View.isShown()在按下home键之后，返回了false

http://stackoverflow.com/questions/6796299/view-getvisibility-isshown-return-incorrect-visibility

在做某个帧动画的时候，当有数据的时候停止帧动画。

某次按下了home键，回到桌面，数据已经过来，但是View.isShown()返回了false。

getVisibility() simply returns the visibility you want the view to have when added to the window. It doesn't change unless you call setVisibility(). It also doesn't indicate whether the view is actually visible on screen.

isShown() is similar. Here is the doc:

Returns the visibility of this view and all of its ancestors

Returns
True if this view and all of its ancestors are VISIBLE

使用如下方式解决：

if(textView.getVisibility == View.VISIBLE) {
    // do something
}