privacy-friendly-sudoku-fork/app/src/main/res/layout-land/activity_main_menu.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
    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:fitsSystemWindows="true"
    tools:context="tu_darmstadt.sudoku.ui.MainActivity"
    android:layout_height="match_parent"
    android:layout_width="match_parent">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/appbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
             android:id="@+id/toolbar"
             android:layout_width="match_parent"
             android:layout_height="?attr/actionBarSize"
             android:background="?attr/colorPrimary"
             app:popupTheme="@style/AppTheme.PopupOverlay">

        </android.support.v7.widget.Toolbar>


    </android.support.design.widget.AppBarLayout>

    <android.support.v4.widget.DrawerLayout
        android:id="@+id/drawer_layout_main"
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        android:layout_marginTop="?attr/actionBarSize"
        android:fitsSystemWindows="true"
        tools:openDrawer="start">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:weightSum="2"
            android:orientation="horizontal">

            <RelativeLayout
                android:layout_width="0px"
                android:layout_height="match_parent"
                android:layout_weight="1">

                <android.support.v4.view.ViewPager
                    android:id="@+id/scroller"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    app:layout_behavior="@string/appbar_scrolling_view_behavior" />

                <ImageView
                    android:id="@+id/arrow_left"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:src="@drawable/ic_keyboard_arrow_left_black_24dp"
                    android:layout_alignParentLeft="true"
                    android:layout_alignParentStart="true"
                    android:padding="@dimen/activity_horizontal_margin"
                    android:layout_marginStart="@dimen/activity_horizontal_margin"
                    android:layout_marginLeft="@dimen/activity_horizontal_margin"
                    android:layout_centerVertical="true"
                    android:onClick="onClick"/>
                <ImageView
                    android:id="@+id/arrow_right"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:padding="@dimen/activity_horizontal_margin"
                    android:src="@drawable/ic_keyboard_arrow_right_black_24dp"
                    android:layout_alignParentRight="true"
                    android:layout_alignParentEnd="true"
                    android:layout_marginEnd="@dimen/activity_horizontal_margin"
                    android:layout_marginRight="@dimen/activity_horizontal_margin"
                    android:layout_centerVertical="true"
                    android:onClick="onClick"/>
            </RelativeLayout>

            <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:tools="http://schemas.android.com/tools"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_below="@+id/scroller"
                android:layout_weight="1"
                android:paddingLeft="@dimen/activity_horizontal_margin"
                android:paddingRight="@dimen/activity_horizontal_margin"
                android:paddingTop="@dimen/activity_vertical_margin"
                android:paddingBottom="@dimen/activity_vertical_margin"
                tools:context="tu_darmstadt.sudoku.ui.MainActivity"
                android:orientation="vertical"
                android:weightSum="0"
                android:divider="#000"
                android:baselineAligned="false"
                android:gravity="center_horizontal">

                <TextView
                    android:id="@+id/difficultyText"
                    android:layout_marginTop="@dimen/activity_vertical_margin"
                    android:layout_height="wrap_content"
                    android:layout_width="wrap_content"
                    android:text="@string/difficulty_easy"
                    android:textSize="@dimen/main_text_difficulty"/>

                <RatingBar
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="@dimen/activity_vertical_margin"
                    android:id="@+id/difficultyBar"
                    android:layout_gravity="center_horizontal"
                    android:clickable="true"
                    android:numStars="4"
                    android:rating="1"
                    android:stepSize="1"/>

                <Button
                    android:textColor="@color/white"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="20dp"
                    android:layout_marginLeft="40dp"
                    android:layout_marginRight="40dp"
                    android:text="@string/new_game"
                    android:textStyle="normal"
                    android:textSize="@dimen/text_size"
                    android:id="@+id/playButton"
                    android:layout_gravity="center_horizontal"
                    android:onClick="onClick"
                    android:capitalize="none"
                    android:clickable="false"
                    android:elevation="10dp"
                    android:background="@drawable/standalone_button"/>

                <Button
                    android:textColor="@color/white"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="@dimen/activity_vertical_margin"
                    android:layout_marginLeft="40dp"
                    android:layout_marginRight="40dp"
                    android:text="@string/menu_continue_game"
                    android:textStyle="normal"
                    android:textSize="@dimen/text_size"
                    android:id="@+id/continueButton"
                    android:layout_gravity="center_horizontal"
                    android:onClick="onClick"
                    android:capitalize="none"
                    android:clickable="true"
                    android:background="@drawable/standalone_button"/>

        </LinearLayout>

   </LinearLayout>

    <android.support.design.widget.NavigationView
        android:id="@+id/nav_view_main"
        android:layout_width="200dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:background="@color/white"
        app:menu="@menu/menu_drawer_main"/>

    </android.support.v4.widget.DrawerLayout>

</android.support.design.widget.CoordinatorLayout>