Coroutines so Kotlinova rešitev za asinkrono programiranje — pisanje async kode (omrežni klici, operacije podatkovne baze), ki se bere zaporedno brez blokade glavne niti. Gre za sodoben, priporočeni način obravnave async dela v Androidu, ki se izogne zakoličenosti callback-ov.
Zakaj je asinkrono programiranje pomembno v Androidu
The MAIN (UI) thread must stay responsive — blocking it (with network/DB work) freezes
the UI (ANR "Application Not Responding" errors):
→ long operations MUST run off the main thread (asynchronously)
→ old approaches: callbacks (nested, complex), threads/AsyncTask (verbose, error-prone)
→ COROUTINES make async code clean and sequential.
