dialog_scale_in.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">

    <!--缩放淡入-->
    <scale
        android:duration="235"
        android:fromXScale="0.8"
        android:fromYScale="0.8"
        android:pivotX="50%p"
        android:pivotY="50%p"
        android:toXScale="1.0"
        android:toYScale="1.0"/>

    <alpha
        android:duration="235"
        android:fromAlpha="0.0"
        android:interpolator="@android:anim/accelerate_interpolator"
        android:toAlpha="1.0"/>
</set>