Facilitates reactive state management and ViewModels with minimal boilerplate. Features include automatic recomputation, on-demand resource allocation, error handling, coroutine-based testing, lifecycle management, and state restoration.
Kotlin Multiplatform ViewModels and reactive state management based on StateFlow.
See the ReactiveState documentation for more details.
Map/transform a StateFlow:
val number = MutableStateFlow(0)
val doubledNumber: StateFlow<Int> = derived { 2 * get(number) }
Collect two StateFlows (just collect without transforming):
val base = MutableStateFlow(0)
val extra = MutableStateFlow(0)
autoRun {
if (get(base) + get(extra) > 10) {
alert("You're flying too high")
}
}
Multiplatform ViewModels with automatic error handling and loading indicator tracking:
class ExampleViewModel(scope: CoroutineScope, val repository: ExampleRepository) : ReactiveViewModel(scope) {
val inputFieldValue = MutableStateFlow("default")
fun submit() {
// The launch function automatically catches exceptions and increments/decrements the loading indicator.
// This way you can't forget the fundamentals that have to be always handled correctly.
launch {
repository.submit(inputFieldValue.value)
}
}
}
Intercept MutableStateFlow:
public val state: MutableStateFlow<String> = MutableStateFlow("value").afterUpdate {
// This is called every time after someone sets `state.value = ...`
}
Convert StateFlow to MutableStateFlow:
val readOnly: StateFlow<Int> = getSomeStateFlow()
val mutable: MutableStateFlow<Int> = readOnly.toMutable { value: Int ->
// This is executed whenever someone sets `mutable.value = ...`.
}
See the ReactiveState documentation for more details.
Add the package to your build.gradle.kts's dependencies {}:
dependencies {
// Add the BOM using the desired ReactiveState version
api(platform("com.ensody.reactivestate:reactivestate-bom:VERSION"))
// Leave out the version number from now on.
// Jetpack Compose integration
api("com.ensody.reactivestate:reactivestate-compose")
// Android-only integration for Activity/Fragment
api("com.ensody.reactivestate:reactivestate-android")
// UI-independent core APIs
api("com.ensody.reactivestate:reactivestate-core")
api()
api()
}
Also, make sure you've integrated the Maven Central repo, e.g. in your root build.gradle.kts:
subprojects {
repositories {
// ...
mavenCentral()
// ...
}
}
Copyright 2026 Ensody GmbH, Waldemar Kornewald
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance the License.
You may obtain a copy of the License at
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