onKeyEvent

Compose Modifier

Common

fun Modifier.onKeyEvent(onKeyEvent: (KeyEvent) -> Boolean): Modifier

Adding this modifier to the modifier parameter of a component will allow it to intercept hardware key events when it (or one of its children) is focused.

Parameters


onKeyEvent	This callback is invoked when the user interacts with the hardware keyboard. While implementing this callback, return true to stop propagation of this event. If you return false, the key event will be sent to this `onKeyEvent`'s parent.

Code Examples

KeyEventSample

@Suppress("UNUSED_ANONYMOUS_PARAMETER")
@Composable
fun KeyEventSample() {
    // When the inner Box is focused, and the user presses a key, the key goes down the hierarchy
    // and then back up to the parent. At any stage you can stop the propagation by returning
    // true to indicate that you consumed the event.
    Box(Modifier.onPreviewKeyEvent { keyEvent1 -> false }.onKeyEvent { keyEvent4 -> false }) {
        Box(
            Modifier.onPreviewKeyEvent { keyEvent2 -> false }
                .onKeyEvent { keyEvent3 -> false }
                .focusable()
        )
    }
}