Should a sync provider be an Android library or application?

Regarding Android >= 2.0.1.

This speaks for Application type of project:

• The provided sample code makes it an application.
• Easy testing in dev tools.

This speaks for Library type of project:

• From another app开发者_高级运维lication wanting to trigger a sync, I would like to include it as a library dependency.

What other benefits/drawbacks can you see with either type of project ?

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Make it work as a part of your Application first and (if necessary) refactor into a library later.