For comprehensions with kotlin and arrow-kt library I use arrow-kt library and I'm trying to employ Either and IO within the same for comprehension. Say I have the next piece of code: IO.monad().binding { val ans: Either = someFunctionThatReturnsEitherWrappedInIO().bind() } Now, I'd like to use binding on the ans: val data: Data = ans.bind() // My intent Is it possible to do It whithin the scope of the first piece of code?

How to run TestNG test with Kotlin+Gradle? So I'm writing a test for android app (with usage of Appium, TestNG and Kotlin+Gradle). I already wrote similar test in Java+Maven, but I have problems with understanding of how to configure test run with Kotlin+Gradle. Here is current code of my project on github: https://github.com/Wonderio619/KotlinAndroidTest As you can see, I have MobileTest.kt file with some initial logic to setup app and...

How add view by code and putting textview inside it I want create view by code and Putting textview or button inside it in kotlin android studio I do this code by not showing textview val view1 : View view1 = View(this) myLayout.addView(view1) view1.layoutParams.height = (Height * 0.35).toInt() view1.layoutParams.width = (Width * 0.8).toInt() view1.x = (1+ Width*0.10).toFloat() view1.y = (Height*0.15).toFloat() view1.setBackgroundColor(Color.rgb(128,0,128)) val name_label1 =TextView(this) myLayout.addView(name_label1)...

Corda flow executing external original service instead of the mocked service for unit test case I am trying to write test cases for one of the flows which calls an oracle service which further calls a simple java service to fetch some data from csv. I want to mock the response of the one of the functions of the service which fetches csv data. I use MockK framework to mock the response. The problem I am facing is when the flow runs, the original service is called instead of returning the mocked data. Following is the snippet of my code for help. Unit test: class TestsService { private...

Why do i get "Unresolved reference: bind" error in Android Studio? I keep getting the error "Unresolved reference: bind" that bind is not resolved althought i added it in the gradle files. App gradle: apply plugin: 'kotlin-kapt' android { ... ... dataBinding { enabled = true } } dependencies { implementation fileTree(include: ['*.jar'], dir: 'libs') //kotlin implementation "org.jetbrains.kotlinkotlin stdlib jdk7$kotlin_version" //support implementation 'com.android.supportdesign27.1.1' implementation...

How to implement a getComponent(/*Class*/) method for video game in kotlin I'm writing in kotlin, developing a text based RPG game for android. I'm currently at the development of my object system going with a strategy / entity component design. I'm stuck on the getComponent function and have no clue what I'm doing I need a method that accepts a reference to a Class type and then compares that to all the component instance's class types. I've tried using generics, KClass, Java Type but can't find the answer. My main issue is the "as" operator. I have no clue...

Repeat the input audio from a microphone as the output audio to the speaker in Android App Just as an experiment I am trying to create an app that can repeat the input audio from a microphone as the output audio to the speaker. Till now I am able to do it for like 0.5 seconds and then the noise/ringing sound increases too much for me to hear anything that is being repeated. I tried playing with different sample rates but still no improvement. I tried searching on google and other questions on StackOverflow but most of the methods used there are deprecated in API level 26. private...

Idiomatic way to create n-ary cartesian product (combinations of several sets of parameters) To create all possible combinations of two sets of parameters and perform an action on them, you can do: setOf(foo, bar, baz).forEach { a -> setOf(0, 1).forEach { b -> /* use a and b */ } } However, if you have (potentially many) more parameters, this quickly turns into a pyramid of doom: setOf(foo, bar, baz).forEach { a -> setOf(0, 1).forEach { b -> setOf(true,...

