<?xml version="1.0" encoding="utf-8"?>
<!-- 左上角扩大-->
  <scale   xmlns:android="http://schemas.android.com/apk/res/android"
        android:interpolator="@android:anim/accelerate_decelerate_interpolator"  
        android:fromXScale="0.001"   
        android:toXScale="1.0"   
        android:fromYScale="0.001"   
        android:toYScale="1.0"   
        android:pivotX="15%"  
        android:pivotY="25%"  
        android:duration="200" />  
   