Basic use of lifecycle functions #152

joejackson3 · 2024-02-13T18:22:56Z

joejackson3
Feb 13, 2024

This is a very promising library. So far, I haven't been able to figure out how to use it for my Kotlin Multiplatform project.
My only real requirement is to run a OnResume function to update my main activity, when it is brought back into focus from background.

I am not clear where to instantiate the functions:

val lifecycleRegistry = LifecycleRegistry()
val someLogic = SomeLogic(lifecycleRegistry)

Do I need to call lifecycleRegistry.subscribe() from the Composable of the activity in question?

What I'm currently doing in my main module is define the SomeLogic class:

class SomeLogic(lifecycle: Lifecycle,t:MutableState<String>) {
    init {
        lifecycle.subscribe(
            onResume = {t.value="Res1"}
        )
        lifecycle.doOnResume {
             t.value = "Res";
        }
    }
}

then instantiate the members in the Composable of the main activity:
The OnResume function is however never called.

val lifecycleRegistry = LifecycleRegistry()
val someLogic = SomeLogic(lifecycleRegistry,t3)
lifecycleRegistry.subscribe()
lifecycleRegistry.doOnCreate { t3.value="yo" }

The OnResume function is however never called.
Any advice or reference to sample projects would be highly appreciated.

arkivanov · 2024-02-13T19:03:50Z

arkivanov
Feb 13, 2024
Maintainer

For Android, you can use one of the Android extensions provided by Essenty (as mentioned in the readme). For example, you can do the following in Activity.

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        val lifecycle = essentyLifecycle()
        val someLogic = SomeLogic(lifecycle = lifecycle)
    }
}