Android：如何检查ScrollView内的View是否可见？

我有一个ScrollView其中持有一系列Views。我希望能够确定视图当前是否可见（如果它的任何部分当前由ScrollView）。我希望下面的代码可以做到这一点，令人惊讶的是它没有：

Rect bounds = new Rect();
view.getDrawingRect(bounds);

Rect scrollBounds = new Rect(scroll.getScrollX(), scroll.getScrollY(), 
        scroll.getScrollX() + scroll.getWidth(), scroll.getScrollY() + scroll.getHeight());

if(Rect.intersects(scrollBounds, bounds))
{
    //is  visible
}

这有效：

Rect scrollBounds = new Rect();
scrollView.getHitRect(scrollBounds);
if (imageView.getLocalVisibleRect(scrollBounds)) {
    // Any portion of the imageView, even a single pixel, is within the visible window
} else {
    // NONE of the imageView is within the visible window
}