java.lang.RuntimeException: cannot find implementation for com.example.laptopsdb.AppDatabase. AppDatabase_Impl does not exist (July 2022) Yes I have already tried some old guides, I described it below. I created new project for Room Database in Kotlin Android. I followed the official google documentation for it. https://developer.android.com/training/data-storage/room If I follow as per documentation I get error java.lang.RuntimeException: cannot find implementation for com.example.laptopsdb.AppDatabase. AppDatabase_Impl does not...

How to Animate An Image in Jetpack Compose? I haven't seen any posts that are searching for what I want. I simply want to animate an icon to go across the screen. Just an Image, to go left to right upon showing the composable. So far I've only seen that Animations are launched with a button click or when something happens, but I want this Animation to launch when the Composable in first in view

How to make a ListView in a Fragment display my data (Android)? I'm working on my Android app and have a Fragment FragmentBlank with TextView messages_list in it. In the FragmentBlank.kt I wrote these 5 lines: override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View? { val view = inflater.inflate(R.layout.fragment_blank, container, false) val listOfMessages = view.findViewById(R.id.messages_list) val values = arrayOf("Android", "iPhone", "WindowsMobile", "Blackberry", "WebOS",...

Overwhelmed by layouts, what are my alternatives to make a layout like this, but dynamic number of items? I'm a flutter user trying out kotlin dev first time, but im kinda confused what the best alternatives for this type of layouts are. I understand that I use recyclerview for a dynamic number of items. And since theres two dynamic ones (one for number of sets, one for each exercise). Do I use two nested recyclerviews?

Kotlin Gradle plugin need update Hello for every one I have some problems in vscode i need solve this problem [enter image description here][1] [1]: this is real estate app when i run this app i have get this msg i need to solve this problem here is build.gradle file need to upgrade file def localProperties = new Properties() def localPropertiesFile = rootProject.file('local.properties') if (localPropertiesFile.exists()) { localPropertiesFile.withReader('UTF-8') { reader ->...

how to make many ViewModelFactory in kodein with kotlin i use kodein principle in mvvm to set my ViewModelFactory with repositories class AddSpendApplication: Application(), KodeinAware { override val kodein: Kodein = Kodein.lazy { import(androidXModule(this@AddSpendApplication)) bind() from singleton { PersonalAccountingDateBase(instance()) } bind() from singleton { AddSpendRepository(instance()) } bind() from provider { AddSpendViewModelFactory(instance()) } }} so when i have many ViewModel in my app , i should make...

Kotlin. Data class: how to update one of the parameters? I have data class. For example: data class Test( val data: String, val data2: String ) Suppose I have a need to change one of the parameters of my data class. For this I will write the following code: var test = Test(data = "data", data2 = "data2") test = test.copy(data = "new_data") But at the same time, I can make a parameter var and change it directly: data class Test( var data: String, val data2: String ) var test =...

How to block adult websites in android programatically I am developing a parental control Android app with Java. I want to block all adult websites. But I don't know how to do it! Should I have a database of adult websites? Or is there a website that will give me an api to check for inappropriate websites?

Validation of blocking calls within non-blocking coroutine contexts in Kotlin We have semantic validations to prevent calling a suspend function from within a blocking non-coroutine context. Is there a way I can mark a function as blocking to at least warn that you are about to call a blocking function? If so, is there a way to semantically or at runtime to indicate that the current dispatcher used by the coroutine context is intended for non-blocking purposes and that you are about to call that function which you have marked as potentially blocking?

How to animate the next item smoothly when expanding the previous item in recyclerview I'm making an expandable nested recyclerview. I have implemented both a parent recycler view and a child(nested) recycler view, but I would like the next item to be pushed out more smoothly when the previous item is expanded. I'll show you an example image. First what I want. But what I made. If you look at the GIF file, you won't notice...

JetpackCompose Page crashes after splashscreen [closed] I am developing an application with jetpack compose. The interface was working, today I wrote the necessary codes to make transactions using the room database. After adding the database codes to the relevant fields in the panel page, the application crashes after splashscreen. I couldn't find the error. Since the codes are long, I share the codes on the github page. All Folder <a href="https://github.com/imonursahin/ibansfer-with-kotlin/tree/main/app/src/main/java/com/example/ibanshare"...

Notes sound recognition (Piano) I create Android app to recognize all of piano notes. Is there any library to help me with that or should I use some kind of alghoritm or some other way to realize this functionality?

Why can I not delegate to a parameter in a Kotlin value class? I can delegate to a contructor parameter in a class class SerialNumber(val value: String) : CharSequence by value { init { require(value.isNotBlank()) } } but if I make the class a value class @JvmInline value class SerialNumber(val value: String) : CharSequence by value { init { require(value.isNotBlank()) } } then the compiler says "Value class cannot implement an interface by delegation if expression is not a parameter" As far as I can see value is a...

Kotlin Concurrency againts Goroutine, Task, CompletableFuture People always show the same example when I read articles about concurrency in kotlin coroutine or golang goroutine. Create 100_000 Threads in Java or C#, ooopps Stackoverflow. Yes. but anyone Who uses directly Thread classes in Java or C#? In java and C#, There are thread pools for CompletableFuture and Task. When We try to create 100_000 Task or CompletableFuture, We can do that easily with ExecuterService/ForkJoinPool or dotnet DefaultThread Pool. They will reuse the threads. If there is no...

