<?xml version="1.0" encoding="UTF-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <alpha
        android:fromAlpha="0.0"
        android:toAlpha="1.0"
        android:interpolator="@android:anim/accelerate_interpolator"
        android:duration="2000"/>
</set>


ImageView wi_background = findViewById(R.id.wi_bg);
                Animation myFadeInAnimation = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.fade_in_long);
                wi_background.setImageBitmap(blurredBitmap);
                wi_background.startAnimation(myFadeInAnimation);