Create multiple object lists from one, based on an object parameter in Kotlin I Have a list of object with an Int attribute, like this: List id: 1 id: 1 id: 2 id: 2 id: 3 and i want to create different list based on that attribute, like this: List A List B List C id: 1 id: 2 id: 3 id: 1 id: 2 i found some ways to do it but i wanted to know if there was an efficient way, maybe using some method that kotlin already provide.

It returns null from the first. 2nd time getting the data I think it's a sync problem but I don't know how to fix it. My goal is to return a value based on if query private fun useranddoctor(): String? { val collection = Firebase.firestore.collection("users") collection.get() .addOnSuccessListener { documentSnapshot -> for (document in documentSnapshot) { if (document.getString("kullaniciseviyesi") == "1" && document.getString("email") ==...

How can i to be notified from root components onclicks in child components without multiple class dependency in jetpack compose? My problem is that this onclick method or variable takes too many paths to get to where it will be used. Path of onclick (unwanted solution): ComposableClassWantedToNotifyOnclick(Root) -> MainContent -> NavigationGraph -> Screen(Child) Path of onclick (wanted solution): ComposableClassWantedToNotifyOnclick(Root) -> Screen(Child) How can i do that? Here my example (its unwanted solution, include multiple class dependency for notify onclick); *unrelated lines of code deleted, actual problem is...

Grouping and processing each list passes only with the first list I have a list of cars and each id of car can have multiple color values, i want to combine them such that each color object will have set of color options.. but when i run this with this input: cars -> { car1 (id1, color1), car2 (id2, color2)} i only get the first car, the second is not processed How can i achieve what i want? Can you please help me out? Flux.fromIterable(carItems) .groupBy { it.id } .flatMap { it.collectList().map { mapToCar(it) } } private fun mapToCar(cars:...

Post multipart via ktor-client I have to make a multipart request via ktor-client. Request method: suspend fun uploadPhoto(userId: String, bitmapPhoto: BitmapPhoto) { kotlin.runCatching { val response: HttpResponse = httpClient.submitFormWithBinaryData( url = BASE_URL.plus("$userId/${bitmapPhoto.name}"), formData = formData { append("file", bitmapPhoto.bitmap.toByteArray(), Headers.build {...

VSCode not recognizing function parameter fun sayHello(ObjectGreeted:String){ val msg = "Hello $ObjectGreeted" println(msg) } fun main() { sayHello(ObjectGreeted:"User") } The ObjectGreeted in main function is underlined Edit: This isn't a problem with Intellij but there's some problem with it so I prefer not to use it.

Putting Elements in MutableList of Kotlin fun main() { var list1 = mutableListOf() for(i in 0 until 5) { list1.set(i,i) } println(list1) } Above Code Gives Index 0 out of Bound for Length 0. What is the Mistake. How do i put elemnts in the MutableList using Index.

How can i work with flow inside repository android? I wrote code which works fine without kotlin flow, but i want to try kotlin flow and when i used it inside repository but somehow it is not even entering inside i could not find any solution since it is not throwing any error, it is just not entering inside function and i think it is because of flow collector. It is coming till repository but for repo it is not entering. class NewsRepositoryImpl(private val newsService: NewsService) : NewsRepository { override suspend fun getNews(search:...

Thread underneath coroutineScope does not stop i have an issue with stopping coroutine Thread. i don't have deep knowledge of Coroutines, correct me if i am wrong in any part, but i was not able to find the solution anywhere. The issue which i am facing is that when i call coroutineScope.cancel() it does not stop the thread underneath, the coroutine is being stopped and it does not keep on functioning but the thread underneath moves to WAITING state. The way i start my coroutine -> scope = CoroutineScope(...

Passing generic typed object between activities via intent In my application I am trying to pass a generic worker object (which is parcelable) between activities. However, when I get parcelableExtra from intent, it creates new instance of the worker. As you can see from the code, I assigned test variable to 10 then put it to bundle, when get it from new activity, it gives 15 as default value. Is there a way to pass same instance reference between activities? Put worker to intent: fun newIntent(context: Context, worker: PlayerVideoContentsWorker,...

