Android, no title bar, no status bar

** styles.xml
 

add <item name="windowNoTitle">true</item>

<resources>
   <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">

　　　　...

        <item name="windowNoTitle">true</item>

        //add this line

    </style>
</resources>

<item name="windowNoTitle">true</item>

-> no title bar only.

<item name="windowFullscreen">true</item>

-> no status bar.