Signal-Android/app/src/main/res/layout/stories_shared_element_crossfader.xml

<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    tools:viewBindingIgnore="true"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:clipChildren="false"
    android:clipToPadding="false"
    tools:parentTag="com.google.android.material.card.MaterialCardView">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <ImageView
            android:id="@+id/source_image_blur"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:importantForAccessibility="no"
            app:layout_constraintDimensionRatio="48:72"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent" />

        <ImageView
            android:id="@+id/source_image"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:importantForAccessibility="no"
            app:layout_constraintDimensionRatio="48:72"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent" />

        <ImageView
            android:id="@+id/target_image_blur"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:alpha="0"
            android:importantForAccessibility="no" />

        <ImageView
            android:id="@+id/target_image"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:alpha="0"
            android:importantForAccessibility="no" />

    </androidx.constraintlayout.widget.ConstraintLayout>
</merge>