Why Android Studio "Could not find kotlin-compiler-27.0.1.jar"? I can run the application in debug mode without any issue but once I decide to generate a signed apk Android studio shows me this f...ing build error: Could not find kotlin-compiler-27.0.1.jar (com.android.tools.external.com-intellijkotlin compiler27.0.1). Searched in the following locations: https://maven.google.com/com/android/tools/external/com-intellij/kotlin-compiler/27.0.1/kotlin-compiler-27.0.1.jar How can I fix this? I use Android Studio v4.0.1, kotlin v1.3.72,...

HTTP POST Using HttpURLConnection Not Sending I'm trying to send a POST request, and it's not getting sent, but no exceptions are thrown either. The getSLVersion() function peforms a GET request, and that works. The commented out setDeviceName performs a POST, which also works (I commented it out to see if it was interfering somehow, nope). The POST in this function appears to work when I step through with the debugger, but I don't see the request in Wireshark. It looks to be the same as the setDeviceName function, which does work. I...

Is there anything updated for proguard-rules suddenly for android build creation I have created release of staging variant at 4pm IST today which went well, then I have released sandbox at around 7:30pm and the response classes start getting obfuscated! App started misbehaving, is there anyone else who faces same ?

Implementation of a mavenLocal repository into a Gradle (Android) project I installed my Android/iOS Kotlin library KMachineLearning to the Maven Local repository located in $USER_DIR$/.m2/repository using the "Maven Publish" plugin for IntelliJ IDEA. The path of KMachineLearning's POM file is: $USER_DIR$/.m2/repository/com/michelepara17/KMachineLearning/1.0.0 Now I want to import the library into an Android project, DigitReader. I included the repo into the gradle.build [DigitReader] file: ... allprojects { repositories {...

How to open multiple pdf link using pdfview-android library I am using this pdf viewer library to open pdf from the URL. It's working absolutely fine. but I unable to add multiple URLs myself, as I am completely new in Kotlin. Please help me out.

How to send an object inside a Coroutine Kotlin? I'm starting to use coroutines with Kotlin, I want to pass as a parameter an object from the fragment, but I still haven't understood well how this object could happen to this coroutine, I'll really be grateful for your help val addObject: LiveData = liveData { emit(Result.loading()) try { emit(Result.success(fetchUser())) } catch(ioException: Exception) { emit(Result.error(ioException)) } } From my fragment I would have to send my object and then be able to...

Is there a way to apply a conditional against a list of values in a jsonb object? Currently, I have a jsonb column in a PostgreSQL table which stores a json object with the format { "subscriptions": { "subscription1": { "subscribed": boolean }, "subscription2": { "subscribed": boolean } } } There can be any number of subscription1/2/etc. in the document, all with different names. I'm trying to find out if the document contains subscriptions.subscription1.subscribed == true, etc. for each subscription type I have. I have a list of the...

How to get some letters after a specefic word in string in kotlin? I have a string like this "connect successfully , phonenumber:09100000000 ,email:alaki@yahoo.com" then i want to grab a phonenumber from this string , i want a string "09100000000" anybody has an idea ???

App not initializing because of Hilt error I am trying to start a small project, following clean architecture, MVVM and using Retrofit, coroutines and whatnot. I am using Hilt for DI, and followed pretty much what I saw on the docs and other projects. If I annotate either my Activity or my Fragment with @AndroidEntryPoint or the Application with @HiltAndroidApp, the app cannot even start. The stack trace is not saying a lot to me, but maybe I'm skipping something. If I don't annotate the classes, the app tries to start, but since it...

Suspend execution until object value is set through LiveData I'm working with a third party SDK which has a LiveData object I need to observe in order to set the value of a custom object of mine: fun setValueAndDoSomething(activity: FragmentActivity) { var myCustomObject: MyCustomObject? = null sdkComponent.observe(activity, Observer { sdkResult -> myCustomObject = MyCustomObject(sdkResult) }) // Wait until myCustomObject is not null myCustomObject.doSomething() } I want to wait...

