<?xml version="1.0" encoding="utf-8"?>
<!-- 淡入 -->
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/decelerate_interpolator">

    <alpha
        android:fromAlpha="0" android:toAlpha="1.0"
        android:duration="1"/>

</set>