Hi, why can't we create Composable with lambda references I mean

::MyComponent

, I tried to use it in

myArray.forEach(::MyComponent)

but it throws an error 🤔

Bit of an architecture question if anybody has a sec? I have some temporary state which should be shared between (and updated by) two distinct screens. It’s not a repository level thing as its just some temporary state. Trying to find the best way to get this state into the relevant screen view model. Explored options in thread

If Compose is not able to infer the stability of a type, annotate the type with

@Stable

to allow Compose to favor smart recompositions.

How do we know that compose is able (or not able) to infer the stability of a type?

Is there any manager or LocalProvider to control ModalBottomSheet? I have a

HorizontalPager

which has 3 pages, if I use a ModalBottomSheet in 3rd page & show it, I can still scroll to other pages even though the BottomSheet is visible, which is not the behaviour when using layouts

Hello! I am a hobbyist trying to learn Android programming with Kotlin. I am trying to learn Jetpack Compose by making toy projects. I am currently working on an app that displays XKCD comics complete with double-tap to zoom, pinch, pan and fling gestures. To achieve this, I am currently using two pointerInput with different keys, one to detect double taps using detectTapGestures, and another to detect pans/drags using detectDragGestures. Finally, I am using transformable to detect multi-finger gestures like pinch-zoom. This setup works, but I am not sure that if this is the best way to go about it. I have a number of questions on this: Is it okay to use multiple pointerInput on the same widget? Does it impact performance in any way? What exactly is the role of key1 argument of pointerInput? Should they be different for different pointerInput? It seems that I can't use more than one gesture detectors within the same pointerInput scope, as the first one seems to "consume" the event. Is there any way to prevent this, or is this by design? I can't find many resources on Google where multiple gestures are implemented on the same object.

does

TextField

expose anything related to focus? In other words, how can one be notified of something like

isFocused

?

Hey everyone, how do I send a one-time event from the viewmodel to the composable? I want to navigate after a long operation

Is there any reason that I’m not seeing the Compose’s toolbar? There used to be multiple buttons for changing themes and deploying a certain preview, but currently there are only 3 buttons: Refresh, Switch Layout and Select Design Surface

When building a purely compose application, where do I out the logic for "if user is logged out, go to LoggedOutScreenComposable". Currently I'm passing shared prefs into my main App composable and doing the check there but that seems wrong, although it works.

Hey Composers! Is it possible to have 3d rotations in Compose animations? The typical roll-type one-dimensional rotation does not seem to be enough in creating some animations. Does Compose support rotation around X, and Z axes in addition to the Y axis which is already in place?

Hi folks! I need to set priority (content resistance) to item in

Row

but cannot figure out how to do it. For sample I have few texts in Row, but I need truncate the first one for sample, not the last

weight

isn’t correct way to do it Thanks

Hi! Is it possible u sing

LazyColumn

to have

stickyHeader

that overlaps the first item of

items

?

Hi, is there a way to paint an ImageVector into a canvas or more generally a Painter? Or maybe a way to convert an ImageVector to an ImageBitmap ?

I don’t know much about accessibility, screen readers and related matter, but I wonder what is the proper way to make a checkbox with text accessible? Material component has

Checkbox

but it doesn’t have a label. Of course, I can make a

Row

with checkbox and text, but they won’t be semantically connected (and I need special handling for label tap to toggle checkbox). What is the proper way of making labeled checkbox with accessibility in mind?

I have been using LazyColumn to load list of items with paging-compose library Here is the code

@Composable
fun ListOfItems(pagedItems: Flow<PagingData<Item>>) {
    val items: LazyPagingItems<Item> = pagedItems.collectAsLazyPagingItems()

    LazyColumn {
        items(items) { item ->
            ItemCard(item)
        }
    }
}

Problem is scrolled state is not retained when the screen is rotated Tried with the following

val listState: LazyListState = rememberSaveable(saver = LazyListState.Saver) { LazyListState() }
val scrollState: ScrollState = rememberSaveable(saver = ScrollState.Saver) { ScrollState(0) }

