android-calculatorpp/android-app-onscreen/res/layout/onscreen_keyboard.xml

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

<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
              a:layout_width="match_parent"
              a:layout_height="match_parent"
              a:orientation="vertical">

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

        <include layout="@layout/cpp_simple_button_7"/>
        <include layout="@layout/cpp_simple_button_8"/>
        <include layout="@layout/cpp_simple_button_9"/>
        <include layout="@layout/cpp_simple_button_multiplication"/>
		<include layout="@layout/cpp_simple_button_erase"/>

    </LinearLayout>

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

        <include layout="@layout/cpp_simple_button_4"/>
        <include layout="@layout/cpp_simple_button_5"/>
        <include layout="@layout/cpp_simple_button_6"/>
        <include layout="@layout/cpp_simple_button_division"/>
		<include layout="@layout/cpp_simple_button_percent"/>

	</LinearLayout>

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

        <include layout="@layout/cpp_simple_button_1"/>
        <include layout="@layout/cpp_simple_button_2"/>
        <include layout="@layout/cpp_simple_button_3"/>
        <include layout="@layout/cpp_simple_button_plus"/>
		<include layout="@layout/cpp_simple_button_power"/>
    </LinearLayout>

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

        <include layout="@layout/cpp_simple_button_round_brackets"/>
        <include layout="@layout/cpp_simple_button_0"/>
        <include layout="@layout/cpp_simple_button_dot"/>
        <include layout="@layout/cpp_simple_button_subtraction"/>
		<include layout="@layout/cpp_simple_button_app"/>

	</LinearLayout>


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

        <include layout="@layout/widget_left_button"/>
        <include layout="@layout/widget_right_button"/>
        <include layout="@layout/widget_vars_button"/>
        <include layout="@layout/widget_functions_button"/>
        <include layout="@layout/widget_app_button"/>
        <include layout="@layout/widget_history_button"/>

    </LinearLayout>-->

</LinearLayout>