Has someone made AspectRactio composable like this one for flutter? https://api.flutter.dev/flutter/widgets/AspectRatio-class.html

👋 Has anyone looked into Jetpack Compose on Android TV devices yet? and is there any details on support? I see some functionality around focus but I have not dived into them yet to explore how its supported on TV 🙂

Hi. I have a question about how to choose

ambientOf

and

staticAmbientOf

. Since

staticAmbientOf

will force all children doing recomposition, seems like

ambientOf

is more efficient. But after search the source code, I found that there are more occurrences of

staticAmbientOf

. I understand that most of them are rarely changed and the comment of

staticAmbientOf

says:

A static ambient should be only be used when the value provided is highly unlikely to change.

But why not just using

staticOf

? Are there any circumstances that we must do all children recomposition? I would be very happy if there were some guides to told me how to choose between

ambientOf

and

staticAmbientOf

. Thanks!

Hey there, do you know if there is a composable like this one for Flutter? I’ve managed to kind of replicate the functionality that I required with a combination of a

WithConstraints

composable and a

drawLayer

modifier with scaleX and scaleY, but it was much more cumbersome to achieve my expected result https://api.flutter.dev/flutter/widgets/FittedBox-class.html

NavBackStackEntry in composable() returns a different ViewModelStore every time it's called. Is it a desired behavior?

What's the recommended way to load an image from an url in compose?

How can I find center coordinates of a Composable?

I'm trying to implement the new compose navigation and I get this weird error:

Where to find the source code of example usage samples ??

androidx.compose.material.samples.MenuSample

Hello, question about navigation-compose I want to add a

composable

destination to a NavHost at runtime. How do I do so without reloading the current Composable that is seen on the screen? By having a mutable state that is read from

NavHost

, the entire screen is refreshed (and animations look weird, state is reset etc)

Is there a way to “store” a composable function as a method of a data class/interface and call it programmatically from another composable function? I’m getting a weird java.lang.NoSuchMethodError when trying to invoke the

render

method

interface TestScreen<State: Any> {
    val name: String
    val initialState: State
    @Composable
    fun render(state: State, setState: (State) -> Unit)
}

Are there any thoughts already on how to gradually migrate from a fragment only to a compose only world?

Whoa, JetBrains Compose on desktop is available in the latest IDEA CE EAP! More information in this Twitter thread: https://mobile.twitter.com/iateyourmic/status/1323551064512172033

Unresolved reference: launchInComposition. Do I need external dependencies for this ??

Got this weird error ??

FloatingActionButton(
        onClick = {
            LaunchedTask {
                scaffoldState.snackbarHostState.showSnackbar(
                    "Hello World..",
                    "",
                    SnackbarDuration.Short
                )
            }
        }

@Composable invocations can only happen from the context of a @Composable function

Row

doesn't want to get recomposed even after his child

Text

become bigger. Should I recompose it manually? If yes, how can I do it?

Hey folks, I'm trying to write some tests for compose but I'm not sure what dependency to include for onNodeWithText to work. I've got

androidTestImplementation("androidx.ui:ui-test:$COMPOSE_VERSION")

but it won't import anything or even mark it as not being imported, I'm not sure what I'm missing

I’m running into an intermittent issue in alpha06 where `TextField`s don’t bring up the keyboard when focused. Has anyone run into this issue? Another issue I have with my

TextField

in alpha06 is that

ImeAction.GO

doesn’t seem to be working the same way it was in previous versions.

val focusRequester = FocusRequester()

            TextField(
                value = text,
                onValueChange = viewModel::setEmail,
                label = { Text(text = "What's your email address?") },
                placeholder = { Text(text = "<mailto:jane.doe@gmail.com|jane.doe@gmail.com>") },
                keyboardType = KeyboardType.Email,
                modifier = frameFillWidth(60.dp).focusRequester(focusRequester),
                backgroundColor = MaterialTheme.colors.background,
                imeAction = ImeAction.Go,
                onImeActionPerformed = { action, keyboardState ->
                    submit()
                }
            )

            onActive(callback = {
                focusRequester.requestFocus()
            })

Hey folks, I'm having a few more issue with running some tests for compose, running my rather basic test doesn't seem to launch the app

java.lang.AssertionError: Activity never becomes requested state "[STARTED, CREATED, DESTROYED, RESUMED]" (last lifecycle transition = "PRE_ON_CREATE")

So in order to avoid applying a tint to an

Icon

I’m using the below. Is there anything in the current compose lib that’s equivalent?

@Composable
fun ColorIcon(asset: VectorAsset, modifier: Modifier = Modifier) {
    val painter = rememberVectorPainter(asset = asset)
    Box(modifier.defaultSizeFor(painter).paint(painter))
}

private fun Modifier.defaultSizeFor(painter: Painter) =
    this.then(
        if (painter.intrinsicSize == Size.Unspecified || painter.intrinsicSize.isInfinite()) {
            DefaultIconSizeModifier
        } else {
            Modifier
        }
    )

private fun Size.isInfinite() = width.isInfinite() && height.isInfinite()

// Default icon size, for icons with no intrinsic size information
private val DefaultIconSizeModifier = Modifier.preferredSize(24.dp)

Is there an equivalent to Android Studio’s sample resources for `@Preview`s? I would love to have preview-only resources like images. Text is relatively easy to just put in the preview function, but images are more difficult.

Who has faced this issue? https://mobile.twitter.com/Joklinztech/status/1323375378958815232

I think in previous versions, we could see the source code and check out documentation for each built-in composable. Now in alpha06, when I click a composable, I see a decompiled class file. Am I missing something?

Has anyone used the

BackdropScaffold

? I'm curious about what you've added to the backgroundLayer

I tried to generate multiple previews for a Composable using two preview parameters. It seems that having multiple preview parameters is not allowed. I’m kinda sad about it 😞 Useful use case : previewing a design system component against multiple themes & multiple sample data

Hey folks, I'm using mockito to mock a viewmodel and then return certain values

@Mock
lateinit var viewModel: ImageListViewModel
...

`when`(viewModel.imageItems).thenReturn(listOf())

but doing this gives me an error:

java.lang.NullPointerException: Attempt to invoke interface method 'java.lang.Object androidx.compose.runtime.State.getValue()' on a null object reference

where imageItems is

var imageItems: List<ImageItem> by mutableStateOf(listOf())
	private set

would anyone know what I'm doing wrong?

This message was deleted.

I am trying to include compose (1.0.0-alpha06) in an existing project which is using kotlin (1.4.10), But I am getting build error due to 'kotlin-android-extensions' unbound symbols not allowed for kotlinx.android.synthetic.mainActivity As of now is there any workaround to use compose without removing all the code which uses kotlinx.android.synthetic, because that is a cumbersome.

Running into the same issue (and use case): https://stackoverflow.com/questions/64675386/how-to-get-activity-in-compose