@link #addFooterView(View)}.

@param footer
@param index  the position in mFooterLayout of this footer.
              When index = -1 or index >= child count in mFooterLayout,
              the effect of this method is the same as that of {@link #addFooterView(View)}.
common/src/main/java/com/sxjs/common/base/baseadapter/BaseQuickAdapter.java