styles.xml

<resources>

    <!-- Base application theme. -->

    <style name="loading_dialog" parent="android:style/Theme.Dialog">
        <item name="android:windowFrame">@null</item>
        <item name="android:windowNoTitle">true</item>
        <item name="android:windowBackground">@color/loading_dialog_bg</item>
        <item name="android:windowIsFloating">true</item>
        <item name="android:windowContentOverlay">@null</item>
    </style>
    <style name="Dialog_No_Border">
        <item name="android:windowIsFloating">true</item>
        <item name="android:windowBackground">@android:color/transparent</item>
    </style>
</resources>