xml:

<set xmlns:android="http://schemas.android.com/apk/res/android">

    <scale android:fromXScale="1.0" android:toXScale=".5"         android:fromYScale="1.0" android:toYScale=".5"         android:pivotX="50%p" android:pivotY="50%p"         android:duration="2000" /> </set>

Activity里的：

Animation animation = AnimationUtils.loadAnimation(MainActivity.this, R.anim.alphne);  mainTextView.startAnimation(animation); animation.setAnimationListener(new Animation.AnimationListener() {。。。。。。。}