ProjectLaogai/app/src/main/res/layout/fragment_mensa.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" xmlns:tools="http://schemas.android.com/tools"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             tools:context=".fragments.MensaFragment">

    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/refreshLayout_Mensa">

        <ScrollView
                android:layout_width="match_parent"
                android:layout_height="match_parent">
            <LinearLayout
                    android:orientation="vertical"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:animateLayoutChanges="false"
                    android:background="@color/themePrimary"
                    android:id="@+id/linLayout_Mensa"/>
        </ScrollView>
    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
    <com.google.android.material.floatingactionbutton.FloatingActionButton
            android:src="@drawable/ic_local_dining_black_24dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:clickable="true" android:id="@+id/btnCardValue" android:visibility="visible"
            android:layout_gravity="bottom|center|end" android:elevation="7dp" android:focusable="true"
            android:layout_marginEnd="7dp" android:layout_marginBottom="7dp"/>


</FrameLayout>