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

    <!-- duration is the time for which animation will work-->
    <alpha
        android:duration="1000"
        android:fromAlpha="0"
        android:toAlpha="1" />

    <alpha
        android:duration="1000"
        android:fromAlpha="1"
        android:startOffset="2000"
        android:toAlpha="0" />

</set>