LazyColumn(
    modifier = Modifier
        .scrollable(scrollState, Orientation.Vertical),
    state = listState,
) {}

Still got no luck

Randomly hitting this today:

IllegalStateException: Couldn't obtain compiled function body for IrBasedSimpleFunctionDescriptor: FUN FUNCTION_FOR_DEFAULT_PARAMETER name:Column$default visibility:public modality:FINAL <> (modifier:androidx.compose.ui.Modifier?, verticalArrangement:androidx.compose.foundation.layout.Arrangement.Vertical?, horizontalAlignment:androidx.compose.ui.Alignment.Horizontal?, content:@[Composable] @[ExtensionFunctionType] kotlin.Function1<androidx.compose.foundation.layout.ColumnScope, kotlin.Unit>, $mask0:<http://kotlin.Int|kotlin.Int>, $handler:kotlin.Any?) returnType:kotlin.Unit [inline]

is anyone aware of some sample code for the button animation featured here: https://material.io/blog/jetpack-compose-beta. I am talking about the top left one.

Getting this error:

java.lang.IllegalArgumentException: navigation destination -2074115716 is not a direct child of this NavGraph

Simple repro code in thread

Hey guys. Have a few more questions on compose navigation. Im using the navigation component. How are you guys handling global states like logged in and logged out? Before I was handling like the following

class MyAppModel: ViewModel{
    val loggedInState: Flow<Boolean>
}

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        "SETUP APP MODEL HERE"
        val myAppModel= MyAppModel()
        setContent {
            MyUI(myAppModel)
        }
    }
}

@Composable
fun MyUI(vm: MyAppModel){
    val loggedIn = vm.loggedInState.asLiveData().observeAsState()
    when (loggedIn.value){
        is true -> DasboardUI()
        is false -> AuthUI()
    }
}

Now that I have a navgraph. It seems like Ill have to have to observe this state in every path in the navgraph to be able to react to it? Otherwise I could create two separate navigation hosts and have them separate for Authentication workflow and the rest of the app?

What does the error

java.lang.IllegalStateException: pending composition has not been applied

imply? I recently copy and pasted some google map code and now I'm getting this error

Hello! I had a discussion about text field focus on issue tracker, but probably slack is a better place to continue it. I can’t understand, why would text field need focus after keyboard is dismissed? Google engineer says: “It allows the user to dismiss the keyboard, but still continue typing on the keyboard without the user having to hit tab multiple times to re-focus on the TextField that was previously focused.“. What means “hit tab multiple times to re-focus” here? User needs one click on text field to start editing, no matter focused it or not, am I missing something? Is there another way to show keyboard for a focused text field?

Could someone please advise as to why during recomposition the scaffold state seems to be working as intended by the isTopBarEditing state is always reset to false. This is SearchTab is part of a bottom navigation bar and anytime I navigate away and come back to it, the scaffold state seem to hold the position of the SearchResults composable without a problem but isTopBarEditing is always reset to false (added snippet in thread)

Hello, is it possible to focus BasicTextField by calling requestFocus on FocusRequester (or other way) BUT WITHOUT triggering keyboard ?

We have a requirement to have a row with two boxes, and the width of each box is same as the widest box. Any idea how to achieve this optimally in Compose? I have a working solution but it requires multiple passes and flickers in the process.

Hello 🙂 what’s the best way to access a string resource inside a coroutine scope? Code in a :thread-please:

I am getting some weird kotlin compiler internal error exception while compiling specific

rc02

-based composable. It says it can't inline

Box$default

. Is this some known bug or should I report it? Exception: https://gist.github.com/dimsuz/99c94126807cfa6ca1dc515228a8913a

Looking at compose navigation docs. They say

Testing

We strongly recommended that you decouple the Navigation code from your composable destinations to enable testing each composable in isolation, separate from the NavHost composable.

What does that last bit mean? Decouple nav code from composables EXCEPT the navHost composable (since there's no real way to decouple that, right?). Just checking because I'm not familiar with the "separate from" terminology.

I see Missing classes error for all previews.

I'm currently using the vanpra compose date/time pickers which is pretty good, but I was wondering if any official implementations are also planned?