Using a Map with Nullable Keys? (new to Kotlin) I am writing a function to log differences between two Lists, like so: fun logDifferences(booksOne: List?, booksTwo: List?, logEntryFactory: LogEntryFactory) { val booksOneByKey: Map = booksOne?.associateBy({ it.key }, { it }) ?: mapOf() val booksTwoByKey: Map = booksTwo?.associateBy({ it.key }, { it }) ?: mapOf() val allBookKeysSet: Set = booksOneByKey.keys.union(booksTwoByKey.keys) allJobKeysSet.forEach { val booksOne = booksOneByKey[it] val...

Add non null asserted hashmap kotlin I am getting the following error when adding a value to map var channelId: String? = null channelId can be updated anytime during the course of application val metaData = mutableMapOf() if (!channelId.isNullOrEmpty()) metaData["channel_id"] = channelId I get the error add non-null!! call I don't want want to use !!

Kotlin bring app from background to foreground Please 🙏 I am working on a android app using kotlin, I want to be able to bring my app from background to foreground when I press the back button, I have seen some solutions online but unfortunately they do not meet with the new standard of kotlin since there has been some changes

how can i put an 3d object in an android app? hello i'm developing an app and i'd like to know if is it possible to put an object 3D or an animated video in it! most precisely i've got a 3D model that i've made with blender and i'd like to insert it in ! If is it i'd like to know how

How to call form-data with key-value in rest request using Retrofit Android I want to send rest request in this specific format i.e. form-data with key="image" and value=selected file I am trying this way but it is not working in my case @Multipart @POST("dashboard/media") suspend fun upload(@Part("image") image: MultipartBody.Part): UploadMediaResponse

How to use compose outside of the view element (ie. Activity and Fragment)? We're experimenting with Jetpack Compose lib. So we're just trying it out by randomly adopting it into the existing Fragments. What we hate is that it adds huge chunks of code into our View elements (Activities and Fragments) which in our opinion looks horrible, and breaks the cleanness. We have failed to find any of the tuts or showcases where the layout is Compose(d) outside of the Activity and/or Fragment in the separate file, and then loaded into it/them externally. Any suggestions or...

Disable scrolling when interacting with the MpAndroidChart LineChart I have a linechart using the MPAndroidChart library and I'm using jetpack compose. The problem is I want to disable the vertical scrolling on the entire view when I'm interacting with the chart. I saw an example by doing this but it didn't work for me. I would call disableScrolling() in my onChartGestureListener. fun LazyListState.disableScrolling(scope: CoroutineScope) { scope.launch { scroll(scrollPriority = MutatePriority.PreventUserInput) { // Await indefinitely,...

Decouple multiple variable let in Kotlin I have a separate function that applies different gradient based on specified id, this function returns a compose Brush. When I call this function in my boxscore I have to wrap with let since it returns Brush?. This causes Android Studio to tell me the modifier must also be wrapped with the let keyword. How can I decouple this? gradient function fun appliedGradient(id: ScreenId): Brush? { return when (screen.id) { 12 -> Brush.linearGradient( colors =...

How to recognize default account picture in Google profile using One Tap Auth? When i'm using launcher to authenticate user into my app using Google's One Tap Auth API we are gettings user credentials: registerForActivityResult(ActivityResultContracts.StartIntentSenderForResult()) { result -> try { val credential = Identity.getSignInClient(requireContext()).getSignInCredentialFromIntent(result.data) } catch (exception: ApiException) { Timber.e(exception) } } And by using credential we can take...

CriteriaBuilder API cannot cast offset date time to date like in MySql I'm trying to get all entries between two dates using the criteria api (with kotlin). The date column is from type 'OffsetDateTime' with format 2022-04-04 173706.869813 and I'm trying to find dates between two params from type 'LocalDate' with format 2022-04-04. With MySql I cast this column as type 'date' in order to compare it: cast(r.audit_info_requested_at AS date) BETWEEN :from AND :to How is it possible to cast 'OffsetDateTime' to 'LocalDate' like that in Criteria Api? These two...

