kotlinlang #compose

I'm getting this error when I moved a composable to separate fragment This Composable is being rendered inside a
FragmentContainerView
hosted inside a LinearLayout but sadly I need to use that LinearLayout in the xml, what can be done to make this work?

Copy code

java.lang.IllegalStateException: Nesting scrollable in the same direction layouts like ScrollableContainer and LazyColumnFor is not allowed. If you want to add a header before the list of items please take a look on LazyColumn component which has a DSL api which allows to first add a header via item() function and then the list of items via items().
        at androidx.compose.foundation.ScrollKt.assertNotNestingScrollableContainers-k00exg4(Scroll.kt:464)
        at androidx.compose.foundation.lazy.LazyListState.measure-5vC3nwU$foundation_release(LazyListState.kt:248)
        at androidx.compose.foundation.lazy.LazyListKt$LazyList$1.invoke(LazyList.kt:62)
        at androidx.compose.foundation.lazy.LazyListKt$LazyList$1.invoke(LazyList.kt)
        at androidx.compose.ui.layout.SubcomposeLayoutState$createMeasureBlocks$1.measure-8A2P9vY(SubcomposeLayout.kt:211)
        at androidx.compose.ui.node.InnerPlaceable.performMeasure-BRTryo0(InnerPlaceable.kt:47)
        at androidx.compose.ui.node.LayoutNodeWrapper.measure-BRTryo0(LayoutNodeWrapper.kt:124)
        at androidx.compose.foundation.layout.PaddingModifier.measure-za8Wrwc(LayoutPadding.kt:210)
        at androidx.compose.ui.node.ModifiedLayoutNode.performMeasure-BRTryo0(ModifiedLayoutNode.kt:36)
        at androidx.compose.ui.node.LayoutNodeWrapper.measure-BRTryo0(LayoutNodeWrapper.kt:124)
        at androidx.compose.ui.node.DelegatingLayoutNodeWrapper.performMeasure-BRTryo0(DelegatingLayoutNodeWrapper.kt:105)
        at androidx.compose.ui.node.LayerWrapper.performMeasure-BRTryo0(LayerWrapper.kt:67)
        at androidx.compose.ui.node.LayoutNodeWrapper.measure-BRTryo0(LayoutNodeWrapper.kt:124)
        at androidx.compose.ui.node.DelegatingLayoutNodeWrapper.performMeasure-BRTryo0(DelegatingLayoutNodeWrapper.kt:105)
        at androidx.compose.ui.node.LayoutNodeWrapper.measure-BRTryo0(LayoutNodeWrapper.kt:124)
        at androidx.compose.ui.node.DelegatingLayoutNodeWrapper.performMeasure-BRTryo0(DelegatingLayoutNodeWrapper.kt:105)
        at androidx.compose.ui.node.LayoutNodeWrapper.measure-BRTryo0(LayoutNodeWrapper.kt:124)
        at androidx.compose.ui.node.DelegatingLayoutNodeWrapper.performMeasure-BRTryo0(DelegatingLayoutNodeWrapper.kt:105)
        at androidx.compose.ui.node.LayoutNodeWrapper.measure-BRTryo0(LayoutNodeWrapper.kt:124)
        at androidx.compose.ui.node.OuterMeasurablePlaceable$remeasure$2.invoke(OuterMeasurablePlaceable.kt:91)
        at androidx.compose.ui.node.OuterMeasurablePlaceable$remeasure$2.invoke(OuterMeasurablePlaceable.kt)
        at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:133)
        at androidx.compose.ui.platform.AndroidComposeView.observeMeasureModelReads(AndroidComposeView.kt:482)
        at androidx.compose.ui.node.OuterMeasurablePlaceable.remeasure-BRTryo0(OuterMeasurablePlaceable.kt:90)
        at androidx.compose.ui.node.OuterMeasurablePlaceable.measure-BRTryo0(OuterMeasurablePlaceable.kt:63)
        at androidx.compose.ui.node.LayoutNode.measure-BRTryo0(LayoutNode.kt:1232)
        at androidx.compose.ui.layout.RootMeasureBlocks.measure-8A2P9vY(RootMeasureBlocks.kt:36)
        at androidx.compose.ui.node.InnerPlaceable.performMeasure-BRTryo0(InnerPlaceable.kt:47)
        at androidx.compose.ui.node.LayoutNodeWrapper.measure-BRTryo0(LayoutNodeWrapper.kt:124)
        at androidx.compose.ui.node.DelegatingLayoutNodeWrapper.performMeasure-BRTryo0(DelegatingLayoutNodeWrapper.kt:105)
        at androidx.compose.ui.node.LayoutNodeWrapper.measure-BRTryo0(LayoutNodeWrapper.kt:124)
        at androidx.compose.ui.node.DelegatingLayoutNodeWrapper.performMeasure-BRTryo0(DelegatingLayoutNodeWrapper.kt:105)
        at androidx.compose.ui.node.LayoutNodeWrapper.measure-BRTryo0(LayoutNodeWrapper.kt:124)
        at androidx.compose.ui.node.DelegatingLayoutNodeWrapper.performMeasure-BRTryo0(DelegatingLayoutNodeWrapper.kt:105)
        at androidx.compose.ui.node.LayoutNodeWrapper.measure-BRTryo0(LayoutNodeWrapper.kt:124)
        at androidx.compose.ui.node.DelegatingLayoutNodeWrapper.performMeasure-BRTryo0(DelegatingLayoutNodeWrapper.kt:105)
        at androidx.compose.ui.node.LayoutNodeWrapper.measure-BRTryo0(LayoutNodeWrapper.kt:124)
        at androi

