<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
    <scale
    android:duration = "400"
    android:fromXScale="0.1"
    android:toXScale="1.0"
    android:fromYScale="0.1"
    android:toYScale="1.0"
    android:pivotX="50%"
    android:pivotY="50%"/>

    <alpha
        android:duration="300"
        android:fromAlpha="0.0"
        android:toAlpha="1.0" />
</set >