android-calculatorpp/res/layout-land/main.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
			  xmlns:calc="http://schemas.android.com/apk/res/org.solovyev.android.calculator"
			  a:orientation="vertical"
			  a:layout_width="fill_parent"
			  a:layout_height="fill_parent"
			  a:background="#ff000000">

	<LinearLayout
			a:layout_width="fill_parent"
			a:layout_height="fill_parent"
			a:orientation="vertical"
			a:layout_gravity="center">

		<include layout="@layout/calc_editor"/>

		<LinearLayout a:layout_weight="1" a:layout_width="fill_parent" a:layout_height="0dp">

			<org.solovyev.android.view.widgets.DirectionDragButton xmlns:a="http://schemas.android.com/apk/res/android"
																   xmlns:calc="http://schemas.android.com/apk/res/org.solovyev.android.calculator"
																   a:id="@+id/leftButton"
																   calc:textUp="◀◀"
																   a:text="◀"
																   calc:directionTextScale="0.5"
																   style="?controlButtonStyle"
																   a:onClick="moveLeftButtonClickHandler"
																   a:layout_width="fill_parent"
																   a:layout_height="fill_parent"
																   a:layout_weight="1.5"/>


			<org.solovyev.android.view.widgets.ColorButton xmlns:a="http://schemas.android.com/apk/res/android"
														   xmlns:calc="http://schemas.android.com/apk/res/org.solovyev.android.calculator"
														   a:id="@+id/eraseButton"
														   a:drawableTop="@drawable/sym_keyboard_delete"
														   style="?controlImageButtonStyle"
														   a:onClick="eraseButtonClickHandler"
														   a:layout_width="fill_parent"
														   a:layout_height="fill_parent"
														   a:layout_weight="1.5"/>


			<include layout="@layout/calc_display"
					 a:layout_width="fill_parent"
					 a:layout_height="fill_parent"
					 a:layout_weight="1"/>

			<org.solovyev.android.view.widgets.ColorButton xmlns:a="http://schemas.android.com/apk/res/android"
														   xmlns:calc="http://schemas.android.com/apk/res/org.solovyev.android.calculator"
														   a:id="@+id/clearButton"
														   a:text="@string/c_clear"
														   a:textStyle="bold"
														   style="?controlImageButtonStyle"
														   a:onClick="clearButtonClickHandler"
														   a:layout_width="fill_parent"
														   a:layout_height="fill_parent"
														   a:layout_weight="1.5"/>

			<org.solovyev.android.view.widgets.DirectionDragButton xmlns:a="http://schemas.android.com/apk/res/android"
																   xmlns:calc="http://schemas.android.com/apk/res/org.solovyev.android.calculator"
																   a:id="@+id/rightButton"
																   calc:textUp="▶▶"
																   a:text="▶"
																   calc:directionTextScale="0.5"
																   style="?controlButtonStyle"
																   a:onClick="moveRightButtonClickHandler"
																   a:layout_width="fill_parent"
																   a:layout_height="fill_parent"
																   a:layout_weight="1.5"/>

		</LinearLayout>

		<LinearLayout a:layout_weight="1" a:layout_width="fill_parent" a:layout_height="0dp">

			<include layout="@layout/calc_history_button"/>
			<include layout="@layout/calc_paste_button"/>
			<include layout="@layout/calc_one_digit_button"/>
			<include layout="@layout/calc_two_digit_button"/>
			<include layout="@layout/calc_three_digit_button"/>
			<include layout="@layout/calc_multiplication_button"/>
			<include layout="@layout/calc_division_button"/>

		</LinearLayout>

		<LinearLayout a:layout_weight="1" a:layout_width="fill_parent" a:layout_height="0dp">

			<include layout="@layout/calc_vars_button"/>
			<include layout="@layout/calc_copy_button"/>
			<include layout="@layout/calc_four_digit_button"/>
			<include layout="@layout/calc_five_digit_button"/>
			<include layout="@layout/calc_six_digit_button"/>
			<include layout="@layout/calc_plus_button"/>
			<include layout="@layout/calc_subtraction_button"/>

		</LinearLayout>

		<LinearLayout a:layout_weight="1" a:layout_width="fill_parent" a:layout_height="0dp">

			<include layout="@layout/calc_donate_button"/>
			<include layout="@layout/calc_square_brackets_button"/>
			<include layout="@layout/calc_seven_digit_button"/>
			<include layout="@layout/calc_eight_digit_button"/>
			<include layout="@layout/calc_nine_digit_button"/>
			<include layout="@layout/calc_zero_digit_button"/>
			<include layout="@layout/calc_round_brackets_button"/>


		</LinearLayout>

	</LinearLayout>
</LinearLayout>