Proper use of mutableStateflow with Launcheffect in jetpack compose Hey I am working in MutableStateFlow in jetpack compose. I am trying to load spinner in next screen but it's not working. I am started learning jetpack compose. I didn't find the proper way in jetpack compose. I know MutableStateFlow in legacy way. I'll try explain what I am trying to do and what I want to achieve. I have a Button in the composable function, when I press the Button I am going into the viewModel and calling the api inside viewModelScope.launch. On that basis I have create a...

Add public getter in Java to protected field in Kotlin? I am doing some refactoring to a base class in Kotlin. It looks like the following: abstract class Base constructor (protected val prop: Int) { //... } I have an implementation in Java that wants to expose prop via a public getter. Is this possible? public class Impl extends Base { public Int getProp() { return prop; } } Causes an error like the following: Impl.java:269: error: getProp() in Impl cannot override getProp() in Base public Int getProp() {...

ViewPager2, FragmentStateAdapter, and conflict between pager's currentItem and adapter's createFragment's position parameter When implementing ViewPager2 and its associated FragmentStateAdapter for its contents in Kotlin, I ran into a weird issue: It has to do with the adapter's createFragment(position: Int) method and viewPager2's setCurrentItem(item: Int, smoothScroll: Boolean). Currently, implementing this for an adapter of size 2 items is fine, being able to start from position 0 of the view pager and able to change items as intended. The issue then comes from attempting to set the viewPager's currentItem value...

doOnTextChanged in infinite looping I'm trying to delete the last character in case it's a number in Android's EditText. However, I am falling into an infinite loop. The logic I'm implementing is the following: If the user types a number in the first 4 characters, the doOnTextChang event is called and validated if it's a number. After validation, it removes the last character. However, after removing the last character, it understands that it is to be called again, thus being in a loop and freezing the application. var isNum:...

Test Suite in kotest I don't know if I am missing something but I could not find anything that says how to do a test suite like in JUnit. Can someone help me? I saw that documentation offers grouping tests, but when I run from Gradle, the logs are really large, and not very useful

Android + Kotlin + Hilt: Error building project I'm new to Hilt, and I'm struggling my head in order to implement it in my multi-module app. After infinite attempts the build error varies from "error a" to "error b", then "error c" and so. This is how I've started implementing Hilt into my multi-module app: Project build.gradle: buildscript { ext.kotlin_version = '1.7.10' repositories { jcenter() google() } dependencies { classpath 'com.android.tools.build:gradle:7.2.1' classpath...

GraphQL DGS- Kotlin, Modify the parent resultSet, based on Child dataloader results class UserEntity(val id: UUID, val name: String, val email: String){ val occupation: String? =null } class AddressEntity(val id:UUID){ val line1: String, val line2 : String, val city: City, val state: State, val zipcode: ZipCode @ManyToOne @JoinColumn(name = "user_id", referencedColumnName = "id") var user: UserEntity } class UserResolver(private val userService: UserService) { @DgsQuery(field = DgsConstants.QUERY.GetUsers) fun getUsersByLocation( dfe:...

Java/Kotlin libraries for image rendering I'm looking for simple library or some approach in native libraries to draw some shapes, text etc. by some logic, save as PNG and deliver it. For example, the input is the string "2+2". At the output, I need a picture in PNG format, which shows 4. I tried googling it but found mostly GUI solutions (like AWT) or different libraries for image processing, like resizing, crop etc.

Spring Boot Jpa Kotlin - Not a Managed I am getting the following error attempting to run my kotlin spring boot application. Caused by: java.lang.IllegalArgumentException: Not a managed type: class zielinskin.kotlinsample.data.SampleEntity Trying to create a least possible code example repo with kotlin on the latest spring boot and kotlin, but am struggling. I am using OpenJDK 18. I have tried with and without enable repositories annotation, Int and Integer for id, multiple types of entity scans (and without), but nothing seems...

