Onscreen calculator now supports themes

android-app/src/main/res/layout/onscreen_header_material.xml

@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<RelativeLayout xmlns:a="http://schemas.android.com/apk/res/android"
+				a:layout_width="match_parent"
+				a:layout_height="30dp">
+
+	<LinearLayout
+		a:id="@+id/onscreen_header_buttons"
+		a:layout_width="wrap_content"
+		a:layout_height="match_parent"
+		a:layout_alignParentRight="true">
+
+		<ImageButton
+			a:id="@+id/onscreen_fold_button"
+			style="@style/CppHeaderButton.Material"
+			a:src="@drawable/cpp_onscreen_button_fold"/>
+
+		<ImageButton
+			a:id="@+id/onscreen_minimize_button"
+			style="@style/CppHeaderButton.Material"
+			a:src="@drawable/cpp_onscreen_button_minimize"/>
+
+		<ImageButton
+			a:id="@+id/onscreen_close_button"
+			style="@style/CppHeaderButton.Material"
+			a:src="@drawable/cpp_onscreen_button_close"/>
+
+	</LinearLayout>
+
+	<ImageView
+		a:id="@+id/onscreen_title"
+		a:layout_width="match_parent"
+		a:layout_height="match_parent"
+		a:layout_toLeftOf="@id/onscreen_header_buttons"
+		a:paddingBottom="2dp"
+		a:paddingLeft="6dp"
+		a:paddingTop="2dp"
+		a:scaleType="fitStart"
+		a:src="@drawable/cpp_onscreen_header_logo"/>
+
+</RelativeLayout>