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Android App Development (Kotlin) · Module 7 of 10

Coroutines and networking

Call APIs asynchronously with coroutines and Retrofit.

📖 Key ideas

  1. Coroutines run async work without blocking the main thread.
  2. suspend functions can pause and resume.
  3. Dispatchers: Main (UI), IO (network/disk), Default (CPU).
  4. Retrofit turns an HTTP API into a Kotlin interface.
  5. Parse JSON with kotlinx.serialization or Moshi.
💡 Real-life example: Coroutines are a waiter who takes your order and serves others while the kitchen cooks.
CoroutineLightweight async task
suspendFunction that can pause
Dispatchers.IOThread pool for I/O
RetrofitType-safe HTTP client