Translate animation not moving smoothly I am trying to make a card game, I use translate animation to move the cards when user plays. It came to my notice that the animation works smoothly for device with higher android versions and performs poorly and Jacky on android 5.0 down. How can I make the animation moves smoothly on all devices? Below is my method used for move the cards. public void Move_Card_To_PlayArea(){ Move_Card_Animation =new TranslateAnimation(0, (float) move_card_getX,0,(float) move_card_getY);...

Kotlin. Mockk: Missing mocked calls inside every I'm using mockk library fo testing my business logic. I have interactor which I want to test. My interactor retrieve in constructor data class. Fox example: data class Test( var data1: Data1? = null, var data2: Data2? = null, var data3: Data3? = null // etc ) data class Data1(var nestedData: String) data class Data2(var test: String) data class Data3(var test: String) Inside my test I'm trying to make partial mocking: @MockK private...

Java 9 module cannot access files in same module The whole project can be viewed here. I have the following minimal demo project: package com.example.demo import io.swagger.annotations.Api @Api(tags = [API_NAME]) class DemoClass const val API_NAME = "demo" fun main() = println("Hello World!") Works perfectly fine as is. However now I want to add the Java 9 module system. I add a module-info.java under src/main/kotlin with this content: module com.example.demo...

Mock boolean property using Mockk is not working I'm using Mockk and I want to test a MediatorLiveData that depends of some boolean properties of the class. I was using mockkConstructor(Boolean::class) but suddenly a warning appears on the console log and all the test cases fails (I'm not sure but seems to be happening after updating the Kotlin version) WARNING: Non instrumentable classes(skipped): boolean Class to test class Testeando { var testBool = false fun test() : Boolean { return testBool } } This is the...

JavaFX 3d : Weird clipping or false z-buffer i guess So, I'm working on my little project for perlin-noise generated meshes and all works fine, except the rendering. I don't know what I am doing wrong. From the one side (looking in +z direction) everything seems totally fine, but from the other side (looking in -z direction) it just looks weird. Demonstration Video: (Sorry for the bad quality) <a href="https://drive.google.com/file/d/1q7tsSzVr4VVw4Tr5Y-WNTdlO5wo6DoKg/view?usp=sharing" rel="nofollow...

Using Transaction in PostConstruct I'm using Hibernate with Panache and I need to add a user when the application starts. For that, I'm annotating my bean with @Startup and then I have a method with the annotation @PostConstruct. Currently, I'm using the following code: @Startup @ApplicationScoped class AuthService { @Inject lateinit var userRepository: UserRepository @PostConstruct private fun init() { logger.info("Creating admin user") val user = User( "Admin", ADMIN_NAME,...

recreate activity with animation not work Change all my activity to ViewModel to keep the UI data because I need to recreate the activity when switching to dark mode or applying a theme. I created the fade in and fade out animations to add them, but I can't get it. I already tried recreate() overridePendingTransition(in, out) finish() overridePendingTransition(in, out) startActivity(intent) overridePendingTransition(in, out) Even if it is not with animation, when recreating the activity the transition is very different from when,...

Can you create a Custom Conditional Expression in Kotlin? Currently I'm trying to write the equivalent of a custom conditional block or a non-extension version of the takeIf function that carries through things like nullability checks ect... and having difficulty doing so. The motivation behind this is that at my company we have a lot of use cases that look like either return if (condition) { // Code block (can often be large enough to distort what the else belongs to at a glance) } else { null } or something that has...

try-catch-finally as expression I am stuck with an exercise on hyperskill.org at try-catch-finally exception(exercise: Parting words). Try-catch-finally should be used as an expression. In the "try" block an input string is required to check if it consists of two words separated by a space. If not(there's only one word given), an exception is thrown in the "catch" block. Otherwise the code in the "try" block should be evaluated. How can it be achived? fun pepTalk(name: String) : String { val array = name.split("...

Todo List Android App -- Clean up code -- Espresso and Unit Tests Trying to improve this code and separate the business logic as much as possible. I am feeling kind of lost lol. Any advice on how to test this app and clean up the code would be very appreciated. I don't want to post all of the code on here so I will link my repository on GitHub. Really need this explained simply. Thank you for your time!! link -> https://github.com/sammorton11/NotesApp class AddEditNoteActivity :...

android: Notify a fragment when something happened in another fragment I Built a fragment (using jetpack compose to built the views) and in this fragment I have a button. every time this button was clicked, I want to notify another fragment to do something. How can I do that? I use MVVM and MVI design patterns. Thanks.

Kotlin/JS build is empty In the following project: https://github.com/MarcinMoskala/AnkiMarkdown When I build or push a package to NPM, it seems empty. No binary code. I do export a single class: https://github.com/MarcinMoskala/AnkiMarkdown/blob/master/src/jsMain/kotlin/AnkiConnectorJs.kt

How do I split a List of objects by a delimiter in Kotlin? I have a List of objects I want to split by a delimiter into sublists, e.g: val tokens = listOf( Token(name = "lorem", val = "ipsum"), Token(name = "dolor", val = "sit"), Token(name = "newline", val = "\n"), Token(name = "amet", val = "consectetur") ) The delimiter should be any Token whose name is "newline", so after the split, tokens should become: listOf( listOf( Token(name = "lorem", val = "ipsum"), Token(name = "dolor", val = "sit") ),...

How to prevent the user from entering two dots in a text field jetpack compose I have a Text Field in android jetpack compose, which used to get number from user including floating points. How to prevent user from entering 2 dots in the input. For Eg: Number should be 56.54,.266, 367.5 Should not be like this: 34.3.5

Get card verification method from track2 of credit card I am dealing with a problem, there is no information in web about how to get card verification method from track2 of credit card. I need to check if there is none/PIN required or signature needed. Anyone know the solution?