Junior — Middle
What is the difference between the remember and rememberSavable functions in Jetpack Compose in the context of state management?
sobes.tech AI
Answer from AI
In Jetpack Compose, the functions remember and rememberSavable are used to preserve state across recompositions of composable functions, but they differ in how they save the state:
-
remembersaves the state only in memory during the current lifecycle of the composition. When the activity or process is recreated, the state will be lost. -
rememberSavablesaves the state in a way that it can be automatically saved and restored during activity recreation, such as during screen rotation. This uses theSavedInstanceStatemechanism.
Example:
var count by remember { mutableStateOf(0) } // state is not saved during activity recreation
var count by rememberSavable { mutableStateOf(0) } // state is saved and restored
Use rememberSavable if you want the state to be preserved during configuration changes.