Can't find Main class in Jar in Kotlin application build with gradle I have a javaFx Kotlin application build with gradle. It's a file containing main method: package com.grined.toptal.invoice import javafx.application.Application fun main(args: Array) { Application.launch(App::class.java) } Gradle file looks like that: version = '1.4' buildscript { ext.kotlin_version = '1.2.41' repositories { mavenCentral() } dependencies { classpath "org.jetbrains.kotlinkotlin gradle plugin$kotlin_version" } } apply...

Kotlin No-arg compiler plugin not working with Firebase How can I allow the plug-in to create no arg constructors for data classes so that Firebase can serialize my data classes? java.lang.RuntimeException: Could not deserialize object. Class it.unito.lamba.projector .data.User does not define a no-argument constructor. If you are using ProGuard, make sure these constructors are not stripped I've applied the plug-in in the top of the app module but neither bottom works. Am i doing something wrong or I've misunderstood what the plug-in...

Parse Data from server using Gson with JSONObject in data I have a data which I receive from the server. { "_id": "5a78263eab294307bebc2e6b", "userID": "PvIMsjink1UcrwXZ4gb899W5Kxo2", "name": "battery", "price": 22, "description": "t", "__v": 0, "boardVisibility": "MainBoard", "date": "2018-02-05T093910.597Z", "picture": { "url":...

How to send a JSONArray in a POST Request in Kotlin? I need to send an Array of JSONObjects from my Android App to an API. I've not found a way to do this with libraries such as khttp and Fuel other than looping over all objects and sending them one by one which I think is very inefficient. So my question is, how can I send an entire JSONArray in a POST request?

kotlinx JSON.stringify ignore null values Is there a way to ignore null values when stringify? Currently it renders as: "field":null it would be great if there is a way that null fields are not rendered at all - but I did not find such an option. Anyone knows how this can work?

Kotlin API reg/login/map Is here anyone who could help me ? Im new in Kotlin programming and I have never worked with API. I have a project in Android studio (using Kotlin) where I have to have Login, Registration and Map via existing API database. I tried to look for some advices but it did not help.

Kotlin JPA plugin with Spring Boot 2 error Having problems starting application with Spring Boot 2 and applied kotlin-jpa plugin. But works fine with Spring Boot 1.5.9. java version - 1.8 kotlin version - 1.2.41 spring boot version - 2.0.1.RELEASE Caused by: java.lang.NoClassDefFoundError: kotlin/reflect/full/KClasses at org.springframework.beans.BeanUtils$KotlinDelegate.findPrimaryConstructor(BeanUtils.java:727) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE] at...

Use JUnit5 Tags for Spek I am trying to distinguish my tests into Unit- and Integration tests. My idea was to use the new JUnit5 Annotation @Tag("unit") which works nicely for my JUnit tests, but I cannot get it to work with Spek. What I currently have is my class: data class MyObject(val value: Int) My tests: @Tag("unit") object MyObjectTest { @Test fun checkEquality() { val o1 = MyObject(1) assertEquals(o1, o1) } } With my build.gradle having: task utest(type: Test) {...

I'm new to kotlin, can any one help how to println(originalList[i]) out side the function fun main(args: Array) { val originalList = arrayOf("sathish", "ramesh", "kumar", "rajesh", "ram", "kom") for (i in 1..1) { var t: Int = ((Math.random() * originalList.count()).toInt()) println("Num $i : " +t) } } println(originalList[i])

java.io.IOException: unexpected end of stream on Connection I am getting this issue with Retrofit but with postman it is working fine. java.io.IOException: unexpected end of stream on Connection{2.test.esb.demoapp.com:80, proxy=DIRECT hostAddress=2.test.esb.demoapp.com/172.16.33.156:80 cipherSuite=none protocol=http/1.1} Calling retrofit api with following method: override fun registerDevice(deviceType: String, deviceId: String, deviceToken: String, description: String): Flowable { val paramObject = JSONObject()...

if condition inside the data class constructor in kotlin I have a data class and I am creating an object of it. I am passing parameter values like this: val leadDetails = AddLeadDetails(AgentId = agent.UserId, Name = leadUserName.text.toString().trim(), MobileNo = leadMobileNumber.text.toString().trim(), ProductType = productTypeId, LoanType = productTypeItem, ApplicationStatus = //if condition to put value Amount =...