No Adapter attached in Bottom Navigation I am trying to display items in bottom navigation activity using recycler view but I am not getting the item values. I have three layouts in my project activity_main.xml, list_row.xml and fragment_home.xml. Recycler view is in fragment_home.xml and list_row.xml contains two text views. I am not seeing any error in the code but in the log, I am getting No adapter attached message. Your help is highly appreciated. Error: E/RecyclerView: No adapter attached; skipping layout Below...

unexpected text from the NFC tag I am making a app with NFC first time. In my tag I have got data MimeType record type ( application/json Data: "My text" ). This is my code: private fun processIntent(checkIntent: Intent) { if (checkIntent.action == NfcAdapter.ACTION_NDEF_DISCOVERED) { // pobieranie wiadomości NDEF z taga NFC val rawMessages = checkIntent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES) // wiadomość NDEF zawiera wszystkie rekordy z tagu NFC var ndefMsg =...

Compiling problem after adding databinding in android studio When I'm trying to compile my Android project using dataBinding ressouce, I get this error message w: warning: The following options were not recognized by any processor: '[android.databinding.artifactType, android.databinding.printEncodedErrors, android.databinding.minApi, android.databinding.isTestVariant, android.databinding.enableDebugLogs, android.databinding.sdkDir, android.databinding.bindingBuildFolder, android.databinding.enableForTests, android.databinding.modulePackage,...

Marker view not showing with MPChartAndroid library I am facing an issue where I am building a custom marker but the marker does not appear. I tried everything and did not get it to work. This is my code from the char activity. Can someone take a look and see what is the problem? I tried enabling and disabling everything. Could it be that the problem is from the getEntryForIndex(index).icon ? This is my main activity class Main2Activity : AppCompatActivity(), OnChartValueSelectedListener { lateinit var dataSet : LineDataSet...

How to make fading actoin bar in kotlin? I want to do an action bar like this in github https://github.com/ManuelPeinado/FadingActionBar but in kotlin language, I don't want (collapsing toolbar) It's different, And Thanks

is await blocking the UI thread on android? I have been wrapping my head around coroutines and I was wondering about the following code. I have the following operation on my onCreate(). asyncJob = GlobalScope.launch(Dispatchers.Main) { val name = async(Dispatchers.Default) { queryDevices() }.await() mDeviceName.text = deviceName } Printing this out the order of execution seems to be before "name" is on UI thread and after name is set, it is on the UI thread as well. The queryDevicesMethod() is in a...

mocking observable error responses in retrofit 2 I have to show some error message based on the error code in the response body from the server. My code works, but I can't test it. The response body looks like this: {"errors":["PROFILE_NAME_BAD_WORD"],"errorCode":7} my code to call the service is relatively straightforward (i think). Please note that the it: Response! is just to show the type (as it would be shown in android studio). myService.createProfile(it, createRequestBody) .observeOn(mainThread) .subscribe({...

Kotlin Android JSON Parsing with Retrofit to RecyclerView I am trying to parse json data from url https://api.sr.se/api/v2/channels/?format=json and show json response to a Recyclerview. But nothing shows in my Recyclerview and I think my call for base url is wrong. All I want to display is name and id of all channels and then move forward to song thats plays right now in every channel. Can someone help me? Code: data class Complete(...

Parse String to Int Kotlin How to parse String to Int get value from edittext my Code: var data = input.text.toString().trim().toInt() for (a in 0..data){ } but i have error NumberFormatException: For Input String " "

Kotlin type parameter subclass of When I have this class: abstract class MyAbstractClass { abstract fun convert() : T } Can I somehow specify that T should be a subclass of MyAbstractClass?

Is it possible to pass Kotlin's kt files to TestNG configuration xml? For example, in Java we simply do like this: MobileTest is a java class in this case. But when I tried to do same thing with MobileTest.kt kotlin class (MobileTest class inside kt file), is says "cannot resolve class". Is there some workaround for this ?

