Android Theme Without ActionBar

Add this to styles.xml

<resources>
    <!-- Base application theme. -->
    <style name="AppTheme" parent="android:Theme.Holo.Light.DarkActionBar">
        <!-- Customize your theme here. -->
    </style>

    <style name="NoActionBar" parent="AppTheme">
        <item name="android:windowActionBar">false</item>
        <item name="android:windowNoTitle">true</item>
    </style>
</resources>

Then add to the desired activity:

android:theme="@style/NoActionBar"