Android，蜂窝动画（“动画器只能在 Looper 线程上运行”）错误
我以前有一个项目，在该项目中，我通常可以使用 ObjectAnimator 类来为任何像这样的类设置动画
ObjectAnimator oa = ObjectAnimator.ofFloat(testShape, "translateX", 0f, 000f);
oa.setDuration(1000l);
oa.setRepeatCount(ObjectAnimator.REVERSE);
oa.setRepeatMode(ObjectAnimator.RESTART);
oa.start();
……并且运行得很好，没有任何问题。现在，当我尝试运行相同的设置时，
W/dalvikvm(19053): threadid=10: thread exiting with uncaught exception (group=0x400d1760)
E/AndroidRuntime(19053): FATAL EXCEPTION: Animation Thread
E/AndroidRuntime(19053): android.util.AndroidRuntimeException: Animators may only be run on Looper threads
E/AndroidRuntime(19053): at android.animation.ValueAnimator.start(ValueAnimator.java:900)
E/AndroidRuntime(19053): at android.animation.ValueAnimator.start(ValueAnimator.java:931)
E/AndroidRuntime(19053): at android.animation.ObjectAnimator.start(ObjectAnimator.java:282)
E/AndroidRuntime(19053): at com.processing.test.Run.setup(Run.java:43)
我尝试在绘制循环中添加 Looper.prepare() 和 Looper.loop() 但无济于事。因为我以前根本没有使用过 Looper 类，所以这是一种不受欢迎的方法。
这可能是我的底层库（在本例中为processing-android）的版本问题，还是由于 Honeycomb 从 3.0 更改为 3.1，
谢谢
I had a previous project in which I could generically use the ObjectAnimator class to animate any class like this
ObjectAnimator oa = ObjectAnimator.ofFloat(testShape, "translateX", 0f, 000f);
oa.setDuration(1000l);
oa.setRepeatCount(ObjectAnimator.REVERSE);
oa.setRepeatMode(ObjectAnimator.RESTART);
oa.start();
...and that would run great, no issues. Now when i try to run the same setup i get
W/dalvikvm(19053): threadid=10: thread exiting with uncaught exception (group=0x400d1760)
E/AndroidRuntime(19053): FATAL EXCEPTION: Animation Thread
E/AndroidRuntime(19053): android.util.AndroidRuntimeException: Animators may only be run on Looper threads
E/AndroidRuntime(19053): at android.animation.ValueAnimator.start(ValueAnimator.java:900)
E/AndroidRuntime(19053): at android.animation.ValueAnimator.start(ValueAnimator.java:931)
E/AndroidRuntime(19053): at android.animation.ObjectAnimator.start(ObjectAnimator.java:282)
E/AndroidRuntime(19053): at com.processing.test.Run.setup(Run.java:43)
I have tried to add the Looper.prepare() and Looper.loop() in my draw loops but to no avail. Since I haven't had to use the Looper class at all previously though, this is an undesired approach.
Could this be a version issue with my underlying lib (processing-android in this case) or is it due to a change in Honeycomb from 3.0 to 3.1
thanks
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查看 ObjectAnimator 的文档，情况似乎没有发生变化：您可能只需要确保从 UI 线程进行调用：要么确保在事件处理程序方法中调用它，要么使用处理程序实例或使用实际运行动画的 Runnable 执行 View.post() 。您是否突然开始从不同位置调用
start？Looking at the docs for ObjectAnimator it doesn't appear that things changed: what you probably just need to do is make sure you are making the call from the UI thread: either make sure it is being called in an event handler method, use a Handler instance or do View.post() with a Runnable that actually runs the animation. Did you suddenly start invoking
startfrom a different location?