Tween animation

【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