I use the android app editor pretty much exclusively. You might have to use another editor (i use one called Pocket Editor) to open your .agc files from ur device's storage. From there although its a hassel you can have the full suite of tools at ur disposal. Be sure to save it under the projects main.agc then u can reopen it with the agk android editor. Hope i knew what u were talking about
EDIT forgive me im an addict, what i meant to say was double tap and hold to highlight the text. Options to copy cut paste will appear above ur on screen keyboard somewhere