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Removing the window's background can be achieved very easily by using a custom theme. To do so, first create a file called res/values/theme.xml containing the following:

<resources>    <style name="Theme.NoBackground" parent="android:Theme">        <item name="android:windowBackground">@null</item>    </style></resources>

You then need to apply the theme to your activity by adding the attribute android:theme="@style/Theme.NoBackground" to your <activity /> or <application /> tag. This trick comes in very handy for any app that uses a MapView, a WebView or any other full screen opaque view.

Droid-Fu offers both support classes meant to be used alongside existing Android code, as well as self-contained, ready-to-be-used components like new adapters and widgets. The areas tackled by Droid-Fu include: application life-cycle helpers support classes for handling Intents and diagnostics better support for background tasks super-easy and robust HTTP messaging powerful caching of Objects, HTTP responses, and remote images custom adapters and views I suggest you read this introductory article, and anything that follows.