Android: Applying an animation to a view creates R

I am setting an animation on my view from following the ApiDemo example (see layout_grid_fade.html):

<?xml version="1.0" encoding="utf-8"?>
<gridLayoutAnimation xmlns:android="http://schemas.android.com/apk/res/android"
        android:rowDelay="50%"
        android:directionPriority="column"
        android:animation="@anim/fade" />

and below is my code

mView.startAnimation(AnimationUtils.loadAnimation(ViewModel.this, R.anim.layout_grid_fade));
mView.setImage(modelImages.get(0).image);

but i get exception dont know why? below is my log trace

FATAL EXCEPTION: main
java.lang.RuntimeException: Unknown animation name: gridLayoutAnimation
    at android.view.animation.AnimationUtils.createAnimationFromXml(AnimationUtils.java:116)
    at android.view.animation.AnimationUtils.createAnimationFromXml(AnimationUtils.java:83)
    at android.view.animation.AnimationUtils.loadAnimation(AnimationUtils.java:64)
    at nick.kimK.ViewModel$1$1.run(ViewModel.java:72)
    at android.os.Handler.handleCallback(Handler.java:587)
    at android.os.Handler.dispatchMessage(Handler.java:92)
    at android.os.Looper.loop(Looper.java:123)
    at android.app.ActivityThread.main(ActivityThread.java:4627)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:521)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:871)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:629)
    at dalvik.system.NativeStart.main(Native Method)

UPD: Not every xml in res/anim folder declares an animation. Some of them might declare Animators or LayoutAnimationControllers. Those are not Animations, thus they can't be loaded with the loadAnimation() call.

It looks like the gridLayoutAnimation tag describes not a particular basic animation type but rather a GridLayoutAnimationController. So it can be loaded directly with AnimationUtils.loadAnimation() but rather should be set to a ViewGroup (a layout) throuh layoutAnimation property. If you still want to obtain the AnimationController instance in code, use AnimationUtils.loadLayoutAnimation() method:

LayoutAnimationController layoutAnimation = AnimationUtils.loadLayoutAnimation(ViewModel.this, R.anim.layout_grid_fade)

But you hardly can use the layoutAnimation in the way you're doing in your example. I found this article quite useful for understanding the layout animations.