A data class cannot extend another data class but it can extend a normal open class. I was expecting this wouldn't work. 🤨 Why not allow data class to extend another data class? What am I missing?

Shouldn't there be a function with following signature?

StateFlow<T>.map(.....) : StateFlow<R>

Since the mapping flow is a state flow it should already have an initial value right? Then why not just map it directly to a state flow? And if I wish to define such an extension function, how should I do that?

Greetings, Question About android :android-10: design with xml: when using a CoordinatorLayout and, inside it, a FragmentContainerView and a BottomnavigationView, it shows that the layout appears empty and only the bottomNavigationView appears, is there any property of the coordinatorlayout or fragmentcontainerview that adjusts this mess? In the windows that are associated with the bottomNav, there is a NestedScrollView as the main component and a child of the ConstraintLayout

Does anyone used

ktor-client-auth

in KMM ? Is it suppose to work for Authentication Code Flow + PKCE on Android and iOS ?

I'm using preferences datastore (sharedpref replacement) and it only seems to support a Flow and it doesn't support a synchrounous api. I have an app setting that has to be read super early in the app (basically it's the first thing that has to be read in the app for initialization). Is there an easy way to do this with datastore, or should I just look up how to convert a Flow into a synchronous single call?

Hi all! I’m looking to call a REST API from an android app with coroutines. I could use some pointers to the best practices for how to call and propagate a JSON response from the api elsewhere in the application (business logic) which in turn will update the UI? Also, my more specific question is can I (and how) block the IO thread waiting for a synchronous HTTP request to return? How would I set this up from the caller? Thanks

Am I missing something in my app made with Jetpack Compose? At start my app has a button to get URI with OpenDocumentTree() Then after getting uri to required directory, I do all the procedure like showing images, videos and doing operation such as saving and sharing. So in short: Button-> Get URI from OpenDocumentTree()-> Show Images and Videos, Do operations-> App closed-> Repeat... What I want: Once I got uri from OpenDocumentTree() I want to just load images & video from there. And provide a refresh button to just load newly added images or videos. But I think I'm missing some logic of some sort.

Hello everyone, can anyone help me with an issue with hilt and modularised apps? So far my app has 3 modules: app (the default one), di and network. The idea here is putting hilt related dependencies in the DI module, so consumer modules can use this DI library without explicitly declaring the dependencies in the module's gradle file.

I am trying to run the epoxy (https://github.com/airbnb/epoxy) sample app but getting this error..how to resolve this? Java Version: OpenJDK Runtime Environment Temurin-11.0.12+7

ava.lang.IllegalAccessError: class org.jetbrains.kotlin.kapt3.base.KaptContext (in unnamed module @0x75446cc6) cannot access class com.sun.tools.javac.util.Context (in module jdk.compiler) because module jdk.compiler does not export com.sun.tools.javac.util to unnamed module @0x75446cc6
	at org.jetbrains.kotlin.kapt3.base.KaptContext.<init>(KaptContext.kt:28)
	at org.jetbrains.kotlin.kapt3.KaptContextForStubGeneration.<init>(KaptContextForStubGeneration.kt:40)
	at org.jetbrains.kotlin.kapt3.AbstractKapt3Extension.contextForStubGeneration(Kapt3Extension.kt:287)
	at org.jetbrains.kotlin.kapt3.AbstractKapt3Extension.analysisCompleted(Kapt3Extension.kt:171)
	at org.jetbrains.kotlin.kapt3.ClasspathBasedKapt3Extension.analysisCompleted(Kapt3Extension.kt:102)
	at org.jetbrains.kotlin.cli.jvm.compiler.TopDownAnalyzerFacadeForJVM.analyzeFilesWithJavaIntegration$invokeExtensionsOnAnalysisComplete(TopDownAnalyzerFacadeForJVM.kt:112)
	at org.jetbrains.kotlin.cli.jvm.compiler.TopDownAnalyzerFacadeForJVM.analyzeFilesWithJavaIntegration(TopDownAnalyzerFacadeForJVM.kt:122)
	at org.jetbrains.kotlin.cli.jvm.compiler.TopDownAnalyzerFacadeForJVM.analyzeFilesWithJavaIntegration$default(TopDownAnalyzerFacadeForJVM.kt:86)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler$analyze$1.invoke(KotlinToJVMBytecodeCompiler.kt:252)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler$analyze$1.invoke(KotlinToJVMBytecodeCompiler.kt:243)
	at org.jetbrains.kotlin.cli.common.messages.AnalyzerWithCompilerReport.analyzeAndReport(AnalyzerWithCompilerReport.kt:113)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.analyze(KotlinToJVMBytecodeCompiler.kt:243)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules$cli(KotlinToJVMBytecodeCompiler.kt:90)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules$cli$default(KotlinToJVMBytecodeCompiler.kt:56)
	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:92)
	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:412)
	at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:112)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileIncrementally(IncrementalCompilerRunner.kt:358)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileIncrementally$default(IncrementalCompilerRunner.kt:300)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileImpl$rebuild(IncrementalCompilerRunner.kt:119)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileImpl(IncrementalCompilerRunner.kt:170)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compile(IncrementalCompilerRunner.kt:81)
	at org.jetbrains.kotlin.daemon.CompileServiceImplBase.execIncrementalCompiler(CompileServiceImpl.kt:607)
	at org.jetbrains.kotlin.daemon.CompileServiceImplBase.access$execIncrementalCompiler(CompileServiceImpl.kt:96)
	at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:1658)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:567)
	at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:357)
	at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:200)
	at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:197)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:691)
	at java.rmi/sun.rmi.transport.Transport.serviceCall(Transport.java:196)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:587)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:828)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:705)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:704)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
	at java.base/java.lang.Thread.run(Thread.java:831)

