Build an extension system for my android application

I'm trying to build an extension sy开发者_开发技巧stem for my application, basically to add different protocols in it (facebook and twitter connection for example) and be able to configure them from my main application. I want it to be pretty similar to how dolphin browser extensions work. But I haven't any idea how to start it. Do anyone have any interesting links or suggestions about the conception and the technical part ? I don't know where to start.

Thanks

There are different options to do that :

• create an interface for the service you want to build, the abstraction of the expected behavior of your twitter/facebook connectors.
• provide a way to lazyly instanciate the implementation of your choice for this service.

It could be done through a factory design pattern, a bus design pattern could also do, or dependency injection with a xml config file.

Each one has its advantages and drawbacks, some are alternatives in some cases, you should definitely have a look at those design patterns.

Regards, Stéphane