Is it possible to go from a Color to a hex value? i.e. I have some colors defined, but I want to print out the hex value on top of the color for debugging so it would be nice to just be able to reference the Color and get the hex value.

Am I correct that

DisposableEffect

and

LaunchedEffect

are essentially the same except that they use different methods to make the same thing: `DisposableEffect`’s block is blocking and disposes stuff with

onDispose

and `LaunchedEffect`’s block is suspending and disposes stuff with

scope.cancel()

?

I'm trying to update to Compose

alpha12

, the

setContent

is now deprecated, so I added

androidx.activity:activity-compose:1.3.0-alpha01

to the dependencies and updated the import. The build fails with the following error. Is there a fix for this?

Task :sample:counter:app-android:compileDebugKotlin FAILED
w: Flag is not supported by this version of the compiler: -Xallow-jvm-ir-dependencies
w: ATTENTION!
This build uses unsafe internal compiler arguments:

-XXLanguage:+NonParenthesizedAnnotationsOnFunctionalTypes

This mode is not recommended for production use,
as no stability/compatibility guarantees are given on
compiler or generated code. Use it at your own risk!

e: Classes compiled by an unstable version of the Kotlin compiler were found in dependencies. Remove them from the classpath or use '-Xallow-unstable-dependencies' to suppress errors
e: /home/aivanov/dev/workspace/Decompose/sample/counter/app-android/src/main/java/com/arkivanov/counter/app/MainActivity.kt: (39, 9): Class 'androidx.activity.compose.ComponentActivityKt' is compiled by an unstable version of the Kotlin compiler and cannot be loaded by this compiler

That's related to the issue that Chris just linked above: https://issuetracker.google.com/179911234

I use

mutableStateListOf().parallelStream().forEach {}

and coroutines to execute the items in parallel, but it seems some executions won't be run. And the missing executions are random. Is there a solution?

⚠️ Should I be worried about the warnings in image below? 👇 I'm seeing a lot of it after upgrading to

1.4.30

/ Compose

alpha12

, and setting:

kotlinOptions {
            jvmTarget = "15"
            ...

...which appears necessary to use the new IR compiler in

1.4.30

⚠️ Another issue; compiler advises to switch to using

androidx.lifecycle:lifecycle-viewmodel.compose:1.0.0-alpha01

but that package isn't published.

Getting this error in Compose `alpha12`:

java.lang.IllegalArgumentException: offset(4) is out of bounds [0, 3]
        at androidx.compose.ui.text.MultiParagraph.requireIndexInRangeInclusiveEnd(MultiParagraph.kt:588)
        at androidx.compose.ui.text.MultiParagraph.getCursorRect(MultiParagraph.kt:437)

...full trace in thread. This occurs after typing a few chars into the text-box. Bit hard to provide our code, but can say we are using a visual transformation which I suppose may affect cursor position / character indexing.

After upgrading compose and Kotlin version to 

1.4.30

 it seems my android studio is confused. Project is building and running though.

Hi anybody tried new sealed interface ? I’m having issue. A.S is not recognizing this type of interface

I'm upgrading to compose

alpha12

. Last warning I have is

Flag is not supported by this version of the compiler: -Xallow-jvm-ir-dependencies

. Does anyone know why ? 🙏

I think

PointerInputScope.detectDragGestures

is missing

onDragStart

callback.

DragObserver

had it and now it is deprecated in favor of

PointerInputScope.detectDragGestures

. I could workaround this with boolean but it is quite inconvenient. Maybe another way?

How can I use

FlingConfig

with new

animateDecay

? Can’t see where to apply

FlingConfig::adjustTarget

No compilation errors but AS Canary 5 shows this error after upgrade to Compose alpha12.

Is it a bug at Animatable.kt#173 since

clampedValue

is the actual result but never being used

[SOLVED] I want to open some Compose sources in Android Studio. But it shows a decompiled

.class

file, prompts to download sources, and then I get this:

Execution failed for task ':app:DownloadSources'.
> Could not resolve all files for configuration ':app:downloadSources_...'.
   > Could not find androidx.compose.foundation:foundation-layout:1.0.0-alpha12@aar.

