Embed custom view in android home screen widget

I am building a home screen widget and I want to add an advertisement to it. Currently the advertises SDK provides a custom view widget which I tried to e开发者_开发知识库mbed in my home screen widget. But when I add it, it says problem loading widget. I'm guessing I can't add custom views to a widget? Could someone clarify or tell me how I could add an advertisement to my home screen widget.

Thank you

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Home screen widgets support very limited number of standard widgets. You can't use custom widgets for them. See App Widgets.