android-calculatorpp/res/layout/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="match_parent"
			  a:layout_height="match_parent"
			  a:background="#ff000000">

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

		<LinearLayout a:layout_weight="2" a:layout_width="match_parent" a:layout_height="0dp">

			<EditText
					a:id="@+id/editText"
					style="@style/display_style"
					a:singleLine="false"/>

		</LinearLayout>

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


			<EditText
					a:id="@+id/resultEditText"
					style="@style/display_style"
					a:gravity="right|top"
					a:minLines="1"
					a:maxLines="1"
					a:scrollHorizontally="true"
					a:scrollbars="none"/>

		</LinearLayout>

		<LinearLayout a:layout_weight="1" a:layout_width="match_parent" a:layout_height="0dp">
			<org.solovyev.android.view.DirectionDragButton a:id="@+id/oneDigitButton" a:text="1" calc:textUp="sin"
														   calc:textDown="asin" style="@style/digitButtonStyle"
														   a:onClick="digitButtonClickHandler"/>

			<org.solovyev.android.view.DirectionDragButton a:id="@+id/twoDigitButton" a:text="2" calc:textUp="cos"
														   calc:textDown="acos" style="@style/digitButtonStyle"
														   a:onClick="digitButtonClickHandler"/>

			<org.solovyev.android.view.DirectionDragButton a:id="@+id/threeDigitButton" a:text="3" calc:textUp="tg"
														   calc:textDown="atg" style="@style/digitButtonStyle"
														   a:onClick="digitButtonClickHandler"/>

			<org.solovyev.android.view.DirectionDragButton a:id="@+id/muliplicationButton" a:text="*"
														   calc:textUp="^"
														   calc:textDown="^2" style="@style/digitButtonStyle"
														   a:onClick="digitButtonClickHandler"/>

		</LinearLayout>

		<LinearLayout a:layout_weight="1" a:layout_width="match_parent" a:layout_height="0dp">
			<org.solovyev.android.view.DirectionDragButton a:id="@+id/fourDigitButton"
														   a:text="4"
														   calc:textUp=""
														   calc:textDown=""
														   style="@style/digitButtonStyle"
														   a:onClick="digitButtonClickHandler"/>

			<org.solovyev.android.view.DirectionDragButton a:id="@+id/fiveDigitButton"
														   a:text="5"
														   calc:textUp="ln"
														   style="@style/digitButtonStyle"
														   a:onClick="digitButtonClickHandler"/>

			<org.solovyev.android.view.DirectionDragButton a:id="@+id/sixDigitButton" a:text="6"
														   calc:textUp=""
														   calc:textDown="" style="@style/digitButtonStyle"
														   a:onClick="digitButtonClickHandler"/>

			<org.solovyev.android.view.DirectionDragButton a:id="@+id/divisionButton" a:text="/"
														   calc:textUp="√"
														   style="@style/digitButtonStyle"
														   a:onClick="digitButtonClickHandler"/>

		</LinearLayout>

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

			<org.solovyev.android.view.DirectionDragButton a:id="@+id/sevenDigitButton" a:text="7" calc:textUp=""
														   calc:textDown="" style="@style/digitButtonStyle"
														   a:onClick="digitButtonClickHandler"/>

			<org.solovyev.android.view.DirectionDragButton a:id="@+id/eigthDigitButton" a:text="8" calc:textUp=""
														   calc:textDown="" style="@style/digitButtonStyle"
														   a:onClick="digitButtonClickHandler"/>

			<org.solovyev.android.view.DirectionDragButton a:id="@+id/nineDigitButton" a:text="9"
														   calc:textDown="e"
														   calc:textUp="π"
														   style="@style/digitButtonStyle"
														   a:onClick="digitButtonClickHandler"/>

			<org.solovyev.android.view.DirectionDragButton a:id="@+id/plusButton" a:text="+"
														   style="@style/digitButtonStyle"
														   a:onClick="digitButtonClickHandler"/>


		</LinearLayout>

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

			<org.solovyev.android.view.DirectionDragButton a:id="@+id/roundBracketsButton" a:text="()"
														   calc:textUp="("
														   calc:textDown=")" style="@style/digitButtonStyle"
														   a:onClick="digitButtonClickHandler"/>

			<org.solovyev.android.view.DirectionDragButton a:id="@+id/zeroDigitButton" a:text="0"
														   calc:textUp="."
														   calc:textDown=","
														   style="@style/digitButtonStyle"
														   a:onClick="digitButtonClickHandler"/>


			<org.solovyev.android.view.DirectionDragButton a:id="@+id/squareBracketsButton" a:text="[]"
														   calc:textUp="["
														   calc:textDown="]" style="@style/digitButtonStyle"
														   a:onClick="digitButtonClickHandler"/>

			<org.solovyev.android.view.DirectionDragButton a:id="@+id/subtractionButton" a:text="-"
														   calc:textUp="{"
														   calc:textDown="}"
														   style="@style/digitButtonStyle"
														   a:onClick="digitButtonClickHandler"/>


		</LinearLayout>


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


			<org.solovyev.android.view.DirectionDragButton a:id="@+id/equalsButton"
														   a:text="="
														   a:layout_width="fill_parent"
														   style="@style/controlButtonStyle"
														   a:onClick="numericButtonClickHandler"/>


			<!--				<org.solovyev.android.view.DirectionDragButton a:id="@+id/numericButton" a:text="numeric"
																						   style="@style/digitButtonStyle"
																						   a:onClick="numericButtonClickHandler"/>

											<org.solovyev.android.view.DirectionDragButton a:id="@+id/simplifyButton" a:text="simplify"
																						   style="@style/digitButtonStyle"
																						   a:onClick="simplifyButtonClickHandler"/>-->
			<org.solovyev.android.view.DirectionDragButton a:id="@+id/eraseButton"
														   a:text="↚"
														   style="@style/controlButtonStyle"
														   a:onClick="eraseButtonClickHandler"/>

			<org.solovyev.android.view.DirectionDragButton a:id="@+id/leftButton"
														   a:text="←"
														   style="@style/controlButtonStyle"
														   a:onClick="moveLeftButtonClickHandler"/>

			<org.solovyev.android.view.DirectionDragButton a:id="@+id/rightButton"
														   a:text="→"
														   style="@style/controlButtonStyle"
														   a:onClick="moveRightButtonClickHandler"/>

			<org.solovyev.android.view.DirectionDragButton a:id="@+id/historyButton"
														   a:text="clear"
														   calc:textUp="undo"
														   calc:textDown="redo"
														   style="@style/controlButtonStyle"
														   a:onClick="clearButtonClickHandler"/>

		</LinearLayout>
	</LinearLayout>
</LinearLayout>