If you want your style to be used as theme ,you have to put your style
in theme.xml not style.xml.This you can find developer's guide also.

On Oct 17, 6:30 pm, Amit <[email protected]> wrote:
> I have a PreferenceActivity which displays items in a list view. I
> applied theme as Theme.Dialog in AndroidManifest.xml and it looks like
> a dialog with black color background. To change the background I did
> the following changes:
>
> style.xml
>
> <style name="CustomTheme" parent="android:Theme.Dialog">
>         <item name="android:windowBackground">@color/bg_color</item>
>         <item name="android:colorBackground">@color/bg_color</item>
>  </style>
>
> color.xml
>
> <color name="bg_color">@android:color/white</color>
>
> AndroidManifest.xml
>
>  <activity android:name=".PrefActivity"
>                 android:theme="@style/CustomTheme"
>                 android:excludeFromRecents="true"
> </activity>
>
> Now, neither I see the screen as dialog(appears as full screen) nor
> the color as white. Please help me if I am missing something here. Or
> do we have a better alternative to change the color for the above
> mentioned scenario.

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