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