wulkanowy-mod/app/src/main/res/layout/fragment_attendance_summary.xml

<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=".ui.modules.attendance.summary.AttendanceSummaryFragment">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <io.github.wulkanowy.ui.widgets.MaterialLinearLayout
            android:id="@+id/attendanceSummarySubjectsContainer"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="?android:windowBackground"
            android:padding="5dp"
            android:visibility="invisible"
            tools:ignore="UnusedAttribute"
            tools:listitem="@layout/item_attendance_summary"
            tools:visibility="visible">

            <Spinner
                android:id="@+id/attendanceSummarySubjects"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:ellipsize="middle"
                android:entries="@array/hosts_keys"
                android:paddingStart="10dp"
                android:paddingLeft="10dp"
                android:paddingTop="10dp"
                android:paddingEnd="30dp"
                android:paddingRight="30dp"
                android:paddingBottom="10dp"
                android:spinnerMode="dialog" />
        </io.github.wulkanowy.ui.widgets.MaterialLinearLayout>

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

            <androidx.recyclerview.widget.RecyclerView
                android:id="@+id/attendanceSummaryRecycler"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                tools:listitem="@layout/item_attendance_summary" />
        </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
    </LinearLayout>

    <me.zhanghai.android.materialprogressbar.MaterialProgressBar
        android:id="@+id/attendanceSummaryProgress"
        style="@style/Widget.MaterialProgressBar.ProgressBar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:indeterminate="true"
        tools:visibility="gone" />

    <LinearLayout
        android:id="@+id/attendanceSummaryEmpty"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:orientation="vertical"
        android:visibility="invisible"
        tools:ignore="UseCompoundDrawables">

        <ImageView
            android:layout_width="100dp"
            android:layout_height="100dp"
            app:srcCompat="@drawable/ic_main_attendance"
            app:tint="?colorOnBackground"
            tools:ignore="contentDescription" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="20dp"
            android:gravity="center"
            android:text="@string/attendance_no_items"
            android:textSize="20sp" />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/attendanceSummaryError"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:orientation="vertical"
        android:visibility="invisible"
        tools:ignore="UseCompoundDrawables"
        tools:visibility="invisible">

        <ImageView
            android:layout_width="100dp"
            android:layout_height="100dp"
            app:srcCompat="@drawable/ic_error"
            app:tint="?colorOnBackground"
            tools:ignore="contentDescription" />

        <TextView
            android:id="@+id/attendanceSummaryErrorMessage"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="20dp"
            android:gravity="center"
            android:padding="8dp"
            android:text="@string/error_unknown"
            android:textSize="20sp" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:gravity="center"
            android:orientation="horizontal">

            <com.google.android.material.button.MaterialButton
                android:id="@+id/attendanceSummaryErrorDetails"
                style="@style/Widget.MaterialComponents.Button.OutlinedButton"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginEnd="8dp"
                android:layout_marginRight="8dp"
                android:text="@string/all_details" />

            <com.google.android.material.button.MaterialButton
                android:id="@+id/attendanceSummaryErrorRetry"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/all_retry" />
        </LinearLayout>
    </LinearLayout>
</FrameLayout>