AddMedicationScreen.kt

@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun RecurrenceDropdownMenu(recurrence: (String) -> Unit) {
    Column(
        verticalArrangement = Arrangement.spacedBy(8.dp)
    ) {
        Text(
            text = stringResource(id = R.string.recurrence),
            style = MaterialTheme.typography.bodyLarge
        )

        val options = getRecurrenceList().map { it.name }
        var expanded by remember { mutableStateOf(false) }
        var selectedOptionText by remember { mutableStateOf(options[0]) }
        ExposedDropdownMenuBox(
            expanded = expanded,
            onExpandedChange = { expanded = !expanded },
        ) {
            TextField(
                modifier = Modifier.menuAnchor(),
                readOnly = true,
                value = selectedOptionText,
                onValueChange = {},
                trailingIcon = { ExposedDropdownMenuDefaults.TrailingIcon(expanded = expanded) },
                colors = ExposedDropdownMenuDefaults.textFieldColors(),
            )
            ExposedDropdownMenu(
                expanded = expanded,
                onDismissRequest = { expanded = false },
            ) {
                options.forEach { selectionOption ->
                    DropdownMenuItem(
                        text = { Text(selectionOption) },
                        onClick = {
                            selectedOptionText = selectionOption
                            recurrence(selectionOption)
                            expanded = false
                        }
                    )
                }
            }
        }
    }
}