Android框架的哪一部分负责播放动画？
与此问题相关，我试图找出 Android 类库中负责播放 Animation 的部分。查看源代码，动画类似乎只是计算动画对象所经历的变换，但它们不负责实际“播放”动画，即以给定的帧速率将变换后的对象渲染到屏幕上。
一段时间以来，我一直在筛选 View 和 ImageView 的源代码，但我无法确定实际将每个转换绘制到屏幕上的代码所在的位置。
有什么想法吗？
澄清一下，我知道为了播放动画，您只需将其粘贴在 View 中并调用 startAnimation，但我想了解 的哪些部分code>View 或相关类实现这些位。
Related to this question, I am trying to figure out the parts of the Android class library that are responsible for playing an Animation. Looking at the sources, the Animation classes seem to merely compute the transformations an animated object undergoes, but they are not responsible for actually "playing" the animation, i.e. rendering the transformed object to the screen at a given frame rate.
I have been sifting through the source code of View and ImageView for some time now, but I can't make out where the code sits that actually draws each transformation to the screen.
Any ideas?
To clarify, I know that in order to play back an animation, you simply stick it in a View and call startAnimation, but I'd like to understand which parts of View or related classes implement these bits.
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你应该看看 android 代码。从
View类的startAnimation方法开始。我认为，在视图类中，应用转换后，它会调用invalidate()，将其余部分留给图形引擎。android 文档说
在此处获取完整摘要
You should look into the android code. Start at
startAnimationmethod of theViewclass. I think, in view class, after applying the transformation it callsinvalidate()which leaves the rest to the graphics engine.The android docs say
Get the whole summary here