Testcontainers: build docker image inside testcontainer I'm creating some tests for my CI/CD service with testcontainers. One of the tests contains docker image building inside the testcontainer. It fails as it cannot access docker daemon. The question is how to share local docker daemon to testcontainer or how to run docker doemon inside of testcontainer in the easiest way?

Android custom keyboard fills display in landscape mode I make custom keyboard, based on Constraint layout. Looks like and in portrait mode it works fine but in landscape keyboard layout fills whole screen fullscreen mode of keyboard is turned off. What can be wrong?

The problem of the applicaion keep stopping I have faced the problem of my application always show keep stopping. I try to see the terminal and it show me the problem is not been initialized. However, I have found many ways but still cannot show it. Can somebody help me? Thank for your help Below are my original code which problem out : package com.example.assignment_mad import android.os.Bundle import androidx.fragment.app.Fragment import android.view.LayoutInflater import android.view.View import android.view.ViewGroup import...

Transform Kotlin List to certain size by padding or concatenating the last n elements I often need to either shorten or pad a List to a certain amount of entries. For that I use a function like this: fun List.compactOrPadEnd(size: Int): List { if (this.size < size) return this + List(if (this.size < size) size - this.size else 0) { "" } else return this.subList(0, size - 1) + this.subList(size - 1, this.size).joinToString("") } val list0 = emptyList() val list1 = listOf("A") val list2 = listOf("A", "B") val list3 = listOf("A", "B", "C") val list4 = listOf("A",...

Calling a kotlin Activity from a Java Activity is throwing a hilt exception NoClassDefFoundError I am calling Activity B which is written in kotlin from Activity A which is in Java. My project dependency injection is done using hilt and both the activities are annotated using @AndroidEntryPoint. But i am getting the below exception java.lang.NoClassDefFoundError: Failed resolution of: Lcom/test/app/Hilt_SectorLoginActivity; Is there anything I need to do with dependencies to make this work? Below is my hilt dependency def hilt_version = '2.40' implementation...

Programmatically enabling Airplane mode does not disable Mobile date and Bluetooth I want to turn on airplane mode through the code and turn off bluetooth, wifi and mobile data. First, execute this in the console: adb shell pm grant com.package.name android.permission.WRITE_SECURE_SETTINGS Second, turn on airplane mode from code: //Set radios cell,wifi,bluetooth witch will be off Settings.Global.putString(requireContext().contentResolver, Settings.Global.AIRPLANE_MODE_RADIOS,...

kotlin autowired spring beans in high order functions I have a high order kotlin function like this: fun findById(id:Long):User { return jdbcTemplate.query(...) } jdbcTemplate comes from a Spring context. I've tried to inject it but @Autowired doesn't work since I have no enclosing class (as I understood). What is the idiomatic way (Good way) to do it (inject a bean) in kotlin? thx.

com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type from String: not one of the values accepted for Enum class I'm upgrading a Spring Boot web service from Kotlin 1.4.32 to 1.5.0. // Before: kotlin("jvm") version "1.4.32" kotlin("plugin.spring") version "1.4.32" // After: kotlin("jvm") version "1.5.0" kotlin("plugin.spring") version "1.5.0" After upgrading and running the API, I get the following error: com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type

models.SeasonType

from String "Season": not one of the values accepted for Enum class: [NO_SEASON,...

Split string by first space before colon I would like to split a string of the following format by space a:a1 b:b1 c:c1 There is however one thing that makes it more difficult, eg. the expression to the right of the colon can have spaces itself. For example: The input is a string: "a:2 b:very complex word c:3" The output is list of strings: ["a:2", "b:very complex word", "c:3"] I would like to split only strings that has either a, b or c on the left of the colon. Other values are not allowed. For example: "a:2 badInput:4" or "a:2...

Fetch a String Resource with a different locale from a manually created context I need to get string-resources of particular locale depending on the language chosen by user. I created the function below for that purpose: fun getLocalizedString(requestedLocale: Locale, resourceId: Int, context: Context): String? { val newConfig = Configuration(context.resources.configuration) newConfig.setLocale(requestedLocale) val newContext = context.createConfigurationContext(newConfig) Log.d(TAG_NATIVE_LANG, "getLocaleStringResource: check new...