e-ntfy-android/app/src/main/res/layout/detail_activity.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".ui.DetailActivity">

    <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/detail_notification_list"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:clickable="true"
            android:focusable="true"
            android:layout_marginTop="10dp"
            android:background="?android:attr/selectableItemBackground"
            app:layoutManager="LinearLayoutManager" android:visibility="gone"/>

    <LinearLayout
            android:orientation="vertical"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/detail_no_notifications" app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintTop_toTopOf="parent" app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent">
        <ImageView
                android:layout_width="match_parent"
                android:layout_height="wrap_content" app:srcCompat="@drawable/ic_sms_gray_48dp"
                android:id="@+id/detail_no_notifications_image"/>
        <TextView
                android:id="@+id/detail_no_notifications_text"
                android:text="@string/detail_no_notifications_text"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="@style/TextAppearance.AppCompat.Medium"
                android:padding="10dp" android:gravity="center_horizontal"
                android:paddingStart="50dp" android:paddingEnd="50dp"/>
    </LinearLayout>

</androidx.constraintlayout.widget.ConstraintLayout>