Need some way to expand an activity's functions, or relay them to a plugin.

There is already startActivityForResult, which helps me run onActivityResult.

I am having trouble integrating this: http://tinyurl.com/kptdph5
as a plugin, however. It calls for extending the main Activity to run the events, but as far as I know, only onActivityResult will forward back to a plugin.

Some ideas:
1) A pre-processing step that rewrites the main Activity and adds functions from a specific class into the Activity.
2) ???
3) PROFIT.