How can I use predefined UI portions as scaffold parameters without getting this warning? > The expression is unused

I am trying to create cube grid animation like the first video, In my implementation for first time the animation is working as expected, after the animation repeat everyting is becoming mess...i guess when using

repeatable{}

the keyframe delay is not working as expected.

How to divide available space in a row evenly between items? For a bottomBar for example, the items tend to stick to start by default.

I using Modifier.clickable() for handle click event but when i tap to view showing effect on view(like ripple effect).How can i disable this?

I'm using

launchInComposition

as shown here to call suspend function....what's recommended way to show progress indicator (like

CircularProgressIndicator

) until that function completes?

@Composable
fun MainLayout(sdk: SpaceXSDK) {
    var launches by remember { mutableStateOf<List<RocketLaunch>>(emptyList()) }

    launchInComposition {
        launches = sdk.getLaunches(false)
    }
    
    LazyColumnFor(items = launches) { launch ->
        LaunchView(launch)
    }
}

Here's hoping it hasn't been too many times... Is is intended/ok to have

State

in ViewModels?

I am trying to use

remember

with

mutableStateOf

as a property delegate, but I am getting this error.

Type 'TypeVariable(T)' has no method 'getValue(Nothing?, KProperty<*>)' and thus it cannot serve as a delegate

Here is the usage

var selectedItem by remember { mutableStateOf(0) }

Currently I am using AS 4.2 Canary 10 with Compose Alpha 02. Am I doing something wrong or is this an issue?

How can achieve this TextField? Seems very difficult to write extra code on top of

BaseTextField

.

What's compose stand about persistent UI? Such as keeping the same AppBar across multiple screen. Is it expected that we change the whole screen everytime in Compose?

Hey everyone! Don’t want to over self-promo here, but just wanted to let you all know that I’m starting a twitch + youtube channel where I will be live-streaming a bunch of stuff about compose. Made a quick video to explain more about what the content will be about and the motivation! Twitch: https://www.twitch.tv/intelligibabble

Is animation inspector for compose already exist in android studio canary?

Where would you start if you want to implement

ChipGroup

? Some custom

Layout

or some combination of

Column

and

Row

?

Hi, there! Did anyone took the Using State in Jetpack Compose codelab? Once I’ve finished the Dynamic UI based on state section, when running the codelab project, adding items by clicking the add button goes ok, but when clicking on ime action from keyboard, it adds a default item (no text + default icon). Moreover, if I hide the keyboard, show it back and then press action button, it does add the item properly. Oh, and that’s with the

start

project,

finished

doesn’t even do anything. I’m building the codelab project from AS 4.2 Canary 10, Compose alpha-02 and running it on a Google Pixel 3a.

Which is the most performing way to wrap a composable just to add a modifier?

Where can I see these sample codes written in the documentation?

*
 * @sample androidx.compose.material.samples.ButtonSample
 *
 * If you need to add an icon just put it inside the [content] slot together with a spacing
 * and a text:
 *
 * @sample androidx.compose.material.samples.ButtonWithIconSample

I also had the idea of using

ambientOf

in this way, which is basically the same way you would use

@EnvironmentObject

in SwiftUI: https://kotlinlang.slack.com/archives/CJLTWPH7S/p1592352556316500

@Composable
fun foo(appState: StateFlow<ChannelState>) {
  val currState by appState.collectAsState()
  Providers(CurrAppState provides currState) {
    // Content that should see currState
  }
}

as a kind of “dependency injection”, which “saves” an object in the environment, so that it’s possible to call it down the tree without having it passed all the time as a parameter. But I didn’t understand the explanation of @Adam Powell and @Zach Klippenstein (he/him) [MOD] why

ambientOf

should not be used in this use case, and what is the way to use it instead.

Hi, I was wondering if anyone understands how

Crossfade

composable work? How does it it able to fade in and fade out the Composables? Why are there two

Stack

inside

Crossfade

? What exactly does

invalidate

do? and so on and so forth.. I would like to create a custom transition of my own but i struggle to understand how it works. Any guide on where I should start so I could understand these concepts better?

Anyone know how to set dark mode in the preview window? I have a custom theme that i can pass colors, but the default is to call a composable function which checks the

isSystemInDarkTheme()

function and decides whether to return my light or dark colors instance.

Has anyone run into this lately? Kotlinx.serialization not working with jetpack compose? https://issuetracker.google.com/issues/157901343

Okay, I feel really dumb. I have a new project and I'm just trying to add a simple material TextField to the screen. Why is this not working? TextField seems to accept a string value, and a onValueChange of a string as well.

TextField(value = "first", onValueChange = { s: String -> })

Do I have to import any specific library to retrieve a ViewModel into a @Composable function? I'm trying to retrieve it and the app crashes

val viewModel: LoginViewModel by viewModel()

I have a

LazyColumnFor

that displays 20 items. The items consist of an image and some text. When displaying 20 items with each image of size 128kb, it lags like hell. Is this a bug or am I missing something? Also, it works totally fine when displaying only text.

I am having a problem in the "Layouts in Jetpack Compose" Codelab. Chapter 6 "Create your custom layout". You are supposed to map a List of Measurables to a list of Placeables. The

map

operator doesn't work for me though. I am getting the error:

Unresolved reference. None of the following candidates is applicable because of receiver type mismatch: ...

.fastMap

works though. Why is this happening? Should I report this? Link to codelab: https://developer.android.com/codelabs/jetpack-compose-layouts#5

I'm trying to use Canvas in compose, and am seeing what looks like old state in my DrawScope. I sort of expected that the canvas would be cleared each time. Is there a way for me to clear the draw scope, so that it just repaints the whole canvas?

Hello, I was doing the

Migrating to Jetpack Compose

codelab then on the

Testing

tab it mentions that you can use

findByText

to validate a composable String the strange thing is that function doesn't appear

Hi, I followed the Jetpack Compose Theming Codelabs tutorial to the letter but my status bar is still purple. Any ideas what I need to do? I would like it to be white in LightTheme and black in DarkTheme...

Is it possible to create a ViewModel inside a Compose function? What would be the approach in Compose only app?

Hello! The latest Jetpack Compose minor release, alpha03, has just dropped! You can get it now on Google’s Maven Repository. Release notes are available at https://developer.android.com/jetpack/androidx/versions/all-channel. As always, feedback is welcome at https://issuetracker.google.com/issues/new?component=612128.

I want to change layout directions how can I do that thanks