Hi 👋 Kotlin Community ❤️ I'm Mohamed

hi guys, is there anyway I know if the user changes the position of the phone from landscape to portrait and vice versa ?

How do we configure serialization now with Ktor 2.0 on an Android client? This example for previous versions is deprecated and no longer works:

client = HttpClient(Android) {
    install(JsonFeature) {
      serializer = KotlinxSerializer()
    }
}

The migration guide says to use the content negotiation plugin, but there are no examples of how to do this on Android that I can see.

Hello, ive followed these https://github.com/ma-za-kpe/compose-samples/tree/main/Jetsnack instructions on how to run a sample app in AS, but I get this error, can anyone help? FAILURE: Build failed with an exception. * What went wrong: com.intellij.openapi.externalSystem.model.ExternalSystemException (no error message) * Try:

Run with --info or --debug option to get more log output.

Run with --scan to get full insights.

* Exception is: com.intellij.openapi.externalSystem.model.ExternalSystemException: at org.jetbrains.plugins.gradle.model.ProjectImportAction.addBuildModels(ProjectImportAction.java:346) at org.jetbrains.plugins.gradle.model.ProjectImportAction.execute(ProjectImportAction.java:127) at org.jetbrains.plugins.gradle.model.ProjectImportAction.execute(ProjectImportAction.java:42) at org.gradle.tooling.internal.consumer.connection.InternalBuildActionAdapter.execute(InternalBuildActionAdapter.java:64) at org.gradle.tooling.internal.provider.runner.AbstractClientProvidedBuildActionRunner$ActionAdapter.runAction(AbstractClientProvidedBuildActionRunner.java:131) at org.gradle.tooling.internal.provider.runner.AbstractClientProvidedBuildActionRunner$ActionAdapter.fromBuildModel(AbstractClientProvidedBuildActionRunner.java:104) at org.gradle.tooling.internal.provider.runner.AbstractClientProvidedBuildActionRunner$ActionAdapter.fromBuildModel(AbstractClientProvidedBuildActionRunner.java:84) at org.gradle.internal.buildtree.DefaultBuildTreeModelCreator.fromBuildModel(DefaultBuildTreeModelCreator.java:57) at org.gradle.internal.buildtree.DefaultBuildTreeLifecycleController.lambda$fromBuildModel$1(DefaultBuildTreeLifecycleController.java:82) at org.gradle.internal.buildtree.DefaultBuildTreeLifecycleController.lambda$runBuild$4(DefaultBuildTreeLifecycleController.java:106) at org.gradle.internal.model.StateTransitionController.lambda$transition$6(StateTransitionController.java:166) at org.gradle.internal.model.StateTransitionController.doTransition(StateTransitionController.java:238) at org.gradle.internal.model.StateTransitionController.lambda$transition$7(StateTransitionController.java:166) at org.gradle.internal.work.DefaultSynchronizer.withLock(DefaultSynchronizer.java:44) at org.gradle.internal.model.StateTransitionController.transition(StateTransitionController.java:166) at org.gradle.internal.buildtree.DefaultBuildTreeLifecycleController.runBuild(DefaultBuildTreeLifecycleController.java:103) at org.gradle.internal.buildtree.DefaultBuildTreeLifecycleController.fromBuildModel(DefaultBuildTreeLifecycleController.java:74) at org.gradle.tooling.internal.provider.runner.AbstractClientProvidedBuildActionRunner.runClientAction(AbstractClientProvidedBuildActionRunner.java:43) at org.gradle.tooling.internal.provider.runner.ClientProvidedPhasedActionRunner.run(ClientProvidedPhasedActionRunner.java:53) at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35) at org.gradle.internal.buildtree.ProblemReportingBuildActionRunner.run(ProblemReportingBuildActionRunner.java:49) at org.gradle.launcher.exec.BuildOutcomeReportingBuildActionRunner.run(BuildOutcomeReportingBuildActionRunner.java:69) at org.gradle.tooling.internal.provider.FileSystemWatchingBuildActionRunner.run(FileSystemWatchingBuildActionRunner.java:119) at org.gradle.launcher.exec.BuildCompletionNotifyingBuildActionRunner.run(BuildCompletionNotifyingBuildActionRunner.java:41) at org.gradle.launcher.exec.RootBuildLifecycleBuildActionExecutor.lambda$execute$0(RootBuildLifecycleBuildActionExecutor.java:40) at org.gradle.composite.internal.DefaultRootBuildState.run(DefaultRootBuildState.java:128) at org.gradle.launcher.exec.RootBuildLifecycleBuildActionExecutor.execute(RootBuildLifecycleBuildActionExecutor.java:40) at org.gradle.internal.buildtree.DefaultBuildTreeContext.execute(DefaultBuildTreeContext.java:40) at org.gradle.launcher.exec.BuildTreeLifecycleBuildActionExecutor.lambda$execute$0(BuildTreeLifecycleBuildActionExecutor.java:65) at org.gradle.internal.buildtree.BuildTreeState.run(BuildTreeState.java:53) at org.gradle.launcher.exec.BuildTreeLifecycleBuildActionExecutor.execute(BuildTreeLifecycleBuildActionExecutor.java:65) at org.gradle.launcher.exec.RunAsBuildOperationBuildActionExecutor$3.call(RunAsBuildOperationBuildActionExecutor.java:61) at org.gradle.launcher.exec.RunAsBuildOperationBuildActionExecutor$3.call(RunAsBuildOperationBuildActionExecutor.java:57) at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:204) at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:199) at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66) at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59) at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:157) at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59) at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:53) at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:73) at org.gradle.launcher.exec.RunAsBuildOperationBuildActionExecutor.execute(RunAsBuildOperationBuildActionExecutor.java:57) at org.gradle.launcher.exec.RunAsWorkerThreadBuildActionExecutor.lambda$execute$0(RunAsWorkerThreadBuildActionExecutor.java:36) at org.gradle.internal.work.DefaultWorkerLeaseService.withLocks(DefaultWorkerLeaseService.java:270) at org.gradle.internal.work.DefaultWorkerLeaseService.runAsWorkerThread(DefaultWorkerLeaseService.java:119) at org.gradle.launcher.exec.RunAsWorkerThreadBuildActionExecutor.execute(RunAsWorkerThreadBuildActionExecutor.java:36) at org.gradle.tooling.internal.provider.ContinuousBuildActionExecutor.execute(ContinuousBuildActionExecutor.java:103) at org.gradle.tooling.internal.provider.SubscribableBuildActionExecutor.execute(SubscribableBuildActionExecutor.java:64) at org.gradle.internal.session.DefaultBuildSessionContext.execute(DefaultBuildSessionContext.java:46) at org.gradle.tooling.internal.provider.BuildSessionLifecycleBuildActionExecuter$ActionImpl.apply(BuildSessionLifecycleBuildActionExecuter.java:100) at org.gradle.tooling.internal.provider.BuildSessionLifecycleBuildActionExecuter$ActionImpl.apply(BuildSessionLifecycleBuildActionExecuter.java:88) at org.gradle.internal.session.BuildSessionState.run(BuildSessionState.java:69) at org.gradle.tooling.internal.provider.BuildSessionLifecycleBuildActionExecuter.execute(BuildSessionLifecycleBuildActionExecuter.java:62) at org.gradle.tooling.internal.provider.BuildSessionLifecycleBuildActionExecuter.execute(BuildSessionLifecycleBuildActionExecuter.java:41) at org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:63) at org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:31) at org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:58) at org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:42) at org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:47) at org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:31) at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:65) at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:37) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104) at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:39) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104) at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:29) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104) at org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:35) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104) at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.create(ForwardClientInput.java:78) at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.create(ForwardClientInput.java:75) at org.gradle.util.internal.Swapper.swap(Swapper.java:38) at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:75) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104) at org.gradle.launcher.daemon.server.exec.LogAndCheckHealth.execute(LogAndCheckHealth.java:55) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104) at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:63) at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:37) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104) at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:84) at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:37) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104) at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:52) at org.gradle.launcher.daemon.server.DaemonStateCoordinator$1.run(DaemonStateCoordinator.java:297) at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64) at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48) java.lang.NullPointerException

