Quick question about fragments (warning: I am a complete beginner). is it possible to perform multiple actions on a single fragment? For example, l've created fragments 1, 2, 3 and 4. Fragment 1 has one button which let's me navigate to fragment 2. Fragment 2 has two buttons, one is meant to allow me to return to Fragment 1 while the other is meant to take me to the next fragment (Fragment 3)...and Fragment 3 and 4 is similar to Fragment 2. I was able to move from Fragment 1 to 2. In Fragment 2, only one of the buttons worked correctly. The button that worked only allowed me to return to Fragment 1, however, every time I click on the button that's meant to take me to Fragment 3, my app crashes. My question is, are fragments only meant to allow one function per frame?......can one fragment not hold many functions e.g. having multiple buttons on one Fragment that does different things? All the videos I've seen online so far are only showing examples of - "One fragment, one function, one direction". Any feedback will be appreciated.

This message was deleted.

Could you please to help me resolve this. I’m looking for a flow can adapt the requirement: Every single should be collect only one time, the value will be exist until it has been consumed and can be apply the filter. I’m have try with channel, but it have no function to filter value but keep it in the queue value if not match the conditional For example:

val numberChannel = Channel<Int>(capacity = Channel.BUFFERED)
GlobalScope.launch {
    numberChannel.send(0)
    numberChannel.send(1)
    numberChannel.send(2)
    numberChannel.send(3)
    numberChannel.send(4)
    numberChannel.send(5)
    numberChannel.send(6)
    numberChannel.send(7)
}

GlobalScope.launch {
    delay(1000)
    numberChannel.receiveAsFlow()
        .filter { it % 2 == 0 }
        .collectLatest {
            Timber.d("------Collect1: $it") //expect print: 0,2,4,6
        }
}

GlobalScope.launch {
    delay(2000)
    numberChannel.receiveAsFlow()
        .collectLatest {
            Timber.d("------Collect2: $it")  //expect print: 1,3,5,7
        }
}

This message was deleted.

Does anyone know here if stopping a staged release in the Play Console at say 10% and subsequently creating a new staged release for the same percentage, will ensure that the exact same group of users which were part of the 10%, get the update first? Or if this is not the right place to ask, where else could I (besides SO)?

What does accessors mean in kotlin? Does it imply both getter & setter or it only means getter? Also, can anyone please explain this in the image below🙏

Good Morning guys, What is the best approach to find three items in single list. I tried some code and working fine. I want to know is there any better approach for this

val completeEvent = events?.lastOrNull { events -> events.status == "complete" }
val activeEvent = events?.find { events -> events.status == "active" }
val futureEvent = events?.firstOrNull { events -> events.status == "future" }

ApiResponse

"Events": [{
			"title": "Test 1",
			"status": "complete"
		}, {
			"title": "Test 2",
			"status": "complete"
		}, {
			"title": "Test 3",
			"status": "complete",
		}, {
			"title": "Test 4",
			"status": "complete"
		}, {
			"title": "Test 5",
			"status": "complete"
		}, {
			"title": "Test 6",
			"status": "active"
		}, {
			"title": "Test 7",
			"status": "future"
		}, {
			"title": "Test 8",
			"status": "future"
		}]

Hi everyone, I want to run socket.io in background even app closed. One way is that start a foreground service but issue is that it display permanent notification to the user which is quite awkward. Thanks

Hey guys, anyone know any release site, in which I can find the android gradle version for intellij. I know latest intellij supports 7.0.4 in android-gradle. thanks

Has anyone here experience with uploading images/files to the server using Retrofit or OkHttp? I’m wondering what is the best solution for that in 2022 using Kotlin. There are a lot answers on that in the internet but most of them are copying the content from the Uri to a File and then use this file to create the requestBody. But then there are also people like blackapps and commonware who commend under a lot of stackoverflow questions that it’s not recommended to work with Files when there is a Uri that can do everything. Here commonware explained how to create an InputStream RequestBody using the Uri in Kotlin: https://commonsware.com/blog/2020/07/05/multipart-upload-okttp-uri.html unfortunately this is not working for me: https://stackoverflow.com/questions/72307214/upload-image-from-uri-to-retrofit-s3-signed-url-not-working I really would love to know what you guys would do? What is the best approach in 2022 using Kotlin (and Jetpack compose)? Is copying the file to the internal storage and deleting it after upload still a good approach? It’s really difficult to find answers to that on Google, most solutions are written in Java and probably outdated. I also saw the approach of just calling .toFile() on that Uri but this seems to throw an error

Error: java.lang.IllegalArgumentException: Uri lacks 'file' scheme: <content://media/external/images/media/54545>

Anyone here using Kotlin DSL over Groovy here? Has build performance of Kotlin DSL improved?

object Extensions{
    
    fun TextUtils.checkEmpty(str: String?): String? {
        if (!TextUtils.isEmpty(str)) {
            return str
        } else {
            return null
        }
    }
    
}

I have written this but not able to access this method. What is getting wrong here ??

try

fun String.checkEmpty(str: String?): String? {
    if (!TextUtils.isEmpty(str)) {
        return str
    } else {
        return null
    }
}

Hi Guys, Needed help to figure out the issue, I have updated Android Studio to chipmunk after that I am getting this Kotlin DSL issues in kotlin scripts. it’s compiling and building with no issues,

Hello All, will this channel also has Jetpack Compose support ?

