android-calculatorpp/android-app/res/layout/onscreen_layout.xml

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

<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
			  a:orientation="vertical"
			  style="@style/cpp_widget_main_layout_style">

	<include a:id="@+id/onscreen_header" layout="@layout/onscreen_header"/>

	<LinearLayout a:id="@+id/onscreen_content"
				  a:orientation="vertical"
				  a:layout_width="match_parent"
				  a:layout_height="match_parent">

		<include layout="@layout/onscreen_editor"
				 a:layout_width="match_parent"
				 a:layout_height="wrap_content"/>

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

			<include layout="@layout/widget_equals_button"
					 a:layout_margin="@dimen/cpp_button_margin"
					 a:layout_weight="1"
					 a:layout_width="0dp"
					 a:layout_height="match_parent"/>

			<include layout="@layout/onscreen_display"
					 a:layout_weight="4"
					 a:layout_width="0dp"
					 a:layout_height="wrap_content"/>

		</LinearLayout>

		<include layout="@layout/onscreen_keyboard"
				 a:layout_weight="4"
				 a:layout_width="match_parent"
				 a:layout_height="0dp"/>
	</LinearLayout>

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

</LinearLayout>