How to center CustomItem in LazyRow vertically so that each item is in the center of The LazyRow? I tried using a ContraintLayout to center it vertically as shown below. Nothing happens after I run the app, it stays in the same position. However, I used this same code snippet in my button and it seems to center it along side LazyRow. Note: I am trying to accomplish this without modifying padding Logic I am trying to use to center vertically (NOT WORKING) Box( modifier = Modifier .padding(top = padding, bottom = padding) .constrainAs(item) {centerVerticallyTo(lazyRow)}, //...

Android retrofit async api calls won't work after adding okHttp interceptor to check for network connection We have both asynchronous and synchronous calls implemented using retrofit and Either to map success/error. After adding the network interceptor asynchronous calls are returning bad responses(works fine on postman). I have tried adding a general error JSON response thinking Either is not able to catch the exceptions but still no luck. please suggest a fix or new approach Interceptorclass - override fun intercept(chain: Interceptor.Chain): Response { val request = chain.request() try...

How to get connection join/left event in ktor I want to implement the record of adding client connections in ktor's websocket, but I can't find the corresponding document. Is there a way to achieve this? like this install(websockets) ... routing { onOpen(session){ ... } }

Set Shared Preferences data only on install I want to set the user name in my application only once per install. We don't have to worry about if the user clears the data or not. How can I achieve this ?

Is there any way to prevent the bottom navigation bar from moving during rotation? Im trying to get my bottom navigation bar to be fixed on a side of the screen. Let me use pictures to help you understand what I am hoping to achieve. As you can see, I am trying to achieve the navigation bar to stay in its same position (i.e. top when in portrait but changed to left in landscape), and the icon buttons in the navigation should be rotated. I remember seeing certain apps do this before but I am...

Kotlin: Keyword cannot be used as a reference fun main() { print("This is a calculator") print("enter your first number") val no1 = readLine()!! print("enter your operation") val operation1 = readLine()!! print("enter your second number") val no2 = readLine()!! val result = if(operation1 == '*') print("$val no1 * $val no2") } It keeps coming up with Kotlin: Keyword cannot be used as a reference. I am very new to kotlyn and I am just trying to create a basic calculator. PLease help.

How to cancel progress bar of Main Activity when moving to a Fragment? I show a spinning progress bar before beginning a fragment. The run debugger shows that it is still running after the fragment is running and functioning. Is there a proper way to end it? I simply want the user to know that something is happening while they wait (network connections, etc). To expand a bit, the run monitoring of the emulator shows many lines like D/eglCodecCommon: setVertexArrayObject and these don't occur if I comment out the View.VISIBLE line of code...

Data class being used by other classes as parameter I want to use data classes to store user input and computed results. Then convert the data classes to Entity and update the data base. The problem is I'm not clear on the best practices for using data classes. I have read the documentation : https://kotlinlang.org/docs/data-classes.html along with other sources. However, they don't have more complex examples of how different classes are supposed to access...

flutter error: Execution failed for task ':app:compileFlutterBuildDebug' who can help me with this error that I have been trying to solve for almost 2 days and I have not been able to. I have done several things, removed flutter and reinstalled it, flutter clean and flutter pub get and tried to update all the dependencies but nothing has worked, what do you think it could be? Thank you very much in...

Showing DialogFragment from RecyclerView in Kotlin [duplicate] I have a DialogFragment that I want to show when clicking on an item inside a Recycler View. Here are my files: DialogFragment.kt: class TaskDialogFragment:DialogFragment() { override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View? { var rootView: View = inflater.inflate(R.layout.task_dialog, container, false) return rootView } } RecyclerViewAdapter.kt: class RecycleViewAdapter():...

