【Tween animation】
An animation defined in XML that performs transitions such as rotating, fading, moving, and stretching on a graphic.
res/anim/filename.xml
In Java: R.anim.filename
In XML: @[package:]anim/filename
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@[package:]anim/interpolator_resource"
android:shareInterpolator=["true" | "false"] >
<alpha
android:fromAlpha="float"
android:toAlpha="float" />
<scale
android:fromXScale="float"
android:toXScale="float"
android:fromYScale="float"
android:toYScale="float"
android:pivotX="float"
android:pivotY="float" />
<translate
android:fromXDelta="float"
android:toXDelta="float"
android:fromYDelta="float"
android:toYDelta="float" />
<rotate
android:fromDegrees="float"
android:toDegrees="float"
android:pivotX="float"
android:pivotY="float" />
<set>
...
</set>
</set>
The file must have a single root element: either an <alpha>, <scale>, <translate>, <rotate>, or<set> element that holds a group (or groups) of other animation elements (even nested <set>elements).
This application code will apply the animation to an ImageView and start the animation:
ImageView image = (ImageView) findViewById(R.id.image);
Animation hyperspaceJump = AnimationUtils.loadAnimation(this, R.anim.hyperspace_jump);
image.startAnimation(hyperspaceJump);
参考：http://android.xsoftlab.net/guide/topics/resources/animation-resource.html#Tween