Android set style in xml

Setting the new style to activity, just add a new style in style.xml and use the style in activity or view.

// style.xml
<style name="HintFont" parent="android:Theme.Holo.Light.DarkActionBar">
     <item name="android:textColor">#BBBBBB</item>
     <item name="android:textSize">18dp</item>
</style>

//AndroidManifest.xml (whole activity)
<activity android:name="mainActivity" android:theme="@style/HintFont"></activity>

// layout.xml (singal view)
style="@style/HintFont"