Error en context del fragment en un RecyclerView Kotlin Soy nuevo en Android, recién vi un video en youtube sobre un RecyclerView mostrando datos almacenados en Firestore, seguí el tutorial y funcionó correctamente. Ahora estoy haciendo un proyecto escolar y necesito hacer lo mismo pero mostrando el RecyclerView en un fragment. Tengo problemas (en FragmentPlace.kt) al momento de usar el this como "context" cuando llamo al Adapter y al LinearLayoutManager; y el this como "owner" cuando llamo fetchSucursalData. Mi código para PlaceFragment.kt class...

gracefully handling errors from async functions Building on the previous question that address handling errors from suspend functions, this question is based on handling errors from async functions. var userAsync: Deferred? = null arguments?.getLong("id")?.let { userAsync = async { userModel?.findById(it) } // findById may throw an error } val data = userAsync?.await() // Main thread, update UI

How to get the exception that failed a Kotlin coroutine job? kotlinx.coroutines.Job A coroutine job is said to complete exceptionally when its body throws an exception However, I'm not seeing anything in the API that returns the exception that failed the job. Is there a way to get it?

Order of execution - Kotlin I have tried to debug the next program to understand the execution order, however I'm still confused about the execution order fun foo(): String{ println("Calculating foo...") return "foo" } fun main(args: Array) { println("First ${foo()}, Second ${foo()}!") } // Result: // // Calculating foo... // Calculating foo... // First foo, Second foo! // I though the execution would show something like this: // // First Calculating foo...foo, // Second Calculating foo...foo! Isn't main...

How to encrypt data with the private key stored in AndroidKeyStore? I am making an Android application that needs to communicate with a server. I want to use RSA to encrypt data but I face some problems with encryption. This is how the process goes: Generated public key and private key on the Android Client and stored them in AndroidKeyStore. Private key is used to encrypt data, and the public key will be shared with the server. Server will decrypt data with the public key. However, I don't know how to get the private key from AndroidKeyStore and decrypt...

Is there any way to take user input of List in Kotlin? I want to ask from user to put some values instead of declaring some default values. Help me to change the second line of code. //Program To Print The Product of List using Extension function. fun main(){ var list = listOf(1,2,3,4,5,6) println("The product of $list is ${list.product()} ") } fun List.product():Int{ var sum = 1 for(i in this){ sum *= i } return sum }

Why regular spring controller not working but bean controller working? I have created a regular controller with spring boot and webflux like following @RestController @RequestMapping("/api") class DemoController { @GetMapping("/hello") fun getMapp(): Mono = Mono.just("Hello") } this is not working getting 404 when invoking the hello url however when I do the same thing with bean and corouter like following @Configuration class DemoController { @Bean open fun demoRoutes() = coRouter { "/api/".nest { GET("/hello") {...

Android.Clean Arch. Send data from domain to data layer Okay, we have 3 layers for clean architecture (presentation, domain, data). Data layer has reference to Domain layer, but Domain layer haven't any references to other layers. Domain layer: class SendDataInteractor( val repository: Repository, val data: Data ): ObservableUseCase() { override fun buildObservableUseCase(): Observable { repository.sendData(?) } } Data layer: fun sendData(data: DataEntity): Observable { } How can i send data from domain layer to data...

Kotlin: Evaluation of getter-/setter-methods I've got following example class: fun main(args: Array) { var car = Car("Ford", 50, 8000) println(car.vendor) println("Speed: ${car.speed}") car.speed = 65 // How does it know which setter to invoke? println("New speed: ${car.speed}") } class Car(vendor: String = "Unknown", speed: Int = 0, price: Int = 0) { var vendor = vendor get() = field set(newVendor: String) { field = newVendor } var speed = speed get() = field set(speed: Int) {...

Dependency to format values to human readable form in Kotlin I am creating an app in Kotlin in android studio. I want to display values in my app so that if the number is long, lets say in millions or billions, it would truncate it and display it with a suffix, like K(thousand) M(million) etc. For example: If the value was 331330464, it would display as 331.3 M Is there a dependency that allows me to do this formatting?

