[android-developers] Adapter fetches and parses RSS feed to get its data - best practice?

In a shared project, we have an Adapter class (extends BaseAdapter,
implements ListAdapter). In its constructor, this class fetches an RSS
feed from the internet and parses the returned XML document to obtain
the data it will 'adapt'; the data is kept in a private class
variable.

This is seen as the "Android way" of doing things by the author and is
supported by the project lead.
Can this be considered a "Best Practice"?
Can it be justified on the grounds that it (may?) increase
performance?
Doesn't it violate the general Object Oriented Design (OOD) principle
that a class should have only a "Single Responsiblity"?
Are best practices for OOD or Java to be set aside in Android
development?

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