kotlinlang #compose

How can i invalidate a complete tree of composables. So i want to force that all childs gets rendered again. (I have a very special use case where this is necessary) My problem is that compose optimizes to much 😄

Colton Idle

04/07/2021, 9:49 AM

If anyone wants to quickly surround some composables with a row or column, I found a way to do it without any plugins or anything. just use the typical "surround with" shortcut (alt cmd t on mac bindings)

🤔 1

Walter Berggren

04/07/2021, 11:36 AM

Hi! I’m running into the following exception when executing

hiltNavGraphViewModel()

in a NavHost:

Expected an activity context for creating a HiltViewModelFactory for a NavBackStackEntry but instead found: android.app.ContextImpl@78d1695

Hatice Sarp

04/07/2021, 12:37 PM

Hi everyone, I'm doing fade out/in and slide with animation. But while doing these, the content size also needs to change. While fade out in the code I wrote, I slide the items under it. I am also changing the parent's content size. But the bottom item disappears without slide (

near my age item in the video

). Another problem is that if I slide the top group on the screen so that they do not appear on the screen and run the animation, the top group items disappear from the screen. My code is like this:

Rahul Sainani

04/07/2021, 2:18 PM

Hello, is there a way to clear the whole back stack when using navigation with compose? sometimes the start/initial route might be already popped, in that case:

popUpTo(Route.initial) { inclusive = true }

doesn't seem to work and all the routes after initial are still present. Is there a way to make sure we clear the back stack without knowing about the first route in the graph?

Tolriq

04/07/2021, 2:29 PM

I'm starting to evaluate the impact of a slow migration to Compose but I'm having an hard time understanding the values in https://medium.com/androiddevelopers/jetpack-compose-before-and-after-8b43ba0b7d4f. How adding 4k methods results in a smaller dex size? Is there any other documents about the "weight" of compose during transition?

allan.conda

04/07/2021, 4:05 PM

I’m currently migrating our code to use

compose-navigation

. Are there any guidelines currently about multi-module with this? Let’s say I have two feature modules, what’s a good way to navigate screens between them without depending on each other? I’m thinking to put hoist the actual navigation into the top-level navigation (where the NavHost is), I wonder if I should be putting all those instances in there, which would be a lot for a highly-modular application.

julioromano

04/07/2021, 5:08 PM

Looks like beta04 is among us… 🤓 https://developer.android.com/jetpack/androidx/releases/compose

🥳 1

:party-parrot: 5

🎉 22

julioromano

04/07/2021, 5:38 PM

For some reason my project insists on using

navigation-compose:1.0.0-alpha08

event though my build.gradle.kts explicitly says

"androidx.navigation:navigation-compose:1.0.0-alpha10"

. Any hint on how can I troubleshoot this?

👀 1

Gabriel

04/07/2021, 7:40 PM

I have a columns with 3 items in, a button that stick at the top, a LazyColumn for scrolling item, and another button that I want to stick to the bottom, how can I stick the button to the bottom if the scrollable column only has a couple if items in?

Timon Bohn

04/07/2021, 8:28 PM

Any idea on how to adjustPan the software keyboard when a BasicTextField with decorationBox comes into focus? The keyboard appears --> the content scrolls up, but only until the TextField input area. It does not observe the extra padding provided by the decorationBox. Is there either a none jetpack compose specific windowSoftInputMode solution that let me add some extra offset, or is there a decorationBox configuration that I’m missing?

julioromano

04/07/2021, 9:30 PM

Can

LocalSoftwareKeyboardController

and

AndroidView

work together? I’m trying to show the keyboard when the only editable text is inside an

AndroidView

. In the update block of

AndroidView

I first call

it.requestFocus()

then

keyboardController?.show()

but nothing happens. If instead of

it.requestFocus()

on the view I try to set a

focusRequester

modifier on the Android view and then call

focusRequester.requestFocus()

I get an IllegalStateException: FocusRequester is not initialized. But I’d love the keyboard to show up as soon as the composable is first shown on screen.

Bryan L

04/07/2021, 9:46 PM

Does anyone know of any examples that use Firebase Authentication in pure compose? I'm having a difficult time building it from scratch without finding any concrete examples as the examples all(including docs) utilize multiple activities, xml, & have deprecated functions (i.e

onActivityResult

). Perhaps it's better to interop and utilize multiple acitivites and break the app from being pure Compose? Any guidance/advice is greatly appreciated!

