crystal-wallet-android/app/src/main/res/anim/fade_in.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/linear_interpolator">
    <alpha
        android:fromAlpha="0.1"
        android:toAlpha="1.0"
        android:duration="333"
        />
</set>