How do I call a suspend function (network call) wh...

# android

[Lee Delarm]

How do I call a suspend function (network call) when initializing my main activity? This is what I've got (from the tutorial) and it shows a blank page. I've even tried changing the return from the function to a simple string instead of making a call and get the same. There's no build or runtime red errors

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            MyApplicationTheme {
                Surface(
                    modifier = Modifier.fillMaxSize(),
                    color = MaterialTheme.colors.background
                ) {
                    val scope = rememberCoroutineScope()
                    var text by remember { mutableStateOf("Loading") }
                    LaunchedEffect(true) {
                        scope.launch {
                            text = try {
                                Greeting().greeting()
                            } catch (e: Exception) {
                                e.localizedMessage ?: "error"
                            }
                        }
                    }
                    Greeting(text)
                }
            }
        }
    }
}

[zsmb]

LaunchedEffect already starts a coroutine for you, so you shouldn't need to create a scope and use launch. Just make your suspending calls within the suspending function that you're passing to LaunchedEffect.

[Lee Delarm]

I am, I'm narrowing the issue down to the API call made, as I've fixed the suspend issue using a lifecycle coroutine to make absolutely sure the problem isn't elsewhere. If this piece of code runs, no result will appear. I can use a delay(3000) in its place and it WILL run then. So I'm guessing I messed up using Ktro somehow

val rockets: List<RocketLaunch> =
            httpClient.get("<https://api.spacexdata.com/v4/launches>").body()
        val lastSuccessLaunch = rockets.last { it.launchSuccess == true }

[Lee Delarm]

It's really odd, it just suddenly started to work after removing and adding those lines and a few restarts. Maybe the emulator or gradle didn't build something right? Very strange, maybe it will even work with the original code now!

[Lee Delarm]

Ok, SOMETIMES the network call works and sometimes it fails silently. This is so weird