FairEmail/app/src/main/res/layout/item_image.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/clItem"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="?attr/activatableItemBackground"
        android:foreground="?attr/selectableItemBackground"
        android:padding="6dp">

        <ImageView
            android:id="@+id/ivImage"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:adjustViewBounds="true"
            android:contentDescription="@null"
            android:scaleType="centerInside"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:srcCompat="@mipmap/ic_launcher" />

        <eu.faircode.email.FixedTextView
            android:id="@+id/tvCaption"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:gravity="center_horizontal"
            android:text="@string/app_name"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/ivImage" />
    </androidx.constraintlayout.widget.ConstraintLayout>
</FrameLayout>