I see many users, but I don’t understand the benefits of Either. What is the difference between Either and Pair in kotlin? https://arrow-kt.io/docs/apidocs/arrow-core/arrow.core/-either/.

Hi folks! 👋 Imagine a list A

[{id: 1, isSomething: false},{id: 2, isSomething: false}]

and list B

[{id: 1, isSomething: true}]

Is there an easy nice clean way in kotlin to merge the two lists so it ends up favoring list B ending up giving me

{id: 1, isSomething: true},{id: 2, isSomething: false}]

Hi Folks, Have anyone got experience with accessing/listening the Android’s Unit & Instrumented tests created with JUnit4 framework in Real-time? I have tried the approach of using custom runner but it needs to be specified as annotation in tests which is not what I prefer to do, also it doesn't work well with Instrumented tests.

Has anyone experienced a missing MainDispatcher only manifesting in release builds distributed via google play?

Hi, shouldn’t this be allowed? _*screenshot_1*_ using the same generic type works _*screenshot_2*_ just fine, but using a child generic type doesn’t and throws an error anyone got an idea of how to fix it? or another way of perform something like this?

I'm seeing a compilation issue for

Task :*****App:compileGoogleReleaseKotlin FAILED

Unresolved reference: viewModels

This is the

by viewModels()

code. The debug build compiles successfully, so I'm perplexed by the release build issue. Any ideas?

HI Guys, can you please suggest how to solve below error.

Hey guys. Is this channel adequate for questions about Gradle?

Hey. I noticed something really strange today. I’m not sure but it might be somehow related with macOS 12.4 update or Kotlin 1.6.21 update I made recently. Whenever I change the code in my project (e.g. a log message) and use “Run” option in Android Studio (Bumblebee but Chipmunk didn’t help), the change I made is not reflected in the app. It works when I run

./gradlew :app:installDebug

though, so I thought that it might be related with Gradle’s file system watching not working correctly (I’m on 7.4.2), therefore I disabled it in

gradle.properties

but it didn’t help at all. Any clues? EDIT: How is this “not Kotlin”? Perhaps it’s a problem with the Kotlin compiler/plugin not recompiling the sources after they are changed?

Is there a

@IntRange

annotation for kotlin which I can use in kotlin only module? @IntRange works at compilation time right?

hello! does anyone know how to add ktor backend module to android+ios multiplatform project (the one that android studio generates)? any help appreciated, thanks

I have some conversion of a hex string into a UByteArray via:

val test = chunked(2)
        .map { it.toInt(16).toUByte() }
    val test2: UByteArray = test.toUByteArray()

when i debug those values, the test is an arrayList of UByte (correct), but the test2 value shows in the debugger thats an byte[] instead of ubyte[]. is that just an bug in the debugger because its experimental? i cannot find an answer somewhere

I have written a

whenNotNull

function:

inline fun <T : Any, R> whenNotNull(input: T?, callback: (T) -> R): R? = input?.let(callback)

usage:

override fun onReceive(context: Context?, intent: Intent?) {
  whenNotNull(intent) {
    it.someAction()
  }
}

I have often problems with shadowed variable names, e.g. I cannot write:

override fun onReceive(context: Context?, intent: Intent?) {
  whenNotNull(intent) { intent -> // shadowed
    intent.someAction()
  }
}

Is there some construct to recognize that

intent

is not null within the

callback

block, so I can write:

override fun onReceive(context: Context?, intent: Intent?) {
  whenNotNull(intent) {
    intent.someAction()
  }
}

I have enabled some static analyzer tools which complain about the "it". I know I can just write

whenNotNull(intent) { _intent -> }

but I'm curious if there is some Kotlin construct which targets this case.

Hello. I’m trying to combine multiple objects into one

fun <A, B>LiveData<A>.combine(
    vararg other: LiveData<*>,
    combiner: (/*Don't know*/) -> B
) {
    val result = MediatorLiveData<B>()
    other.forEach { liveData ->
        result.addSource(liveData) { 
            if (other.toList().all { it.value != null }) {
                result.postValue(combiner(other))
            }
        }
    }
}

usage :

fun a() {
    MutableLiveData<Int>().combine2(MutableLiveData<Boolean>()) { entry1, entry2, etc ->
        
    }
}

Do you have any ideas ?