Make asynchronous call synchronous in Kotlin I have an API I have no control over.... which contains a method that does some work and returns the results asynchronously. I would like to call this method synchronously in parts of my application. I have done this by adding a class ResultHandler which captures and returns the result. Is there a better way of doing this than the way I've done it below? Perhaps using standard kotlin (or Java as last resort) library methods. My preference would be for awaitReply to return the result and also...

lateinit property mMap has not been initialized I wrote these lines of code and got error Caused by: kotlin.UninitializedPropertyAccessException: lateinit property mMap has not been initialized My method : fun initCameraIdleListener() { var latitude = mMap.cameraPosition.target.latitude var longitude = mMap.cameraPosition.target.longitude myLatLng = LatLng(latitude, longitude) mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(myLatLng, 18f)) }

Detect if a LineString / MultiLineString is inside a Polygon or if it intersects it using JTS library Description So basically what I would like to know is whether a LineString (or MultiLineString) is contained in a MultiPolygon or if it intersects it. I'm not entirely sure that it might affect, but the real case scenario is that I have a LineString that represents a hiking track, and I need to know through which world areas (which would be my MultiPolygons) is that track going through. Or in the case it is inside of one of my world areas, I need to know which area is containing that...

It is safe to send a function as a Serializable param to a new activity/fragment? Recently I found this topic which describes how we can pass an external function to a fragment as a Serializable Param via Bundle (similar approach can be applied to send a function to a new activity) But my question is how safe is this approach? This can be a source of memory leaks? Anyone used this approach in practice?

Kotlin, Android - Position of Viewpager parent (which is a RecyclerView) - Click I got a fragment with a recyclerView, and the item of it it's a cardview that contain a viewpager (which represents a gallery). I'm trying to figured out how I can know the position of the viewpager and recyclerview as well, when I touch the respective element of viewpager. Click of the image: image.setOnClickListener{ val intent_full = Intent(context, FullscreenActivity::class.java)...

SonarQube + Jacoco - Unable to read Koin module test coverage I'm having some issues when trying to import Jacoco code coverage to sonar, this is happening to all Koin modules. Sonar version: 7.5.0.20127 Jacoco version: 0.8.2 Erro: ERROR: Cannot import coverage information for file 'mmaccount/src/main/java/br/com/project/mmaccount/di/AccountModule.kt', coverage data is invalid. Error: {} java.lang.IllegalStateException: Line 84 is out of range in the file mmaccount/src/main/java/br/com/project/mmaccount/di/AccountModule.kt (lines: 83) at...

android studio program compile but dont work hello people i'm learning kotlin on android studio and i may need help here is the code so , the program compile well but don't work on my phone thanks here's the code package i.dal.myapplication import android.content.Context import android.graphics.Color import android.hardware.camera2.CameraManager import android.support.v7.app.AppCompatActivity import android.os.Bundle import android.util.AndroidException import kotlinx.android.synthetic.main.activity_main.* class MainActivity :...

Copy Hashmap of large Objects in Kolin I am trying to create a subhashmap from a huge hashmap without copy the original one. currently I use this: val map = hashMapOf() val copy = HashMap(map) listToRemoveFromCopy.forEach { copy.remove(it) } this cost me around 50% of my current algorithm. Because java is calculating the hash of the job really often. I only want the map minus the listToRemoveFromCopy in a new variable without removing the listToRemoveFromCopy elements from the original list. anyone know this? Thanks for help

Exception flood using .await() when Single throws exception I'm creating integration tests for my application using Spek. I have a set of Providers to test and each one makes a request and parses a response. describe("Providers") { for(provider in providers) { on("Provider: $providerName") { try { //... val responsePromise = when (provider) { is HtmlProvider -> connectionService.reactiveGetForHtml(connectionRequest)...

Provide instance without interface There is way to provide instance without actual constructor calling. class ModelImpl @Inject constructor(...): Model{} @Provides fun model(inst: ModelImpl): Model = inst Is there way to do if there is no interface? Dagger knows already all dependencies for ModelImpl, so it can create an instance.

How to get a custom method inside a block with Kotlin Gradle DSL? I'm migrating one app from Gradle Groovy to Kotlin. This app uses Dexguard, and it uses a method called getDefaultDexGuardFile to load the configuration file. release { signingConfig signingConfigs.upload proguardFiles getDefaultDexGuardFile('dexguard-release-aggressive.pro') proguardFiles 'dexguard-rules.pro' } But when migrating to Kotlin, I cannot find a way to make it recognize this option: getByName("release") { signingConfig = signingConfigs.getByName("upload")...