Hi, I am using the databinding and ViewModel with the repository pattern. My repository is exposing Flow that contains Result wrapper (indicates Loading, Success or Failure state). I could convert Flow to LiveData in ViewModel and observe (and handle) changes in a fragment, but since I am using databinding, it seems to me as one extra step. Therefore, is there a way how to safely collect flows in the ViewModel?

Hi, I wanted to know that in jetpack compose what is best way to optimize app for different Screen Size and dpi. In my current project in many place we are using Hard-coded DP and SP for defining layout Size or padding it is looking good in xhdpi device's but it becomes weird on smaller Devices. What is common way to solve this issue ??? I also did some search and only post I found is this. but I still wanted to know if there is any other or easier way to do it. https://proandroiddev.com/supporting-different-screen-sizes-on-android-with-jetpack-compose-f215c13081bd

Hi, I have a question regarding kotlin reflection. Does anyone have experience with (sealed class).sealedSubclasses? It always returns empty list if I apply obfuscation. Here’s the definition of classes

sealed class Data

object DataChild1 : Data()

object DataChild2 : Data()

and this is what I am trying to do:

val dataList = Data::class.sealedSubclasses.mapNotNull { it.objectInstance }

It works fine when I do not apply obfuscation.

Hi! Has anyone tested -Xcontext-receivers ? How do I enable it in the project?

hello How to test

StateFlow

if I use

stateIn

function then I can't test the

stateFlow

using

CoroutineTestRule

code in thread

Hi guys I used the Inuit library in my app in order to support multiple screen sizes but when I runed my app in multiple emulators and physical devices I found Inuit didn’t work properly with devices that have 480 screen width or more, what should I do ?