Kotlin - Create a new contact Hey guys I'm newbie trying to create one of my first apps in Android Studio (Kotlin) and I didn't find answer for this question. I want to have a list of contacts, where you can create a new contact. After you will fill EditTexts like name, lastname, phone etc. you will click on CREATEBUTTON. And there's the problem. Should I write something like CREATEBUTTON.setOnClickListener.... to create new contact in the RecyclerView? Sorry for me being dumb but I just started with programming

Change XML color programmatically Is it possible to change XML colors via Kotlin/java code. There's only 5 colors in my app, and in the settings you can change the theme. I don't want to change each element to the new color, but I want to change the XML color so all the elements get the new colors. For example: #6c6c6c I want to change it whenever a switch element is ON to #212121 The main Idea is I want all the elements to get their colors from a source.

Main function terminates before coroutines I'm working on a project in a course in process oriented programming. I'm trying to launch two objects (a producer and consumer) in a coroutine, and then let a producer get consumed. I then tell the main function to wait for the coroutine to finish with Job.join(). However, this doesn't seem to work. Because the invokeOnCompletion function is executed before produce/consume cycle has even started. I've included the code and output below and would appreciate any input. This is project in a...

Kotlin: Unchecked cast: Seal Class to it's Child Class (with generic). How to prevent that? I have when on a seal class, where I use to check if it is of certain class, I'll use the data. It has a generic T as seen below. sealed class State object Empty : State() class Load(val presentable: Presentable) : State() class Data(val presentable: Presentable) : State() class LoadableContentController( private val presenter: LoadableContentPresenter) { private var state: State = Empty private fun performSideEffects() { when (this.state) { is Data ->...

Databinding annotation processor kapt warning In my app module's build.gradle, I have added dependencies { kapt('com.android.databindingcompiler3.1.2') ... } but I'm still receiving the compiler warning for app: 'annotationProcessor' dependencies won't be recognized as kapt annotation processors. Please change the configuration name to 'kapt' for these artifacts: 'com.android.databindingcompiler3.1.2'. Everything functions, I just hate having warnings hanging around. Any help is much appreciated!

Is there any limit on number of arguments for data classes in Kotlin? I have a context where, I need 255+ arguments for a data class in Kotlin, which are already grouped at best level. Noticed some exception with 256th field. I was reading java methods can have 255 arguments, which might apply same for Kotlin data class. Please share any idea to solve problem around too many constructor or method arguments. The weird exception I got is: bad class file: (filepath) bad RuntimeInvisibleParameterAnnotations attribute: (some data class constructor related...

Room SQLite Database - Delete all LIKE %:param% I have an issue with Room which I haven't been able to find help for elsewhere - the usual '%' for matching any number of characters when using 'LIKE' in SQLite doesn't work with the Room delete query we are using in my team's project. We have a delete query defined as a string in Kotlin, in one of our DAOs: const val DELETE_BY_RESERVATION_CODE = "DELETE FROM ${TdaRoomDatabase.TABLE_REQUESTS} WHERE uri LIKE :reservationCode" And a deleteRequest in the same DAO:...

Mark on PDF Android App I'm currenty developping an application on Android with AndroidPDFViewer : https://github.com/barteksc/AndroidPdfViewer I want to create a fonctionnality, when the user touch the screen, it put a point on the PDF at this location. After I want to mesure the distance between 2 points but it's an other problem. I don't understand how to do this funtionnality, put a point on PDF. I found this : <a...

Why does my Kotlin Gradle build die with exit code 137? We were seeing mysterious failures in our CI environment when running tests of a Kotlin code base. gradle test compiled the code and the tests just fine. The tests ran and all appeared to pass. But then Gradle exited with code 137 (indicating it was killed with SIGKILL) and the CI system thus thought the build had failed. Limiting the size of the JVM for Gradle didn't help. Nor did the --no-daemon and --max-workers options. This is using Kotlin 1.2.40 and Gradle 4.3 on the Java 8 JVM.

