How to track the execution of code in an android application?

Question

Java

Actually, I unpacked the .apk, decompiled the code, got the sorts, now my task is to get exactly the moment when, for example, the authorization key I need is generated.
Tell me, is it possible to sniff it somehow, say by code?

Answer 1

Em.
There is such a thing Log.d - the stage of program execution will be displayed in the console.
The most important thing is to label correctly.
On the startandroyd website it is written about this, 5 - 7 lesson.

Answer 2

Well, once you have enough skills to decompile, then it will not be difficult to trace the execution with your eyes through the code. :)