I learned that I was using

LazyColumn

inside a

Column

and rectified my mistake but this error seems to continue showing regardless of any change.

dimsuz

12/06/2020, 10:26 PM

Hi! When doing unidirectional flows in pre-compose Android I constantly notice that it is nice to separate "static" properties from "dynamic" ones. For example if we render a

List<User>

where

User(id, name, isSelected)

and if this list is 100-200 users, then to immutably switch selection of 1 user costs a full realloc of whole List + 1 user object. In light of this I tend to split into something resembling

Pair<List<User(id, name)>, Set<String>>

, i.e. "static" user props and "dynamic" set of selected ids. It doesn't seem to be Compose specific, but I wonder, is this a good thing to do in general, or will ART optimize this anyway? And also: is there some terminology invented for this rather than mine static/dynamic thing?

zsperske

12/06/2020, 10:43 PM

Is there a hook for when a composable reappears on the screen? Looking for something like

onResume

onStart

in fragment land. Or am I thinking about this completely wrong?

Tlaster

12/07/2020, 7:59 AM

I got the error when using

pushStringAnnotation('Tag', 'sometext'); ...; pop();

annotatedString

when my phone is using with some accessibility function like Screen Reader's Select to Speak.

Copy code

Fatal Exception: java.lang.ClassCastException: java.lang.String cannot be cast to androidx.compose.ui.text.TtsAnnotation
       at androidx.compose.ui.text.platform.AndroidAccessibilitySpannableStringKt.toAccessibilitySpannableString(AndroidAccessibilitySpannableString.kt:60)
       at androidx.compose.ui.platform.AndroidComposeViewAccessibilityDelegateCompat.populateAccessibilityNodeInfoProperties(AndroidComposeViewAccessibilityDelegateCompat.kt:235)
       at androidx.compose.ui.platform.AndroidComposeViewAccessibilityDelegateCompat.createNodeInfo(AndroidComposeViewAccessibilityDelegateCompat.kt:184)
       at androidx.compose.ui.platform.AndroidComposeViewAccessibilityDelegateCompat.access$createNodeInfo()
       at androidx.compose.ui.platform.AndroidComposeViewAccessibilityDelegateCompat$MyNodeProvider.createAccessibilityNodeInfo(AndroidComposeViewAccessibilityDelegateCompat.kt:1600)
       at android.view.AccessibilityInteractionController$AccessibilityNodePrefetcher.prefetchDescendantsOfVirtualNode(AccessibilityInteractionController.java:1385)
       at android.view.AccessibilityInteractionController$AccessibilityNodePrefetcher.prefetchDescendantsOfRealNode(AccessibilityInteractionController.java:1298)
       at android.view.AccessibilityInteractionController$AccessibilityNodePrefetcher.prefetchAccessibilityNodeInfos(AccessibilityInteractionController.java:1096)
       at android.view.AccessibilityInteractionController.findAccessibilityNodeInfoByAccessibilityIdUiThread(AccessibilityInteractionController.java:342)
       at android.view.AccessibilityInteractionController.access$400(AccessibilityInteractionController.java:75)
       at android.view.AccessibilityInteractionController$PrivateHandler.handleMessage(AccessibilityInteractionController.java:1460)
       at android.os.Handler.dispatchMessage(Handler.java:106)
       at android.os.Looper.loop(Looper.java:223)
       at android.app.ActivityThread.main(ActivityThread.java:7656)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)

