Composable-friendly retained models offering lifecycle-aware instances, coroutine-scoped cancellation, simple retain factory, and onClear hooks for deterministic resource cleanup and UI state retention.
A small helper for build retained model similar to android ViewModel.
libs.versions.toml
[versions]
retainedmodel = "1.0.0"
[dependencies]
retainedmodel = { group = "io.github.andannn", name = "retainedmodel", version.ref = "retainedmodel" }then
dependencies {
implementation(libs.retainedmodel)
}
@Composable
fun retainedCounterModel(): CounterModel =
retainRetainedModel {
CounterModel()
}
class CounterModel : RetainedModel() {
init {
retainedScope.launch {
// launch coroutine scoped by retainedScope which will be canceled when this model is retired.
}
}
override fun onClear() {
super.onClear()
// clear your resource..
}
}A small helper for build retained model similar to android ViewModel.
libs.versions.toml
[versions]
retainedmodel = "1.0.0"
[dependencies]
retainedmodel = { group = "io.github.andannn", name = "retainedmodel", version.ref = "retainedmodel" }then
dependencies {
implementation(libs.retainedmodel)
}
@Composable
fun retainedCounterModel(): CounterModel =
retainRetainedModel {
CounterModel()
}
class CounterModel : RetainedModel() {
init {
retainedScope.launch {
// launch coroutine scoped by retainedScope which will be canceled when this model is retired.
}
}
override fun onClear() {
super.onClear()
// clear your resource..
}
}