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Junior — Middle

How to update the interface in Jetpack Compose after data changes?

sobes.tech AI

Answer from AI

In Jetpack Compose, interface updates occur automatically when data changes if that data is observable. This is achieved using states (State), which trigger a redraw of the relevant components upon modification.

Main methods of updating the UI:

  • Use mutableStateOf to create mutable state.
  • Wrap data in remember or rememberSaveable to preserve state.

Example:

@Composable
fun Counter() {
    var count by remember { mutableStateOf(0) }

    Button(onClick = { count++ }) {
        Text("Clicked $count times")
    }
}

Here, each button press changes the value of count, and Compose automatically updates the text on the screen.