Animate a ChoiceChips' background color on selector state change I'm trying to achieve a choice chip group like shown in the material documentation: Link to Animation Video Currently, I'm just using a selector as a background drawable: Switching those colors...

Mocked suspend function returns null in Mockito I have a suspending functions that I have mocked, using Mockito but it is returning null Example 1 here is my test in which the mock is returning null @Test fun `when gps not enabled observer is notified`() = runBlocking { // arrange `when`(suspendingLocationService.getCurrentLocation()).thenReturn(result) // observer?.onStartShop(StoreData(), APIError(APIError.ErrorType.GPS_NOT_ENABLED)) result.latitude != null && result.longitude != null ->...

Androidstudio to Kotlin to Swift? I'm working on a project whereby we're creating an app for people to call/message one another. We're currently developing in Androidstudio, java, but even after we've launched the app, it seems that most of our interested users are on iOS instead. Is it possible for us to convert Java > Kotlin and use Kotlin Native for our iOS app? I mean, if it's possible we'd like to use a way that wouldn't need us to use too much Swift, since we're a bunch of undergrads who's doing this on interest and...

How fix AndroidManifest.xml I have error in AndroidManifest.xml in kotlin android studio I did clean , rebuild and sync but I don't know what happen in app the error [Fatal Error] AndroidManifest.xml6219: XML document structures must start and end within the same entity. my AndroidManifest.xm

static environment object build dependant transcode from swift to kotlin In iOS I am using a struct with only static elements to group all environment datas together such as constants and globals (its much more readable in code that way and it allows to have some hierarch in it). Some of these datas are dependant on the build being PROD(action), DEV(elopement) and ACC(eptance); I solve this by having different targets in xCode and using a specific extension file that is only included for the matching PROD, DEV and ACC target.This works extremely nice in...

RecyclerView list gone when scrolling down I'm trying to make a multiple view in my recyclerview, but when i scroll it the data is gone and the list form is messy and it don't stop even if the data was finished. so i don't know what is going on. but i think there is problem in my adapter but i have no idea what it is. My Adapter class MainAdapter(val teamFeed: LastActivity.TeamFeed) : RecyclerView.Adapter() { override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder { return...

Android Bottom Navigation View item title, not shown all text I want to show all of the text below the icon.Please help. Thanks its my navigation menu xml;

Calling child class function from parent abstract class array in java/kotlin I have this arraylist of GameObjects. I loop through the arraylist, and if the type of the object is door (one of the GameObject's child classes), and if some other conditions match up, i want to call a function from the door class thats only in that class. Is this possible? I'm using Kotlin, but if you only know java i could probably port it.

Why do bindings in JavaFX work in the way they do? I'm trying to understand why data binding works in the way it works in JavaFX. It lets you bind ObservableValues to other ObservableValues like this: val prop0 = SimpleStringProperty("xul") val prop1 = SimpleStringProperty("baz") prop0.bind(prop1) When I do this both properties will have the value baz. I can also chain bindings: val prop0 = SimpleStringProperty("xul") val prop1 = SimpleStringProperty("baz") val prop2 = SimpleStringProperty("qux") prop0.bind(prop1) prop1.bind(prop2) //...

Extending a Kotlin class with a primary and secondary constructor I'm trying to extend a class that has a primary and secondary constructors. The reason being, I want a private/protected primary constructor that has fields which are common between two secondary constructors. This works fine for the base class, but extending that class doesn't allow me to do that. Here is an example of what I want to do: abstract class A constructor(val value: Int) { var description: String? = null var precision: Float = 0f constructor(description: String,...

BottomSheet click fires through I have a BottomSheet with some non-clickable content. This BottomSheet is sliding over a RecyclerView. Problem is when I tap on the BottomSheet, the RecyclerView item behind it fires (which of course shouldn't happen). The list also scrolls when scrolling on the BottomSheet. I've tried to set android:clickable=false on the container of the BottomSheet with no effect. Is there an obvious trick for preventing that?

Why am I not able to import antlib? I have imported the following kotlin libraries: However when I try to use antlib in build.xml I get the following error: [typedef] Could not load definitions from resource org/jetbrains/kotlin/ant/antlib.xml. It could not be found Am I using wrong kotlin version ? What could be wrong here ?

How do I change a fragment's view/button's visibility from an activity? As the title suggests, I'm trying to change a fragment's view/button's visibility from an activity. Fragment's code: package nus.is3261.kotlinapp import android.content.Context import android.os.Bundle import android.support.v4.app.Fragment import android.view.LayoutInflater import android.view.View import android.view.ViewGroup import android.widget.Button // TODO: Rename parameter arguments, choose names that match // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER...

How to reference a TextView from a child class I have got an activity (Payroll) that calls a class (GetJsonObj) that gets info from a database to be placed on TextViews in Payroll activity. How can I reference these TextViews from GetJsonObj class? I've tried a number of different syntax with no luck such as: val dt = Payroll().findViewById(dateTV[i]) as TextView

Remove Warning of Variable Shadowing in Kotlin I couldn't find this info anywhere else. Variable shadowing is a great feature in my opinion, yet in Kotlin we get warned for it every single time, thus requiring us to use @Suppress("NAME_SHADOWING") in every instance of it, if we wouldn't like it to warn us. Is there a way to disable variable shadowing verifications, or suppress the warning globally?