Android TensorFlowLite app crash issue in background thread App crashes without crash logs and exceptions and I am sure the getData function running in background thread. Here's my codes. Actually the codes can run in newer phone like samsung s-10 but I run the codes in a older phone. class PlayListsViewModel(private val playListsRepository: IPlayListsRepository): ViewModel() { private var playListsResponseArray : ArrayList = ArrayList() var listLiveData : MutableLiveData = MutableLiveData() private var imageArray : CopyOnWriteArrayList =...

When I purchase my products with the testing billing it shows all products purchased instead of the one I have an app that has 4 in-app products.When someone clicks the a product it takes them to an activity where they view the products available and shows them a purchase button. Now after they've made their purchase the purchase button would disappear and a download button would appear. Now my issue is that when I purchase one product it shows on the other 3 activities that the purchase has been made. It seems that when one product is purchased all of them get purchased and show the download...

Android: Firebase Entity is null when using kotlin flow My problem is, that when I try to get a document out of my database, that this document aka the object is always null. I only have this problem when I use Kotlin Coroutines to get the document out of my database. Using the standard approach with listeners do work. EmailRepository interface EmailRepository { suspend fun getCalibratePrice(): Flow suspend fun getRepairPrice(): Flow } EmailRepository Implementation class EmailRepositoryImpl @Inject constructor(private val db:...

Timed metadata using ExoPlayer I'm creating a custom Android app connected to a podcast for playing audio. I want to be able to display an image in the Exoplayer instance or a separate image view to match what the podcast hosts are talking about at the time. For example, if the hosts are talking about a particular sporting personality, I want the app to be able to receive an event to download an image of that person off a server and display it. To date I can't find an example of ExoPlayer being able to do that. Would...

Kotlin Coroutines how to wait before starting next job? I'm currently using Kotlin's Coroutines in my Android application to make API calls which will return a JSON to the user. I want the app to wait for a while (e.g. 100 ms) before next call. But I have not found a way to do it due to how Coroutines differs from Thread Below is a code snippet of my method private fun fetchSingleMetadata(dir: File) { currentItem.value = dir job = coroutineScope.launch { metadataRepo?.fetchMetadata(dir) // API call to server...

Switch Kotlin to Flutter If you use Java/Kotlin For android APK Development. Not Do this. Because -> 1. flutter syntax,keyword,type mostly different. -> 2. and mostly companies require Swift and Java/Kolin. -> So You Learn C# and C,C++ and Develop 2D,3D Games (Unity , Real Engine and More) -> Thanks.

Function observer in livedata does not work I'm trying to get the response from Api with the Post method(retrofit). But the Observer doesn't work. I don't understand this error. even though I implemented it in the login activity, and it worked. the difference is this is done in fragments. \n Can you help me? Note: I used KOIN for DI. I tried initiating the viewmodel with viewModel () and shareViewModel (). but they are no different here I attach a snippet of the code: Fragment.kt viewModel.getKpp()?.observe(viewLifecycleOwner, Observer...

Android Studio Gradle Build Error Type Code 82 I am fairly new to Kotlin and Android Studio. When I tried to add a dependency to my Android application (the dependency is json-simple) it throwed me an error with the cause as Invalid type code: 82. Gradle had synced correctly without any warnings and errors, but it throws me this error when I try to run my code. Can anyone please tell me how to remedy this issue? The stacktrace is :- Executing tasks: [appassembleDebug] in project D:\PathToProj

Task apppreBuild UP-TO-DATE

Task...

How to pass an editText back to the Main Class android studio kotlin I have a main activity with 4 images. Each image has a title(textView) underneath it. When the image is pressed, it goes onto the second activity. In the second activity it takes the picture that was pressed on and also the title and displays it. I want to let the user be able edit the title and when the back button is pressed, the title of the image that was pressed on will be changed to what the user edited it to. I'm not sure how to pass the editText back to the main activity. This is my...

Flood Fill for Kotlin I am working on a paint tool for android and have attempted to implement a 'fill with color' tool. Where a user is able to fill a particular area with color depending on what they have selected. I have found examples of Flood Fill for Java but cant see anything similar for Kotlin. I have tried the following - <a href="https://developer.android.com/reference/kotlin/android/graphics/Path.FillType" rel="nofollow...