It seems to me Android Studio 4.0-beta01 supports compose applications, but it shows the warning “Jetpack Compose is a preview feature, and support for Compose is included only in Canary versions of Android Studio. To use Compose in your app project, download and install the latest Canary version of the IDE.” When will be available a new Canary version?

val testList = mutableListOf(testList0, testList1)

for (i in 0 until 2) {
    tableRow {
        for (j in 0 until 3) {
            Padding(5.dp) {
                //Cell
                Button(
                text = testList[i][j],
 onClick = {
     Toast.makeText(context,testList[i][j],Toast.LENGTH_SHORT).show()

                    
                    }

                )
            }

        }
    }
}

i want to show button text on click of Button, but here no way to get text,

Is there a place to get changelogs/updates for changes to the compose plugin?

Related to @Val Salamakha’s observation above, I had AS Canary update to Beta 1, and was surprised to find Compose functionality stripped. I first checked the Compose docs thinking that maybe there was something I needed to do to re-enable it. The Android Studio + Compose page (https://developer.android.com/jetpack/compose/setup) currently leads you to the preview page, which has you download Beta 1. Might be good to update that link + docs to point to the preview archive page (https://developer.android.com/studio/archive), with directions to look for the most recent canary build?

What’s more interesting is that I can scroll the

AdapterList

slowly and the app does not crash. It crashes when I try to fling the list up or down. I’m also seeing messages from the Choreographer about skipping frames so I’m thinking the quick fling is causing the UI updates to fall too far behind so the measure is missed at some point before the draw.

just fyi if you are tracking early experimental Compose uses. https://hackaday.com/2020/02/26/lora-mesh-network-with-off-the-shelf-hardware/

Hello! I am trying to add to my project a row with a column with take the maximum space available and other only the minimum space needed. I show in the codelab the modifiers Flexible and Inflexible but these seem to be deprecated. What are the replacement for this?

How can I pass

spanned

text to compose

Text

api ?

Flutter has a UI component

BackdropFilter

that lets you do stuff like blur whatever’s behind a view. I know that effect isn’t part of the Material spec, but is something like that possible (or potentially possible in the future) with Compose?

Hello! I'm trying to add background image for card in a list and card has a favourite toggle. When favourite state changing the composable function re-drawing the card and background re-drawing again. Is it possible to avoid re-drawing background image every time?

Made a new project with

dev05

today and cannot get

MaterialTheme.typography().h3

(or any other style) to work. Reports a code generation error and says see the log? also, if you just type MaterialTheme.typ and choose the code completion suggestion, it drops in a crazy string that includes a package name?

Hi, I am experimenting with

Draw

function and transitions currently and have noticed that child composable get recomposed every time transition state changes. Is it possible to avoid child function recomposition? Example:

val child = @Composable() { println("Hello") } 
Transition(definition) { state ->
    val x = state[X]
    Draw(child) {
        canvas.save()
        drawChildren()
        canvas.restore()
    }
}

Had slider working, not working anymore, another cryptic error I can do nothing with:

I am doing a CountdownTimer. So I am showing the time left in a Text component. But then I want to have a field that you can edit, and upon editing it, it will save some changes. I have used

TextField

before, but with a

TextFieldInput

that was in a state var, e.g.

state { TextFieldInput("") }

) But I already have a state so I wanted to put the TextFieldInput into that instance, so, something like

state { TimerState() }

where TimerState has the TextFieldInput in it, but not having much success with that. The other possibility (part of why I am posting) is way back during early MVC days there was another pattern called PAC. One of the main distinctions is PAC had hierarchies of components, and each component might have its own Abstraction (model) and controller. Should I do that? Make the text input a component? and if so, how do I bubble the edit result up to the enclosing component?

Re

CircularProgressIndicator

I notice it doesn't take a modifiers parameter. What is the recommended way to be able to change the layout of this component when it is underneath a Column{}. I want to be able to set LayoutGravity.center

Jetpack compose can’t work with kapt no?

When I interact with views I often need to post an action or wait until the next layout pass, etc... If I need to expand a view with an animation I can do something like this

container.doOnLayout { 
    val originalHeight = it.height

    // expandedChild visibility was GONE
    expandedChild.isVisible = true

    view.doOnPredraw {
        val newHeight = it.height
        expandedChild.isVisible = false
    }
}
// Now I can animate the container height between originalHeight & newHeight

How Could I achieve a similar behaviour with compose?

Current Ui toolkit for nested scrolling has a lot of things, nested scrolling parent, nested scrolling child, versions 1,2,3. Which is really confusing and bad. How compose will resolve this

Is there a way to benchmark

VerticalScroller

and

AdapterList

performance? As far as I have tried using HWUI Rendering test, can't make much out of it!

Just some if useful fyi from the "try deploying compose even though you shouldn't experiment". So far it seems to go well and the (fairly geeky) users are happy. But you might want to loop in the "Firebase Test lab" people if you haven't already. Because their standard instrumentation really doesn't like apps that don't use the conventional view hierarchy for their drawing. Lot's of false positives saying that the first frame is taking forever to draw, when in fact the app is running fine and cycling through it's test frames. Also a place to add analytics hooks for "screen" changes would be useful.

Hey composers, is

onActive

and

onCommit

etc still considered effects? Just the documentation for

onActive

starts with "

An effect used to observe the lifecycle of the composition.

So just wondering so I know what I am talking about when discussing this 😆

Some ramblings on LiveData usage, interested in feedback on how other folks are using LiveData so far with compose https://medium.com/@fluxtah/another-way-of-using-livedata-with-jetpack-compose-77a28c287af9?sk=69d5bf1973cffcb7d3665a33a405e99c

How compose box model works? for eg in

Surface(

modifier = modifier + LayoutPadding (

left = 8.dp,

top = 8.dp,

right = 8.dp,

bottom = 0.dp

),

color = Color.Green

) {

Container(width = 10.dp, height = 10.dp, padding = EdgeInsets(all = 10.dp)) {}

}

The green colors not paints on the paddings neither padding of Suface, neither Container. I tested with dev05.

Hi. I'm trying to use Icons.Menu as a vector icon for an AppBarIcon, but it's expecting a Painter type for the icon argument. Anyone have any tips?

Hello, Is it planned to have a clear guideline of how to build an app with Jetpack Compose, or it will be like React, and do what you want, it's just a UI library. 😊

Hello, does Compose support bottom navigation bar? I googled a lot but all the pages seem to talk about bottom app bar, not the nav bar.

any reason that imageResource and loadImageResource are started with lowercase?

I was playing with

compose-router

library made by @Zsolt . Found a few issues regarding back stack sequence and while trying to fix I ended up with a very different code base. I also needed callbacks for navigation events for DI or SL to be able to scope instances. Then I went deeper into it as I want to learn more about Compose and ended up with another navigation library. So here it is. Feel free to use it. Hopefully this is going to be deprecated as soon as Google rolls out their. Now I have some feedback to give them once they start doing it. https://github.com/mvarnagiris/compose-navigation