Room creates an entity on selection I need to check if my row is exists in the database but the Room creates this row automatically. Below my DAO: @Dao interface SubjectDao : BaseDao { @get:Query("SELECT * FROM ${Subject.TABLE_NAME}") val all: LiveData @Query("SELECT * FROM ${Subject.TABLE_NAME} WHERE ${KeyEntity.K_ID} = :id") fun getById(id: Int): LiveData @Query("SELECT * FROM ${Subject.TABLE_NAME} WHERE ${Subject.K_NAME} = :name") fun getByName(name: String?): LiveData } Repository: class...

inflating a layout in recyclerview in horizontal and vertical I have a layout that is inflated in an activity. Now all the info are displayed in vertical as shown in the following. but what I want it to be is three textView should come horizontal and then next three should come as a next row and so on. I have posted the way it should look at bottom.<a href="https://i.stack.imgur.com/Tp4do.jpg" rel="nofollow noreferrer">this is how I want it to look...

Custom api request in kotlin I'm trying to work with AerisAPi but I stucked on GET request. I have to provide location but i have no clue how to do that. Here is how request looks like. I have no clue how to put city into [:action]. https://api.aerisapi.com/[:endpoint]/[:action]?client_id=[ID]&client_secret=[SECRET] Here is my code: WeatherApiService @GET("forecasts/") fun...

How to make dynamic Gson key for serialization value ? If any suggestion , would be appreciated How to resolve the issue to making GSON dynamic key?

how to inject data class by koin i'm a new in Koin Dependency Injection.i have a problem by data class inject. data class: data class CoroutinesDispatcherProvider( val main: CoroutineDispatcher, val computation: CoroutineDispatcher, val io: CoroutineDispatcher ) and viewModel need this data class: class MyViewModel(private val dispatcherProvider: CoroutinesDispatcherProvider):ViewModel() { } and finally module is: val appModule = module { single { (main: CoroutineDispatcher, computation: CoroutineDispatcher, io:...

Access Kotlin Standard Library from Swift In my Kotlin Multiplatform project, I'm trying to access Kotlin types defined in kotlin-stdlib from Swift. My scenario looks like this: I have an interface defined in Kotlin ... interface MyKotlinInterface { fun run() : Sequence } ... and implemented this interface in Swift ... class MySwiftClass : MyKotlinInterface { func run() -> KotlinSequence { // return sequenceOf("foo") } } ... there I'm trying to create a Sequence but there are no methods from the kotlin.sequences...

onClick(CoroutineContext) Unit is deprecated Kotlin I have migrated my project to Kotlin 1.3 and then it is showing this Was that means we have to use the again the long and old fashioned setOnClickListener method or they have introduced some another method. And why they are dropping it?

Why cannot my build file cannot resolve withKotlin task? I tried replicating steps mentioned here: Here. When I do it my in build.xml file in IntelliJ I get the following error: Cannot resolve symbol withKotlin

NoClassDefFoundError For MyClass$DefaultImpls when writing default method for interface in Kotlin I have an interface MyInterface in Kotlin with some methods that some of them have a default implementation and I have a class MyClass that implements MyInteface.Now when I run my code, I got the following error. java.lang.ClassNotFoundException: myPackage.MyClass$DefaultImpls I test it in a small project but it worked, but I have no idea why It doesn't work here. I build using Gradle and previously everything was OK. The problem starts when I convert MyInteface from Java to Kotlin. I...

What does single variable name in lambda closure? I had method that get data from database to list using Anko library. I can't figure out what mean single variable name after lambda (i.e dataList in the end of the function). How it's translate to Java? Code: fun gerData() : ArrayList = context.database.use { val dataList = ArrayList() select("TipList", "task", "id") .parseList(object: MapRowParser{ override fun parseRow(columns: Map): List { val...

How to dynamically add bitmaps to custom canvas from main activity via new object So I've created a custom view that simply allows me to move a bitmap around the screen wherever I drag. Code here: class TestPointGrid(context: Context, attributeSet: AttributeSet) : View(context, attributeSet){ private var mPointerX: Float = 0F private var mPointerY: Float = 0F private val testPoint: TestPoint = TestPoint(context, 1) override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) { setMeasuredDimension(MeasureSpec.getSize(widthMeasureSpec),...

How to pass String url into URL of kotlin? The statement val address = URL("http://192.168.43.22:5000/post_message") Throws the error Expression 'URL' of type 'String' cannot be invoked as a function. The function 'invoke()' is not found I cannot figure out why this happens. I have searched internet for an hour and came up with nothing.

KOTLIN No field host in class Ljava/net/URL when I'm trying to request API with khttp i'm having this issue in emulator on Android Studio with SDK 28 (Android Pie 9.0) E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1 Process: com.example.corentin.myapplication, PID: 3168 java.lang.RuntimeException: An error occurred while executing doInBackground() at android.os.AsyncTask$3.done(AsyncTask.java:354) at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:383) at...

Firebase Unresolved Reference I have implemented Firebase database by included assistant. It added to my gradle dependencies implementation 'com.google.firebasefirebase database16.0.1:15.0.0' after that, I couldnt build the procject (solution was to change impelentation into kapt) My gradle looks like: dependencies { kapt 'com.google.firebasefirebase database16.0.1:15.0.0' implementation fileTree(dir: 'libs', include: ['*.jar']) implementation...

Default activity not found - Nothing solves this problem I can't find the default activity when running my new app, I also can't find what's the issue in my manifests. I tried to read a lot about this but nothing of those similar problems seemed to help me out. This is what my manifests look like: