Why is not possible for linear layout to have style attributes

I have defined a style for Linear layout but the layout is not visible in graphical view of main.xml

main.xml.

<LinearLayout style="VerticalThemeLayoutInputs">

styles.xml

<resources>
<style name="VerticalThemeLayoutInputs">
    <item name="android:background">#6699FF</item>
    <item name="android:layout_width">fill_parent</item>
    <item name="android:layout_height">fill_parent</item>

</style>
</resources>

Edit:

But below code will work fine but I don't want this code

<LinearLayout
android:background="#6699FF"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>

Interesting Fact

I used a scrollview. Within that I placed many Linear layout. Layouts properties are almost same so I decided to have a style for that. But what is happening know? the layout is not visible only in graphical-view but it works fine in emulator.

But actually what is happening? I think its due to Scroll view.