Keyboard does not hide, when focused TextField leaves the LazyColumn - android-jetpack-compose

Question

Perhaps this is the normal behaviour, but i wish it was different. I had tried to google the solution, but did not find anything suitable (or merely missed it).
Sample code (for simplicity i hold mutable states right here, not using ViewModel):
#Composable
fun Greeting() {
Scaffold(topBar = {
TopAppBar(title = { Text(text = "Some title") })
}) {
val focusManager = LocalFocusManager.current
LazyColumn(
contentPadding = PaddingValues(all = 16.dp),
verticalArrangement = Arrangement.spacedBy(space = 16.dp)
) {
items(count = 20) { index ->
val (value, onValueChange) = rememberSaveable { mutableStateOf("Some value $index") }
TextField(
value = value,
onValueChange = onValueChange,
modifier = Modifier.fillMaxWidth(),
label = { Text(text = "Some label $index") },
keyboardOptions = KeyboardOptions(imeAction = ImeAction.Next),
keyboardActions = KeyboardActions(onNext = {
if (!focusManager.moveFocus(FocusDirection.Down))
focusManager.clearFocus()
}),
singleLine = true
)
}
}
}
}
Compose version 1.0.5

Answer 1

You could try just hiding the keyboard whenever scrolling occurs. This is okay as long as you don't have a large set of items. But since you're using TextFields, it isn't likely that you'll have such a large number. This sample illustrates hiding the keyboard when scrolling occurs:
class MainActivity : ComponentActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
startActivity(intent)
setContent {
Greeting(this)
}
}
}
#Composable
fun Greeting(activity: Activity) {
Scaffold(topBar = {
TopAppBar(title = { Text(text = "Some title") })
}) {
val lazyListState = rememberLazyListState()
val ctx = LocalContext.current
LaunchedEffect(lazyListState.firstVisibleItemIndex) {
val inputMethodManager = ctx.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
inputMethodManager.hideSoftInputFromWindow(activity.window?.decorView?.windowToken, 0)
}
LazyColumn(
state = lazyListState,
contentPadding = PaddingValues(all = 16.dp),
verticalArrangement = Arrangement.spacedBy(space = 16.dp)
) {
items(
count = 20,
key = { index ->
// Return a stable + unique key for the item
index
}
) { index ->
val (value, onValueChange) = rememberSaveable { mutableStateOf("Some value $index") }
TextField(
value = value,
onValueChange = onValueChange,
modifier = Modifier
.fillMaxWidth(),
label = { Text(text = "Some label $index") },
singleLine = true
)
}
}
}
}