🐛 1

☝️ 1

Philip Blandford

12/07/2020, 11:04 AM

I see that alpha08 has introduced a snapToItem() method in LazyListState - is there an example of its usage? It's a suspend function, and I'm not clear what sort of coroutine scope I should be using and where..

Davide Bertola

12/07/2020, 11:13 AM

is it possible to use jetpack compose with the stable Android Studio ?

🚫 13

😭 1

salomonbrys

12/07/2020, 1:55 PM

Hey guys. I'm having a compiler error since updated my app to: • Android Studio Arctic Fox 2020.3.1 Canary 2 • Android Gradle Plugin 7.0.0-alpha02 • Kotlin to 1.4.20 • Compose version to 1.0.0-alpha08. The simplest compose method does not compile, i.e.:

Copy code

@Composable
fun foo() {
    val context = AmbientContext.current
}

gives the following error:

salomonbrys

12/07/2020, 1:55 PM

Copy code

java.lang.IllegalStateException: Backend Internal error: Exception during code generation
File being compiled: /Users/salomonbrys/Code/Acinq/phoenix-kmm/phoenix-android/src/main/java/fr/acinq/phoenix/android/utils/logger.kt
The root cause java.lang.RuntimeException was thrown at: org.jetbrains.kotlin.backend.jvm.codegen.FunctionCodegen.generate(FunctionCodegen.kt:53)
	at org.jetbrains.kotlin.backend.common.CodegenUtil.reportBackendException(CodegenUtil.kt:239)
	at org.jetbrains.kotlin.backend.jvm.JvmBackendFacade.doGenerateFilesInternal$backend_jvm(JvmBackendFacade.kt:156)
	at org.jetbrains.kotlin.backend.jvm.JvmBackendFacade.doGenerateFilesInternal$backend_jvm$default(JvmBackendFacade.kt:125)
	at org.jetbrains.kotlin.backend.jvm.JvmBackendFacade.doGenerateFiles(JvmBackendFacade.kt:112)
	at org.jetbrains.kotlin.backend.jvm.JvmIrCodegenFactory.generateModule(JvmIrCodegenFactory.kt:40)
	at org.jetbrains.kotlin.codegen.KotlinCodegenFacade.compileCorrectFiles(KotlinCodegenFacade.java:35)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.generate(KotlinToJVMBytecodeCompiler.kt:647)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules$cli(KotlinToJVMBytecodeCompiler.kt:210)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules$cli$default(KotlinToJVMBytecodeCompiler.kt:162)
	at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:169)
	at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:52)
	at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:88)
	at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:44)
	at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:98)
	at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:371)
	at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:105)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileIncrementally(IncrementalCompilerRunner.kt:249)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.access$compileIncrementally(IncrementalCompilerRunner.kt:38)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner$compile$2.invoke(IncrementalCompilerRunner.kt:80)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compile(IncrementalCompilerRunner.kt:92)
	at org.jetbrains.kotlin.daemon.CompileServiceImplBase.execIncrementalCompiler(CompileServiceImpl.kt:602)
	at org.jetbrains.kotlin.daemon.CompileServiceImplBase.access$execIncrementalCompiler(CompileServiceImpl.kt:93)
	at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:1644)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:359)
	at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:200)
	at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:197)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.rmi/sun.rmi.transport.Transport.serviceCall(Transport.java:196)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:562)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:796)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:677)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:676)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.RuntimeException: Exception while generating code for:
FUN name:foo visibility:public modality:FINAL <> () returnType:kotlin.Unit
  annotations:
    Composable
  BLOCK_BODY
    VAR name:context type:android.content.Context [val]
      CALL 'public final fun <get-current> (): T of androidx.compose.runtime.Ambient [inline] declared in androidx.compose.runtime.Ambient' type=android.content.Context origin=null
        $this: TYPE_OP type=androidx.compose.runtime.Ambient<T of androidx.compose.runtime.Ambient> origin=IMPLICIT_CAST typeOperand=androidx.compose.runtime.Ambient<T of androidx.compose.runtime.Ambient>
          CALL 'public final fun <get-AmbientContext> (): androidx.compose.runtime.ProvidableAmbient<android.content.Context> declared in androidx.compose.ui.platform.AndroidAmbientsKt' type=androidx.compose.runtime.ProvidableAmbient<android.content.Context> origin=GET_PROPERTY

