Concurrency with Coroutines in Android

Jun 5 2024 · Kotlin 1.9.23, Android 14, Android Studio Iguana

Lesson 05: Handle Errors

Demo

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Open the starter project in Android Studio. Go to the Lesson5Screen and look at the code. On top, you have the coroutine scope you will use in this lesson. Its context contains several elements.

coroutineScope.launch {
  Log.d(
    "Lesson5",
    "Coroutine inside launch on thread: ${Thread.currentThread().name}",
  )
  throw Exception("launch went wrong")
}

System.setProperty(DEBUG_PROPERTY_NAME, DEBUG_PROPERTY_VALUE_ON)

runBlocking {
  Log.d(
    "Lesson5",
    "Coroutine inside runBlocking on thread: ${Thread.currentThread().name}",
  )
  throw Exception("runBlocking went wrong")
}

coroutineScope.async {
  Log.d(
    "Lesson5",
    "Coroutine inside async on thread: ${Thread.currentThread().name}",
  )
  throw Exception("async went wrong")
}

coroutineScope.launch { throw Exception("Exception 1") }
coroutineScope.launch { throw Exception("Exception 2") }

coroutineScope.launch {
  launch {
    try {
      delay(Long.MAX_VALUE)
    } finally {
      throw IllegalArgumentException("Illegal argument exception")
    }
  }
  launch {
    delay(100)
    throw IOException("I/O exception")
  }
}
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