How are apps launched on smartphones?

[AC Question]

I tried to search online a lot but I am not able to find anything that explains what happens when app icon is pressed. What happens next when app is launched? I am referring to source code and not any specific OS.

(I have also asked the same question on Quora but no answer yet )

 

[belodion]

Well, we have some geniuses of our own here. I'm not one of them, but I'll see if I can locate one.