Hi! Anybody could spot why the onSharedPreferenceListener is never called in the code in the thread?

not kotlin but I'm wondering if anyone else is having trouble downloading Android Studio from the download page for M1 Macs

Does anyone get a "Can't install" message for their android apps? Not sure what's causing this issue

Hi. I’ve just updated app to Kotlin 1.6.0. Everything works except of Espresso tests:

Caused by: java.lang.ClassNotFoundException: Didn't find class "androidx.compose.ui.platform.InfiniteAnimationPolicy$DefaultImpls" on path: DexPathList[[zip file "/system/framework/android.test.mock.jar", zip file "/system/framework/org.apache.http.legacy.boot.jar", zip file "/system/framework/android.test.runner.jar", zip file "/data/app/com.xxx.test--U04pIcan0sKvbMH_f3aCQ==/base.apk", zip file "/data/app/com.xxx-MvGPQxMJ3GAEvifVyCdW8w==/base.apk"],nativeLibraryDirectories=[/data/app/com.xxx.test--U04pIcan0sKvbMH_f3aCQ==/lib/x86, /data/app/com.esky-MvGPQxMJ3GAEvifVyCdW8w==/lib/x86, /data/app/com.xxx.test--U04pIcan0sKvbMH_f3aCQ==/base.apk!/lib/x86, /data/app/com.xxx-MvGPQxMJ3GAEvifVyCdW8w==/base.apk!/lib/x86, /system/lib]]
	at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
	... 39 more

I’m using latest versions of compose libs:

1.1.0-beta04

Any ideas?

hello guys, is there any good way of handling multiple load states in viewmodel using flows?

Kotlin 1.6.10 released, but as of versions page there is no plugin for 2021.1.1 https://plugins.jetbrains.com/plugin/6954-kotlin/versions. Does it mean Android Studio Bumblebee will not receive it ?

nice illustration @Ameen Essa

Hi, im trying out

loadStateFlow

to manage my android activity load states and do not understand how to achieve the desired effect heres my code...

Hello all , I have a problem in debug apk When QA team need to install my apk This alert appear What is problem ?

Hi, Everyone Can anyone please explain why we need SingleLiveEvent with example i didn`t understand, i have seen the same implementation working with MutableLiveData and SingleLiveEvent ?

In this commit (https://github.com/erikhuizinga/2021-12-16-developer.android.com-jetpack-guide-ui-layer-events/commit/9503f634bea5d9f6ab971c6a4814c1944bf9db4c) I'm trying to observe the state (

StateFlow<State>

) in two fragments in the same activity. As can be seen in the logcat at runtime, only one of the two fragments receives new state values. I don't understand why, because a

StateFlow

should emit to all collectors, not just one. Why is that? What am I doing incorrectly?

I have cocoapods installed on my mac. Then i run kmm project in android studio i always get Cannot run program “pod”java.io.IOException: error=2, No such file or directory How can i resolve this? Thanks!

Can someone help me fully understand the problem?

What Kotlin version will stop supporting kotlin-android-extensions / synthetics ?

Anyone with basic knowledge about Firebase database (firestore) that can help me with one simple thing that I'm stuck? Will be less than 5 min for sure because I'm not used to use this db...

Hello Friends, I am working with Ktlint custom ruleset . I have written one custom rule. When i try to execute that rule then it will execute successfully without any error, but it should show error. Here is my CustomRule class

class CustomRule : Rule("FunctionNamingConvention") {
    override fun visit(
        node: ASTNode,
        autoCorrect: Boolean,
        emit: (offset: Int, errorMessage: String, canBeAutoCorrected: Boolean) -> Unit
    ) {
     
        if (node.elementType == VAR_KEYWORD) {
            emit(node.startOffset, "Unexpected var, use val instead", false)
        }
    }
}

Here is i have register that class.

class CustomRuleSetProvider : RuleSetProvider {
    override fun get(): RuleSet {
        return RuleSet("FunctionNamingConvention", CustomRule())
    }
}

Any one have idea about this?

Hello everyone, can anyone help me with this test case?

@Test
fun `Should get images and add to list`() = runBlockingTest {
    coEvery { getPhotosUseCase(any()) } returns flow { emit(Source.Success(GetImagesTestData.DOMAIN_RESPONSE)) }

    //viewModel.getImages()

    coVerify(exactly = 1) { getPhotosUseCase(any()) }
    confirmVerified(getPhotosUseCase)
    assertEquals(GetImagesTestData.DOMAIN_RESPONSE, viewModel.photos.toList())
}

This test keeps failing because it says that viewModel.photos.ToList() is empty, therefore not equal to the expected result. The test will only pass if call the viewModel.getImages() method inside the test block, but this method is already being called in the init{} block of the viewModel. Can anyone help me understand why this is happening?

Hello friends, there is a working project, but not a single commit has been made for 1 year. When I run it after 1 year, I get certain errors like java.lang.IndexOutOfBoundsException: Index: 0, Size: 0. The size of list is coming from server appears to be 0 What I want to know is is there a solution that I can do myself or it is a server related problem.

Hello, i have on question regarding optional parameters: for example i have a method called

fun foo(val a: Int = 0)

is it possible to have some conditional calling of "foo" like?

val dummyBoolean = true
foo(if(dummyBoolean) 1 else <use default value>)

Hey everyone, Anyone here working with Material You or have some experience with it? Need some help.