关于FamiliarDefaultItemDecoration

[guowenz]

我看了下源码，会设置一个默认的mFamiliarDefaultItemDecoration，我看了下getItemOffsets方法，方法最后面有这么一段
int topOrLeftSize;
if ((!isHeaderDividersEnabled || headersCount == 0) && position - headersCount == 0) {
topOrLeftSize = 0;
} else {
topOrLeftSize = mOrientation == OrientationHelper.VERTICAL ? mHorizontalDividerDrawableHeight : mVerticalDividerDrawableHeight;
}

if (mOrientation == OrientationHelper.HORIZONTAL) {
outRect.set(topOrLeftSize, mItemViewBothSidesMargin, 0, mItemViewBothSidesMargin);
} else {
outRect.set(mItemViewBothSidesMargin, topOrLeftSize, mItemViewBothSidesMargin, 0);
}

我的case是在这里面走了else的分支，导致出现了1像素的偏移，被设计师发现了