Accessibility announcement - Jetpack Compose

In Jetpack Compose, to notify Composable state changes, you can use the liveRegion property from semantics block modifier.

You can choose from two options for liveRegion:

1. LiveRegionMode.Polite , which waits for the speech announcement in progress to complete

2. LiveRegionMode.Assertive, which interrupts ongoing speech to immediately announce changes

If you don't specify the liveRegion property, it indicates to Compose that updates to this field would not be announced.

var changingText by remember{ mutableStateOf("Changing text") }
Text(
    text = changingText,
    modifier = Modifier.semantics {
        liveRegion = LiveRegionMode.Polite
        contentDescription = changingText // workaround for bug
    }
)

Important: there is a known issue with liveRegion, which prevents speech announcements when the text parameter is changed. The current workaround is to assign the same text to the contentDescription field.