	at org.jetbrains.kotlin.backend.jvm.codegen.FunctionCodegen.generate(FunctionCodegen.kt:53)
	at org.jetbrains.kotlin.backend.jvm.codegen.ClassCodegen.generateMethodNode(ClassCodegen.kt:296)
	at org.jetbrains.kotlin.backend.jvm.codegen.ClassCodegen.generateMethod(ClassCodegen.kt:313)
	at org.jetbrains.kotlin.backend.jvm.codegen.ClassCodegen.generate(ClassCodegen.kt:135)
	at org.jetbrains.kotlin.backend.jvm.codegen.ClassCodegen.generate$default(ClassCodegen.kt:117)
	at org.jetbrains.kotlin.backend.jvm.JvmBackendFacade.doGenerateFilesInternal$backend_jvm(JvmBackendFacade.kt:153)
	... 38 more
Caused by: org.jetbrains.kotlin.codegen.CompilationException: Back-end (JVM) Internal error: Couldn't inline method call '<get-current>' into
@androidx.compose.runtime.Composable public fun foo(): kotlin.Unit defined in fr.acinq.phoenix.android.utils in file logger.kt
@Composable
fun foo() {
    val context = AmbientContext.current
}
Cause: Not generated
File is unknown
The root cause java.lang.IllegalStateException was thrown at: org.jetbrains.kotlin.codegen.inline.InlineCodegen$Companion.getCompiledMethodNodeInner(InlineCodegen.kt:581)
	at org.jetbrains.kotlin.codegen.inline.InlineCodegen.throwCompilationException(InlineCodegen.kt:104)
	at org.jetbrains.kotlin.codegen.inline.InlineCodegen.performInline(InlineCodegen.kt:149)
	at org.jetbrains.kotlin.backend.jvm.codegen.IrInlineCodegen.genCall(IrInlineCodegen.kt:158)
	at org.jetbrains.kotlin.backend.jvm.codegen.ExpressionCodegen.visitCall(ExpressionCodegen.kt:432)
	at org.jetbrains.kotlin.backend.jvm.codegen.ExpressionCodegen.visitCall(ExpressionCodegen.kt:102)
	at org.jetbrains.kotlin.ir.expressions.impl.IrCallImpl.accept(IrCallImpl.kt:74)
	at org.jetbrains.kotlin.backend.jvm.codegen.ExpressionCodegen.visitVariable(ExpressionCodegen.kt:544)
	at org.jetbrains.kotlin.backend.jvm.codegen.ExpressionCodegen.visitVariable(ExpressionCodegen.kt:102)
	at org.jetbrains.kotlin.ir.declarations.impl.IrVariableImpl.accept(IrVariableImpl.kt:74)
	at org.jetbrains.kotlin.backend.jvm.codegen.ExpressionCodegen.visitStatementContainer(ExpressionCodegen.kt:379)
	at org.jetbrains.kotlin.backend.jvm.codegen.ExpressionCodegen.visitBlockBody(ExpressionCodegen.kt:383)
	at org.jetbrains.kotlin.backend.jvm.codegen.ExpressionCodegen.visitBlockBody(ExpressionCodegen.kt:102)
	at org.jetbrains.kotlin.ir.expressions.IrBlockBody.accept(IrBody.kt:54)
	at org.jetbrains.kotlin.backend.jvm.codegen.ExpressionCodegen.generate(ExpressionCodegen.kt:215)
	at org.jetbrains.kotlin.backend.jvm.codegen.FunctionCodegen.doGenerate(FunctionCodegen.kt:125)
	at org.jetbrains.kotlin.backend.jvm.codegen.FunctionCodegen.generate(FunctionCodegen.kt:51)
	... 43 more
Caused by: java.lang.IllegalStateException: Couldn't obtain compiled function body for org.jetbrains.kotlin.ir.descriptors.IrBasedPropertyGetterDescriptorWithContainerSource@5096f940
	at org.jetbrains.kotlin.codegen.inline.InlineCodegen$Companion.getCompiledMethodNodeInner(InlineCodegen.kt:581)
	at org.jetbrains.kotlin.codegen.inline.InlineCodegen$Companion.createInlineMethodNode$backend(InlineCodegen.kt:545)
	at org.jetbrains.kotlin.codegen.inline.InlineCodegen.performInline(InlineCodegen.kt:140)
	... 57 more

