Add functionality to an android application without source codes. Is it possible to do this?

Question

Android

There is a client program for a taxi without source codes. Orders are received and selected manually. Is it possible to add a filter to the application by which a suitable order will be selected and the button to take the order will be automatically pressed?

Answer 1

There are a lot of decompilers in smali code - only knowledge is required to understand it.
Articles on the Internet are like dirt: https://xakep.ru/2013/10/22/modify-and-packing-and...
Only modern versions of Android will notice the forgery of the signature and will not let you install this application.