What could be the reason of it? (Earlier today I removed

~/.gradle/cache

directory, in the process of upgrading to compose alpha12. )

I was using ModalBottomSheet like this:

ModalBottomSheetLayout(
    sheetContent = {
        // sheet content
    }
) {
   // content of rest of the screen
}

So when I trigger

modalBottomSheetState.show()

, sheet gets visible and blocks screen behind it but the

back button is not closing the sheet

So I created composable and added it to navigation, but now sheet is

taking fullscreen, regardless of sheet content and modifier.height()

, so how can I achieve behaviour like bottom sheet blocking back screen and navigating back

Why can't I CMD-B into the

remember

function declaration? Is it like a dummy symbol that is interpreted by the compiler?

I think I got an infinite loop in

Recomposer.kt

. Only Compose’s code in the thread stack. I’m on alpha12

Class 'androidx.navigation.compose.NavHostControllerKt' is compiled by an unstable version of the Kotlin compiler and cannot be loaded by this compiler

I updated to

alpha12

and getting error , any reasons?

Is it possible that latest Navigation Compose is missing a dependency with

activity-compose

? When calling NavHost(…) the app crashs with

java.lang.NoClassDefFoundError: Failed resolution of: Landroidx/activity/compose/LocalOnBackPressedDispatcherOwner;

. I added the following dependency to my project:

implementation("androidx.activity:activity-compose:1.3.0-alpha02")

and not it seems to work smoothly

How would I find out the measurements for a specific node? For example, if I want to load an image from a remote service that accepts a width and height parameter, and I want to set that width and height to match the layout, how can I get that information?

Sorry, I know this is not directly related to compose, but this happened when i tried to go back to alpha11 from alpha12. I now have these Duplicate errors like so:

Duplicate class androidx.compose.runtime.savedinstancestate.ExperimentalRestorableStateHolder found in modules jetified-runtime-saveable-1.0.0-alpha12-runtime (androidx.compose.runtime:runtime-saveable:1.0.0-alpha12) and jetified-runtime-saved-instance-state-1.0.0-alpha11-runtime (androidx.compose.runtime:runtime-saved-instance-state:1.0.0-alpha11)

Anybody here know how to clean out the jetifier cache? I tried cleaning all Gradles caches, but that did not fix it. Thanks!

If I wanted to rotate an entire screen 90 degrees, and set the width to the screen height, and the height to the screen width (this is for a vertical screen on apple tv, and the landscape to portrait rotation doesn’t do what’s expected), what would be the best way to do that with compose, since I don’t have the rendered width and height when declaring size in compose?

How I can get Kotlin 1.4.30 for AS Canary 7?

After reading the source code and some texts here I think people are saying that

DisposableEffect

with empty

onDispose

is a code smell. And we should avoid that. I want to load an article from server after user open the detail page. What should be the recommended way to load the data? Previously I was using

onActive

to load the data. ViewModel emits

StateFlow

which the view collect as state.

// pre- Alpha-11
    onActive { viewModel.loadData(articleID) }

    // post - Alpha-11
    DisposableEffect(articleID){
        viewModel.loadData(articleID)
        onDispose {  }
    }

Anybody using

koin.androidx.compose

for viewmodel injection into their composables? There is a solution for compile errors for compose alpha 12 here (https://github.com/InsertKoinIO/koin/issues/1006), but wondering if others have seen the same runtime errors and if there are workarounds

I have a suggestion for ModalBottomSheetLayout, users should have explicitly pass sheet state. Because I called sheetState.show() without passing sheetState to ModalBottomSheetLayout because it has a default parameter value and getting exception

Starting with Arctic Fox Canary 6, you can now inspect layouts written with the new Android declarative UI framework, Jetpack Compose. Whether your app uses layouts fully written in Compose or layouts that use a hybrid of Compose and Views, the Layout Inspector helps you understand how your layouts are rendered on your running device.

This feature requires that each module using the Compose UI declare the following dependencies.

Way cool feature!!! Good job team