cooleshow_android/live_teaching/src/main/res/anim/pop_exit_anim.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<!--    <translate-->
<!--        android:duration="200"-->
<!--        android:fromYDelta="0%"-->
<!--        android:toYDelta="0%" />-->
    <alpha
        android:duration="200"
        android:fromAlpha="1.0"
        android:toAlpha="0.0" />
</set>