Build an extension system for my android application
<p>I'm trying to build an extension system 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. </p>

<p>Thanks </p>