Colton Idle

04/07/2021, 10:44 PM

I'm working on a kiosk app that will use a single activity and mostly fragments with composables, and I have a requirement to build in a "admin" alert dialog that shows up any time you click 5 times in a single spot of the app. I see two ways forward. 1: Try to write this on the activity level (I tried onTouchEvent but it seems like it doesn't get triggered because I have FragmentContainerView and that seems to get the events) 2. Write a composable theme that can intercept all touch events, but still let events pass through. Has anyone had experience with trying to have this kind of global x user tap listener? I know a lot of people have created debug menus, etc.

thequinneffect

04/07/2021, 11:49 PM

Hi everyone. I'm hoping someone can help me with an issue i'm having with DropDownMenu. I made a stackoverflow post here: https://stackoverflow.com/questions/66965883/jetpack-compose-how-to-force-a-dropdownmenu-to-be-anchored-underneath-its-paren The TLDR of it is that my dropdown menu is too large to remain anchored under the button that opens it (or it is anchored but centered vertically). How can I force it to expand in height from the bottom of the button it is anchored to, to the bottom of the screen? I've tried playing around with wrapContentSize but that allows it to be too tall. The only thing that has kind of worked but seems like a hacky solution was to just manually set the height to 200.dp (but this is not exactly to the bottom of the screen). Any help would be very much appreciated, I've been stuck on this for days...

Deepak Gahlot

04/08/2021, 2:54 AM

Hello All,

Tuba Kesten

04/08/2021, 6:10 AM

Hello 🙂 Since I changed to version "beta03" I get the following error message when I try to backpress in a suspend function. How can I fix this error?

java.lang.IllegalStateException: A MonotonicFrameClock is not available in this CoroutineContext. Callers should supply an appropriate MonotonicFrameClock using withContext.

lifecycleScope.launch { bottomBarManager?.onBackPressed() }
super.onBackPressed()

pawegio

04/08/2021, 7:08 AM

Are there any release notes for Arctic Fox 13 & 14? 🤔 Both are missing on: https://androidstudio.googleblog.com/

☝️ 4

julioromano

04/08/2021, 7:40 AM

How to show the software keyboard on composition (i.e. when a screen composable is first displayed)?

Jason Ankers

04/08/2021, 7:51 AM

If a bottom tab acts as a top level destination for a series of different screens, would this be the correct use-case for a nested graph? If so, how is it possible to determine if the current route belongs to this nested graph? The docs show an example determining if the bottom tab icon is selected by checking if

currentRoute == screen.route

, but what if we’re on a nested route beneath this? https://developer.android.com/jetpack/compose/navigation#bottom-nav

Smorg

04/08/2021, 7:53 AM

Any pointers to why AS Canary on my laptop (MacBook Pro., 16GB Memory, Core i5) get stuck at completing analysing source files. This has been happening since I added Compose dependencies to the project and across multiple updates of the IDE. I have had to do “Invalidate Caches and Restart” countless of times to resolve it, but the issue returns few minutes after each one. Any ideas how to fix this please?

darkmoon_uk

04/08/2021, 8:47 AM

Looks like there's a bug in the Crane Compose sample, here: See this line where the map is updated e.g. by a change in zoom. The map preparation coroutine will run with every recomposition. Firstly it feels to me like running

getMapAsync

every time is rather inefficient, the first returned instance could be cached? But ok, if we let that pass and assume that the same Map instance will be returned each time... then this code is continually adding more MapMarkers to the map and never removing them?

MBegemot

04/08/2021, 10:12 AM

Nice!!! all my theming problems went away !! than you!

🎉 1

allan.conda

04/08/2021, 10:25 AM

I have been thinking about how I could handle full screen navigations (screens that show on top of the bottom navigation screens. I’m thinking of using nested NavHost, but I read somewhere here that it’s not a good idea. I’m also not sure if sharing

navController

(bottom navigation triggers a fullscreen navigatino) in multiple NavHost is a supported thing 😅. How is everyone handling fullscreen navigations?

allan.conda

04/08/2021, 12:02 PM

Do you guys just define a

TopAppBar

for each of your screen? Or share a single one and somehow manage to customize it (set title, navigation icon)? I’m trying to do the latter with

compose-navigation

in a multi-modular context, and now contemplating whether this is really a good idea…

Indu

04/08/2021, 3:19 PM

I read a few threads which gave me more info to choose between Layout and BoxwithConstraints. I used Layout for constructing the following screen. Basically I'm changing the number of elements in a row depending on the width of the screen.

Nthily

04/08/2021, 5:44 PM

How do I get the specific coordinates of a control?

