szkolnyplus/app/src/main/res/layout/grades_item_empty.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (c) Kuba Szczodrzyński 2020-3-1.
  -->

<layout xmlns:android="http://schemas.android.com/apk/res/android">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="8dp"
            android:gravity="center"
            android:textSize="18sp"
            android:textColor="?android:textColorSecondary"
            android:textStyle="italic"
            android:text="@string/grades_empty_text"/>
    </LinearLayout>
</layout>