Webview gives error while leaving from my app js error Hey stackoverflow I am redirecting user to Webview from my app the redirection url is host on my server which is working fine on my device but in my testing its not working for some other devices. Error which i found from logcat is : I/chromium: [INFO:CONSOLE(478)] "Uncaught TypeError: Cannot set property 'innerHTML' of null", source: https://secure-acs2ui-b1-indmum-mumrdc.wibmo.com/v1/acs/legacy/live/8547/M.P/uid=fd076e4c-afc4-44b2-99f5-97a0bC3lD7qB (478) My webview function is :...

setText of the TextInputEditText does not change - Kotlin Hey fello developers 🖐️ I've been trying to change the text value of the TextInputEditText programatically to save the activity state on orientation as it gets lost, but the setText(text: CharSequence!) doesn't work even when passing explicit String as its arguments. Here's a snippet of the code of the activity in activity_main.xml And here's the Kotlin code in MainActivity.kt lateinit var uriTxt: TextInputEditText override fun onCreate(savedInstanceState: Bundle?) {...

How to wait result from OKHTTP response without freezing app Kotlin? I am writing a small application in Kotlin with JetpackCompose and my application freezes (CountDownLatch) when a request is called, is there any way to avoid this? Without CountDownLatch, okhttp does not have time to return the result before the method completes. MainActivity.kt fun infoServer() { val viewModel = ViewModelProvider(this).get(MainActivityViewModel::class.java) var txt = remember { mutableStateOf(0) } Column( horizontalAlignment =...

Android Paging 3 remoteMediator infinitely load(APPEND) data with Compose I'm trying to implement a list with Paging 3 library using RemoteMediator. Initial loading is OK. Mediator loaded only 3 pages, which is set in 'PageConfig'. But When scroll the list until trigger extra loading for more data, then Mediator starts loading data infinitely until it returns MediatorResult.Success(endOfPaginationReached = true) (Which means all data in remote was loaded). Even though scrolling is stopped. I have no idea what makes Mediator keep loading. I want Mediator to load...

KMM how can I add custom value to Bundle.main.infoDictionary I have kotlin multiplatform project. I know that I can read from infoDictionary (infoplist) data in runtime with: val value = NSBundle.mainBundle.infoDictionary?.get("customValue") My question, how can I add customValue to infoDictionary as part of build process, in build.gradle.kts of shared. it.binaries.framework { baseName = "shared" embedBitcode("disable") // here I want to infoDictionary.add("customValue", myValue) }

Drawables not loading with coil in release build after applying dexguard I am using coil(Kotlin) library to load drawables. Working fine in debug build but after generating release build with dexguard no drawable loads. Library I am using implementation("io.coil-kt:coil:1.1.0") ivGlowingCircles.load(R.drawable.glowing_circles)

How to show BottomSheetDialog below toolbar I'm trying to achieve something that looks like in the image below. It's a sheet shown from the top and is below the toolbar. It also has dimmed background. I was able to show the sheet from the top as you can see in this video with the help of <a...

Update ProgressBar in aAdapter I want to show a progressBar when upload files to server. I can get progress values according to written bytes of file. But I can not update the progress bar. The problem is progress bar is filled to max immediately. xml: In adapter I used a higher order function to get viewHolder. So in this way I can access the progress bar outside of Adapter and use it. var holderCallback: ((RecyclerView.ViewHolder?) -> Unit) = { } override fun onBindViewHolder(holder: FileViewHolder,...

does coroutines in Kotlin work like threads? So I am trying to learn kotlin coroutines for networking purposes on Android but I don't understand how they work. What am I missing in the code to make it work like a thread (the two counters should mix together ) ? Should I use something else than runBlocking {} ? import kotlinx.coroutines.* suspend fun counter(a: Int) { for(n in 0..a) { print(n.toString() + " ") } } fun main() { runBlocking { counter(10) launch { counter(10) }...

How to update a Webflux object from repository and save it back I want to 1) get an object from my repository, 2) update that object and then 3) save it back. I've already done first two things: fun updateUniversity(id: ObjectId, newName: String, newCity: String, newYearOfFoundation: Int): Mono { return universityRepository .findById(id) .switchIfEmpty(Mono.error(NoSuchElementException())) .map { if (newCity.isNotEmpty()) it.city = newCity if...