pickerview_dialog_scale_out.xml

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


  <alpha
      android:duration="@integer/animation_default_duration"
      android:fromAlpha="1.0"
      android:toAlpha="0.3" />

  <scale
      android:duration="@integer/animation_default_duration"
      android:fromXScale="1.0"
      android:toXScale="0.0"
      android:fromYScale="1.0"
      android:toYScale="0.0"
      android:pivotX="50%"
      android:pivotY="50%"/>
</set>