SectionDecoration.java 文件源码

@Override
public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) {
    if (mPinnedHeaderView != null) {
        c.save();

        mClipBounds.top = 0;
        c.clipRect(mClipBounds, Region.Op.UNION);
        c.translate(0, mPinnedHeaderTop);
        mPinnedHeaderView.draw(c);

        c.restore();
    }
}