Android - Changes in “Style.xml” for Listview font-size

I have defined style for "TabWidget" as below:

<style name="MyTheme" parent="@android:style/Theme.Light">
        <item name="android:tabWidgetStyle">@style/LightTabWidget</item>
</style>

<style name="LightTabWidget" parent="@android:style/Widget.TabWidget">
            <item name="android:textSize">12px</item>
</style>

In which i am setting font-size 12px for TabWidget Indicator(title) font.

Now, my problem: Same way of Tabwidget style modification, i want to modify style for Listview for incresing/decreasing font-size. I know we can modify font-size of listview by defining custom-layout for Listview. But if there is a way to do by styles.xml then pls help me and let me know.