AsyncTask use in Kotlin I have a problem with AsyncTask in Kotlin , I'm actually new so please be cool :) So the problem here , is that I would like to use the result value which is in onPostExecute(), in another class Let me show you my code, Here is ProviderAsync() class in my Provider.kt file ( I just create an array of Hashmap which I want to use) : class ProviderAsync() : AsyncTask() { var allThings: ArrayList = arrayListOf() override fun doInBackground(vararg params: HashMap): ArrayList? { for (i in...

cannot create SubscribableChannel in Kotlin This works in Java: SubscribableChannel c = MessageChannels.publishSubscribe().get(); converted to kotlin (by IntelliJ) this becomes: val c : SubscribableChannel = MessageChannels.publishSubscribe().get() I cannot find a Type that can satisfy the requirements for "S" The signature or publishSubscribe is: public static PublishSubscribeChannelSpec publishSubscribe() what can satisfy when S recursively depends on S? And why isn't this a problem for Java?

Using the movie database poster_path to setImageResourceID I'm trying to populate my RecyclerView with the poster image from the JSON data. setImageResourceID takes an int but the JSON data returns a String. I looked at the Picasso examples but those are populating the photos to imageViews, whereas I'm trying to bind them from the onBindViewHolder method. This is the method in my QueryUtils.kt file that extracts the JSON data: object QueryUtils { ... private fun extractFeatureFromJSON(jsonResponse: String?): List? {...

Get runtime class of a generic type parameter in Kotlin without reified keyword Kotlin provides a way to get runtime class of a generic type parameter with reified keyword which can only be used with inline functions. For example the following works: inline fun test() : T { println(T::class.java) } However, I need a way of doing this in a non-inline function. Since the reified keyword is not an option for non-inline functions, the following does not work: fun test() : T { println(T::class.java) } Does Kotlin have a different method to solve this problem? I...

Adding two Double values in Java or Kotlin [duplicate] This question already has an answer here: Is floating point math broken? 23 answers While doing some problem, I randomly got into a situation where a simple addition of two double values failed. fun main(args: Array) { println(1.2 + 13.2) //Output - 14.399999999999999 } Initially I faced...

RecyclerView shows only 10 itens I making an aplication for read rss aticles and i dont know why my apllication show only 10 itens in your recyclerview, in te file of contains more 10 itens ... In the future I will implement my aplication search in multiple sites, and with 10 itens i can't make this rs This is my code... My Activity public class InicioFragment extends Fragment { // TODO: Rename parameter arguments, choose names that match // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER private static...

Android - Fragment called by Bottom navigation tabs is reloading every time I am creating a project which uses bottom navigation. I am using fragment to make tabs call val transaction = supportFragmentManager.beginTransaction() transaction.add(R.id.frame_layout, Fragment1.newInstance(),Fragment1.newInstance().TAG) transaction.addToBackStack(null).commit() bottomNavigationView.setOnNavigationItemSelectedListener(object : BottomNavigationView.OnNavigationItemSelectedListener { override fun onNavigationItemSelected(item: MenuItem): Boolean {...

Cannot find module 'react-transform-hmr/lib/index.js' After installing React native, I run following command: $ react-native init demoApp And got this error: Error: Cannot find module 'react-transform-hmr/lib/index.js' at Function.Module._resolveFilename (module.js32515) at Function.require.resolve (internal/module.js1619) at makeMakeHMRConfig7 (/home/local/MPLLC/malwinder.singh/demoApp/node_modules/react-native/node_modules/metro/src/babel-bridge.js12031) at Object....

SetOnClickListener not working in Button SnackBar I'm using a fragment and I setted a custom snackBar with some buttons but the listeners doesn't work. Here is the code of the custom SnackBar var snackbar = Snackbar.make(activity.findViewById(R.id.main_content), "", Snackbar.LENGTH_INDEFINITE) var layout : Snackbar.SnackbarLayout = snackbar.getView() as Snackbar.SnackbarLayout val textView = layout.findViewById(android.support.design.R.id.snackbar_text) as TextView textView.visibility = View.INVISIBLE...

Get notified of variable change using PropertyChangeSupport(e.g. observable, delegate) I have this kind of issue I would like to listen to variable change. Lets take I have var foo:Int = 10 initialized and in the code somewhere it changes its value to something else lets take foo = 99 here is my code snippet in kotlin. var foo:Int=10 private val changeSupport: PropertyChangeSupport? = PropertyChangeSupport(foo) val observer = { property: KProperty, oldValue: Int?, newValue: Int? ->...