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

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

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

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

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

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

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

            <include
                layout="@layout/cpp_simple_button_equals"
                a:layout_width="0dp"
                a:layout_height="match_parent"
                a:layout_weight="1" />

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

        </LinearLayout>

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

</LinearLayout>