How would this be implemented? Perhaps a selection of 2 or 3 options? What does the WordPress module support? What do other implementations support.
Have you tried with the latest version from Google Play or GitHub releases. I don't have this problem. The exception throws because of a missing/not found authorization endpoint. Perhaps this occured because of a strange combination with #15.
Like/post button missing on Like Activity
The toolbar with the like button is missing on the like activity.
It is possible to create extra activities for "like", however I noticed that not all apps supports this. I think Twitter will only shows different apps, and not the specific actions.