INTRO

Uses some javascript regex to return the file or folder ID from the share link provided by google drive

BLOCKS

js as text:

var Url='https://docs.google.com/spreadsheets/d/1IdpGILdyyL50eo5la2xbDN1Cok/edit?usp=drive_link';

var id = Url.match(/[-\w]{25,}/);

window.AppInventor.setWebViewString(id.toString());

AIA and FILES

getGDIDJS.aia

ADDENDUM

Can also be done with the advanced list blocks: