我们可以用

@Override
 public void onWindowFocusChanged(boolean hasFocus) {
  super.onWindowFocusChanged(hasFocus);
  //Here you can get the size!
 }

你调用getWidth()太早了。UI还没有在屏幕上调整大小和布局。

无论如何，我怀疑您是否想要做您正在做的事情——动画小部件不会改变它们的可点击区域，因此无论它如何旋转，按钮仍然会对原始方向的点击做出响应。

也就是说，您可以使用维度资源来定义按钮大小，然后从布局文件和源代码中引用该维度资源，以避免此问题。

正如Ian在这篇Android开发者文章中所述:

Anyhow, the deal is that layout of the contents of a window happens after all the elements are constructed and added to their parent views. It has to be this way, because until you know what components a View contains, and what they contain, and so on, there's no sensible way you can lay it out. Bottom line, if you call getWidth() etc. in a constructor, it will return zero. The procedure is to create all your view elements in the constructor, then wait for your View's onSizeChanged() method to be called -- that's when you first find out your real size, so that's when you set up the sizes of your GUI elements. Be aware too that onSizeChanged() is sometimes called with parameters of zero -- check for this case, and return immediately (so you don't get a divide by zero when calculating your layout, etc.). Some time later it will be called with the real values.

我们可以用

@Override
 public void onWindowFocusChanged(boolean hasFocus) {
  super.onWindowFocusChanged(hasFocus);
  //Here you can get the size!
 }

芬兰湾的科特林:

由于使用视图，我曾面临过一次生产崩溃。高度/视图。宽度导致NaN，而我使用view .post()，有时视图尺寸返回0值。

So,

使用视图。doOnPreDraw{//你的动作在这里}，这是:

OneShotPreDrawListener，所以它只调用一次。 实现OnPreDrawListener，确保视图被布局和测量

这是一个有点旧，但我自己有麻烦(需要在一个片段中创建动画对象)。这个解决方案对我来说很有效，我相信这是不言自明的。

class YourFragment: Fragment() {
    var width = 0
    var height = 0


override fun onCreateView(
    inflater: LayoutInflater, container: ViewGroup?,
    savedInstanceState: Bundle?
): View? {
    // Inflate the layout for this fragment
    val root = inflater.inflate(R.layout.fragment_winner_splash, container, false)
    container?.width.let {
        if (it != null) {
            width = it
        }
    }
    container?.height.let {
        if (it != null) {
            height = it
        }
    }
    
    return root
}