Hello, I need to sort a list of items by their prices. Sorting criteria is like this; • When sorting low to high, negative values need to always be before positive ones. The highest negative value being at the top and the highest green value being at the bottom • When sorting high to low, vice versa However, some items may have null price. Let’s say there is a negative trending item with null price so then all negative values that have non-null price need to come first before those that have null price. However, I can’t make it work in no way. I am using

nullsLast

with combination of

compareBy

but it is not working. Do you know what’s wrong? I tried;

sortedWith(nullsLast(compareBy { it.price }))

Hello ! I'm building a wear os app using compose, and using

SwipeDismissableNavHost

I've found that the swiping gesture is ignoring the

BackHandler

inside the composable. For example, if my nav graph is: A -> B -> C, and the swipe from C should redirect to A. I think I have to custom some behavior of the SwipeToDismissBox, but I'm not sure how. Any help is appreciated!

composable(
    Paths.WORD,
    arguments = listOf(navArgument("language") { defaultValue = "EN" })
){ navBackStackEntry ->
    BackHandler() { navController.navigate(Paths.HOME) }
    CompleteWord(navController, listState, completeWordViewModel, navBackStackEntry.arguments?.getString("language")!!.toLanguage())
}

Hi all, I am developing a Android library with one API exposed to encrypt a file. It returns the Flow. On the client app I have a list of files for which I need to encrypt. Can you please let me know how to chain all the calls for the list of files to be encrypted and run in parallel and get all the encrypted content once so that I can do the further processing.

Does anyone know if there is any work being done to "normalize" exceptions thrown by compose? I often find that while the stack traces themselves are mostly identical, the source will point to seemingly random things -

View

,

ViewGroup

, `BaseContinuationImpl`; usually things that are not directly related to whats actually causing the crash (which is often times a bug in compose, or me abusing it too much).

Which one is better? With

data class

or only

class

? I can only see the flexibility of using

copy()

fun when its data class. Any others pros/cons?

sealed class Errors(open val errorCode: String) {
    data class SomeError(
        override val errorCode: String
    ) : Errors(errorCode)
}

OR 

sealed class Errors(open val errorCode: String) {
    class SomeError(
        override val errorCode: String
    ) : Errors(errorCode)
}

Hello everyone, can someone help me out with this? Recently I was trying to implement a swipe like feature same as that in Tinder, so I chose to use a library for it https://github.com/yuyakaido/CardStackView. I also added the dependencies for it in the build,gradle(app) file. But I'm unable to access it inside my activity. It says "class could not be found" Please have a look at the screenshots below for reference

Hi there. I'm implementing a photo gallery with Jetpack Compose. The URI obtained from ContentResolver is passed to AsyncImage of Coil library. It works. However, every time the app is restarted, the images are reloaded, which causes a slight time lag in the display. I think caching the small thumbnail images needed for display to disk will speed up loading, but Coil's disk cache only works with HTTP Fetcher. Do you have a good idea? Should I implement a disk cache myself?

Hi guys, I have question as below:

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK or Intent.FLAG_ACTIVITY_CLEAR_TOP)

Can you guys explain why have “or” in the code as above?

Hi guys, I'm new to Kotlin (and coding in general) and I need help and guidance with some codes, I have created four activities on Android studio, and I am trying to use "Intent" to navigate from one activity to the other....My code worked well when moving from MainActivity to the second activity (Genderpg, but when I tried moving from the 2nd Activity to the third (AgePg02), the Emulator keeps returning me back to the Main activity.....here are images of my code...

hey 👋 such a pleasure to see y'all. i'm jun learning computer thingy. also am working for the graduation projects so joined here to find something to learn or to give help for others if i can!

This message was deleted.

Hi guys ❤️ I'm having an issue where show dialogFragment will disappear when from background re-open app. Is there a way the dialog doesn't go away when I reopen the app?

Hey, I want to use a background coroutine that calls some API each X seconds, where should I call it if I’m using few activities and view models and I want to start this job in one place and what should scope should I use? Thank you!

I wonder why Gradle Kotlin kts is not generated instead of groovy by default or at least to be an option to choose, also there are multiple errors in Android Studio Preview

hay, mates! i just wanted to ask this: i've started learning kotlin for the first time and this thing is not working. 😔 it was successfully working on my windows laptop, but it doesn't work on my macbook. my test app has a button and image view. when you click the button, then you'll see the gallery to pick your image file. after picking, the picked image will be shown on the image view. i have the same code that i wrote on my windows laptop and also, android studio says the build is successful without any error so i checked it on the emulator and it's not getting launched. 😢

OH PLUS, startActivityForResult and onActivityResult are deprecated. do i have any alternative? i googled it and read some articles on stackoverflow or something like that, but it didn't work with those clingy red underlines. 🥲 thank you… 🥹

Is this a bug? Why is it passing through the != null check eventhough it is null?

Is this considered to be executed on the main thread? How do you execute a coroutine on the background thread? to be clear

exchangeRepository.getExchanges()

is the call to the

suspend

function.