Altynbek Nurtaza

04/08/2021, 6:54 PM

hi guys, does anybody know if there is an easy way to do the following:

var var1 = rememberSaveable { mutableStateOf(Bundle()) }
var var2 = rememberSaveable { mutableStateOf(Bundle()) }
var var3 = rememberSaveable { mutableStateOf(Bundle()) }
var var4 = rememberSaveable { mutableStateOf(Bundle()) }
var var5 = rememberSaveable { mutableStateOf(Bundle()) }
var var6 = rememberSaveable { mutableStateOf(Bundle()) }

Mini

04/08/2021, 7:15 PM

I want to test composables without the need for an emulator/device. Theres been talk in this channel of using robolectric, with custom runners etc. and people have reported partial success, however I have not been able to set it up properly. I have also tried to add the compose-desktop version of the compose testing library to my android project, also with no success. Could anyone shed some light on what would be the best way to go about running compose tests on JVM?

Title

Mini

04/08/2021, 7:15 PM

jim

04/08/2021, 7:34 PM

I think using Compose for Desktop would be your best bet, but it is kinda self-service at the moment, as we don't have an official set of test rules at the moment. Such a thing will likely come at some point after Compose 1.0 is released.

We have a bunch of unit tests in the androidx library (see: https://cs.android.com/search?q=DesktopScreenshotTestRule). It would likely take some effort to extract the relevant pieces for your own usage though.

Until such time as a more official solution is released.

💯 1

Mini

05/10/2021, 5:54 PM

Jim, I have been playing around with this for a while now, but I dont seem to be getting anywhere. Honestly I think my understanding of multiplatform is quite lacking. Ideally I would just add testImplementation org.jetbrains.compose.ui:ui-test-junit4 to my android project and run composable tests that do not require anything android from my test folder. However that dependency seems to provide the aar i would get from an androidx dependency (assuming this is simply a proxy for multiplatform projects??) Then I tried extracting parts of the DesktopComposeTestRule but realised I would basically be reimplementing compose for desktop, which seems silly. I figured another option would be to create a jvm library that depends on the jetbrains version and then exposes the rule I need to the rest of my project. So, I am pretty much just guessing at where to start, and failing miserably 😅 Could you elaborate on what you mean by extract the relevant pieces, and point me in the right direction? 🙏

jim

05/10/2021, 6:01 PM

I figured another option would be to create a jvm library that depends on the jetbrains version and then exposes the rule

When I said "using Compose for Desktop would be your best bet", that does mean taking a dependency on the jetbrains version. You may want to look at the work @cb did with Accompanist to see how he introduced tests using desktop: • Tweet: https://twitter.com/chrisbanes/status/1390653509146660864 • Source code: https://github.com/google/accompanist/pull/393

👀 2

Mini

05/10/2021, 6:16 PM

Well, seems like he has done exactly what I want.. 🤔 Thank you Jim!

👍 1

fabio.carballo

10/12/2021, 3:24 PM

hey @jim - is there any update on this topic? I was now looking into the possibility of running compose tests without the resort to the emulator.

jim

10/12/2021, 4:44 PM

I don't think there is any news here yet. cc @Jelle Fresen [G]

🙏 1

Jelle Fresen [G]

10/12/2021, 5:19 PM

Correct, no news yet

Mini

10/12/2021, 5:26 PM

@fabio.carballo you can however use robolectric now

fabio.carballo

10/13/2021, 7:08 AM

hmm - really @Mini? do you have any sample on the web or so? yesterday I had tried to run it on top of

FragmentScenario

with no success.

Mini

10/13/2021, 7:50 AM

I do something like this:

class TestApplication : Application()

@RunWith(AndroidJUnit4::class)
@Config(application = TestApplication::class)
class SomeTest {

    @get:Rule
    val rule = createComposeRule()
    
    @Test
    fun someTest() {

        rule.setContent { 
            Text("Hello")
        }

        rule.onNodeWithText("Hello").assertIsDisplayed()
    }
}

🙏 1

Jelle Fresen [G]

10/13/2021, 2:49 PM

Yes, this should work. A few things to keep in mind: nothing is rendered (so no captureToImage()); no access to Bitmap (so no ImageBitmap); text is measured with default values (so can't assert size of components that wrap around text); and custom test runners are not yet supported

AFAIA these are mostly the same limitations as non-compose Robolectric tests

fabio.carballo

10/13/2021, 6:20 PM

okok, perfect! thanks for the clarifications

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