BenjO

12/07/2020, 3:55 PM

👋 I'm having reeeeeally slow composable preview rendering time in Android Studio. Between 30s if I'm lucky, up to 1min. I'm using • Windows 10 (cpu 8 cores, 24GB RAM) • Android Studio Arctic Fox 2020.3.1 Canary 2 • Android Gradle Plugin 7.0.0-alpha02 • Kotlin to 1.4.20 • Compose version to 1.0.0-alpha08. I disabled my antivirus and added rules to exclude project files, but still no luck... I'm previewing one composable at a time. I tested few weeks ago on a MacBook, it was much much faster. Performance might not be a major concern right now, but if someone has a clue on how to improve it a bit, I take it !

zsperske

12/07/2020, 5:48 PM

Are there any known issues with

vectorResource

? This asset draws as white when placed in the

TopAppBar.navigationIcon

of a

Scaffold

Copy code

<vector xmlns:android="<http://schemas.android.com/apk/res/android>"
    android:width="24dp"
    android:height="24dp"
    android:viewportWidth="24"
    android:viewportHeight="24">
  <path
      android:pathData="M12.1523,2C9.2617,1.957 6.6484,3.1563 4.7969,5.0898L2.8555,3.1445C2.6602,2.9531 2.3398,2.9531 2.1484,3.1445C2.0469,3.2422 2,3.3711 2,3.5L2,8C2,8.5508 2.4492,9 3,9L7.5,9C7.6289,9 7.7539,8.9492 7.8555,8.8555C8.0469,8.6602 8.0469,8.3398 7.8555,8.1484L6.2188,6.5078C8.0273,4.6016 10.75,3.5703 13.6914,4.1758C16.7656,4.8125 19.2305,7.3008 19.8398,10.3789C20.8516,15.5 16.9414,20 12,20C7.8828,20 4.4805,16.8711 4.0469,12.8633C3.9922,12.3672 3.5625,12 3.0625,12C2.4609,12 1.9961,12.5234 2.0625,13.1211C2.6211,18.1094 6.8672,22 12,22C18.1367,22 23,16.4453 21.8242,10.0977C21.0781,6.0742 17.8164,2.8594 13.7891,2.1563C13.2344,2.0586 12.6875,2.0117 12.1523,2.0039ZM12,6C11.4492,6 11,6.4492 11,7L11,12C11,12.2656 11.1055,12.5195 11.293,12.707L13.5859,15C13.9766,15.3906 14.6094,15.3906 15,15C15.3906,14.6094 15.3906,13.9766 15,13.5859L13,11.5859L13,7C13,6.4492 12.5508,6 12,6ZM12,6"
      android:fillColor="#3498DB"
      android:fillType="nonZero"
      android:strokeColor="#00000000"/>
</vector>

frankelot

12/07/2020, 6:13 PM

Quick question, I want to have a layout where children views can place themselves wherever they want (x y relative to the parent layout)… not sure how to acomplish this in #Compose 🤔 Tried creating a custom layout and using:

Copy code

placeable.placeRelative(x = 0, y = 0)

but I don’t have a way of asking the view where it wants to be placed

Daniele B

12/07/2020, 6:22 PM

New slide for my presentation, trying to describe the “coupling” between ViewModel and UI, in both Imperative and Declarative UIs

Nat Strangerweather

12/07/2020, 7:23 PM

is it possible to have modifiers under certain conditions only? For instance, here: is it possible to have modifiers under certain conditions only? For instance, here:

Card(

Modifier

.clickable(indication = null, onClick = {}

I want my card to be clickable only if the "isEnabled" Boolean is true. Something like

.if (isEnabled) clickable()

...

Val Salamakha

12/07/2020, 9:19 PM

Does “kotlin 1.4.21-release-Studio4.2-1” support compose?

zsperske

12/07/2020, 9:23 PM

Does anyone know where I can find the samples referenced in the documentation? things like

Copy code

androidx.ui.material.samples.FancyIndicator

Sam

12/07/2020, 9:38 PM

Hi, I have a brand new compose

alpha08

app from the latest android studio arctic fox canary 2 project template, the only code is this:

Copy code

Column(Modifier.fillMaxSize()) {
    Text("title")
    ScrollableColumn {
        Text("message")
    }
    val text = remember { mutableStateOf(TextFieldValue()) }
    OutlinedTextField(
        value = text.value,
        onValueChange = { text.value = it },
        placeholder = { Text(text = "Watch me animate...") },
        modifier = Modifier.fillMaxWidth().padding(horizontal = 16.dp, vertical = 8.dp)
    )
}

My question is, why is it that when I focus the software keyboard on a Pixel 4a device, does everything get shifted up so that the keyboard stays in view? How can I disable this behavior so that I have more fine grained control, for example using

accompanist

lib for insets?

zsperske

12/07/2020, 10:06 PM

Can you use compose navigation in a project that is already using the navigation component? Trying to follow the navigation guide and not seeing the method I need.

Copy code

implementation("androidx.navigation:navigation-fragment-ktx:2.3.2")
implementation("androidx.navigation:navigation-ui-ktx:2.3.2")
implementation("androidx.navigation:navigation-compose:1.0.0-alpha03")

zsperske

12/08/2020, 1:59 AM

Is it normal to have nested

NavHost

s? Or should the entire graph be defined at the top level?

tylerwilson

12/08/2020, 11:36 AM

Simple question, I think: how can I set the offset of an item as a percentage of the total width. There is a fillMaxWidth that takes a fraction, so something like offsetMaxWidth(0.5) ?

jaqxues

12/08/2020, 12:15 PM

I want to draw a tree graph, how should I procede? I doubt putting everything into a single Canvas would work well, so I suppose a custom Layout, where I can put the Node Composables? But what would be the best way to keep track of what is connected to what?

zoha131

12/08/2020, 3:21 PM

How to observe scroll position of a

ScrollableColumn

Heba

12/08/2020, 3:29 PM

Hello everyone 🙂, Im wondering if compose is safe to be used in production apps (by spring 2021) , My concerns are not about api changes but about stability, any help will be appreciated

🚫 4

codeslubber

12/08/2020, 5:31 PM

Being able to run Previews in the emulator is really cool. But we noticed that once we converted a module to a Library, that became impossible? is there a solution to that? (other than copy/paste it into the app source space)?

zsperske

12/08/2020, 6:08 PM

Does anyone else wish cmd+o would find your composable functions? i've started adding empty classes with the same name as my composables at the top of the file

Sam

12/08/2020, 6:34 PM

What’s going on with the compose app deploy-to-device bug? I’m counting 9 separate reports here about the same problem, it’s really killing productivity and there isn’t anyone providing an ETA on the fix: https://issuetracker.google.com/issues?q=componentid:192745%20status:open

ziv kesten

12/08/2020, 6:55 PM

What is the proper way to expose paging from a viewModel to a composable?. Ideally I would expose a paging source from the view model and create the pager in the composable, with remember. However this doesn't seem to work (using stateFlow) Since the pager is not calling the load function of the mediator.

zsperske

12/08/2020, 9:25 PM

Has anyone worked out a nice pattern for localizing strings?

sindrenm

12/08/2020, 10:17 PM

Any downsides to

operator fun <T> State<T>.component1(): T = value

? Being able to destructure a

State

is very useful when the value of the

State

is nullable. Such as:

Copy code

val (content) = viewModel.content.collectAsState()

if (content != null) {
    SomeContent(content)
} else {
    MissingContent()
}

(Using a

StateFlow

here, but applies for any other way of retrieving a

State

as well.) I don't find the property delegate very useful in this situation, as smart-casting can't be done in that case (custom getter and all that). Is this something that would make sense to even add to the standard lib?

Noé Casas

12/08/2020, 11:37 PM

Is it possible to set a

TextField

’s text vertical alignment to “top”? How? By default the text is in the middle. Setting

Modifier.align(<http://Alignment.Top|Alignment.Top>)

does not help.