How to listen to socket io in kotlin I have an application that in server side we configured a socket.IO for it. and I want to connect my application to that, listening to server when an event happened ,then my application Log a message in android side. I have a BaseActivity that all of my activities extends from that. and in BaseActivity I setup Socket.IO: protected var mSocket: Socket? = null try { mSocket = IO.socket("http://myDomain.co") } catch (e: URISyntaxException) { }...

Why is it that LoadParams.requestedLoadSize returns the specified page size to LivePagedListBuilder times 3? I am creating a PagedList using: LivePagedListBuilder(dataSourceFactory, 20) Inside my implementation of PageKeyedDataSource, loadParams.requestedLoadSize returns 60. I tried with other numbers, and it seems that loadParams.requestedLoadSize always returns the page size I specified times three. Anyone has any idea as to why this is happening?

How to show the App Name in the right side of actionbar?(Kotlin) I'm working on a project in Android Studio with Kotlin language. I want the app name to be on the right side of the actionbar. How is it possible? Thanks.

RxJava or RxKotlin for Android? My project is in Kotlin, but RxJava has a lot more learning resources available, and it is supposed to be fine to mix Java with Kotlin. Down the road, should I use RxJava or RxKotlin? What are some of the catches to watch out for when use RxJava in Kotlin project

search an aar file name in libs with java or kotlin I try to search my libs content in Android project for a specific AAR file name with java or Kotlin code. I searched a lot but can't find an answer. I appreciate your help.

create a Spring Bean from Kotlin property I'm using Kotlin for a Spring application (not Spring Boot), and I would like to create a Bean from a property. It started out as a function with a separate backing field private val _guessCount = 10 @Bean open fun guessCount() = _guessCount But then I started looking for a more concise way: @Bean open val guessCount: Int = 10 ... which throws an exception Kotlin: This annotation is not applicable to target 'member property with backing field' So I tried it by using the get...

Convert TripleDESCryptoServiceProvider to javax.crypto.Cipher I'm trying to convert a encryption method from VB to Kotlin, but my results are not the same. In vb it is implemented like: Public Shared Function MD5Hash(ByVal value As String) As Byte() Dim byteArray() As Byte = ASCIIEncoding.ASCII.GetBytes(value) Return MD5.ComputeHash(byteArray) End Function Public Shared Function Encrypt(ByVal stringToEncrypt As String) As String Dim FvaRetorno As String = "" Try TripleDES.Key = MD5Hash(key) TripleDES.Mode =...

Error with php query login with kotlin [duplicate] This question already has an answer here: Can I mix MySQL APIs in PHP? 5 answers So I'm doing a Kotlin application and I needed to add a login/register, for some reason the register works but the login does not. the only difference in the login is that: $sql = "INSERT INTO User (Code, Name,...

Using SignalR in Kotlin I'm starting work with Kotlin as my new language for android application development And I need to work with SignalR library for sending and receiving messages from the server. I found this link for working with java language but nothing for Kotlin.

double check andorid studio in list view I have a problem developing Android application The project is being developed in Android Studio, with the programming language Kotlin I was trying to implement a custom adapter to a list, however when I run the program a selection error is generated, this error is as follows: When one of the boxes is selected, with an id n, if n is odd, all the odd boxes are marked, and it happens the same when n is even, all the boxes with the same id are marked. I attach the code of the template, the...

Spring oauth security configuation with kotlin I am converting a java / spring project to kotlin and i have a problem with oauth configuration. In Kotlin my overrided function loadUserByUsername is not used. Instead, it uses the one from the ClientDetailsUserDetailsService from oauth Spring dependency. I have the impression that one of my configuration is not taken into account but when launching the application it seems they are well instantiated. my configuration classes: @Configuration @EnableAuthorizationServer class...

Webview shows white page with error in Logical, but URL works fine when opened in Chrome So I have the following method to load a page on what part of my app. The page it's opening to is an Angular 2 app if that makes any difference. If I put a breakpoint and copy this URL into chrome in my emulator the page opens fine, but it doesn't in the app. fun loadInbox() { inboxView = this.fragmentView!!.findViewById(R.id.webview_inbox) inboxView!!.webViewClient = object: WebViewClient() { override fun onPageFinished(view: WebView?, url: String?) {...

Android MVVM with Architecture Components: Alternative to using ViewModel across multiple activities I am currently developing an app using MVVM and Android Architecture Components. I'm currently experiencing a dilemma of sorts with the usage of ViewModel. Here's the problem: My app has a MainActivity that contains four different "tools" that can be interacted with with limited settings. The idea is that all four of the tools should be able to used at the same time on the MainActivity. However, if a user wants to use just one of the tools with more advanced control and settings, they can...

How to cast CharArray to Array<Char> in Kotlin What happens is that "mystring".toCharArray() returns a CharArray but I need an Array. Why CharArray exists? what's the idea behind it? How can I cast a CharArray to Array? I found one way to make it Array "mystring".toCharArray().map { it }.toTypedArray() but is there any other way to do it?

when add MathView Library my recyclerview Steal work When i add MathView library my recyclerView make a Steal scroll. Before add MathView my recyclerview working smooth and fast but when i add MathView Library its working slow and Stealing. I used this Library for MathView :- implementation 'io.github.kexanie.libraryMathView0.0.6' MathView Library Link :-https://github.com/kexanie/MathView

Android Studio 3.1.0: Kotlin: java.net.ConnectException: Connection refused: connect I have created a kotlin demo application in my android studio 3.1.0 and I am getting following errors.. Caused by: org.gradle.internal.exceptions.LocationAwareException: A problem occurred configuring root project 'MyKotlin' Caused by: org.gradle.api.internal.artifacts.ivyservice.DefaultLenientConfiguration$ArtifactResolveException: Could not resolve all files for configuration ':classpath' Caused by: org.gradle.internal.resolve.ArtifactResolveException: Could not...

Cucumber DuplicateStepDefinitionException I have two feature files: first/first.feature and second/second.feature. Also, I have two step definitions files, which are in package1 and in package2 respectively. So I can run first (or second) feature test with specific glue and features configuration. But if I want to run both features I get cucumber.runtime.DuplicateStepDefinitionException. Can I create such configuration that enables me to run all my feature tests? Maybe with providing glue-feature pairs (or map?). BTW I use this...

Date and time in Android studio (Kotlin language) My friends and I are developing an app in android studio using Kotlin. We are quite new in app development but we have decent prior programming skills. For one of our functionalities we need to get current date and time. We tried all kinds of imports and methods, but none seem to work with SDK lower than 26. With our app we target devices with minimum API 19. For example: package hr.com.wap.wap import android.support.v7.app.AppCompatActivity import android.os.Bundle import...

returning a custom Array list an getting it in fragment I have created a class for all API calls, and when I call a method in that class it will return a custom ArrayList. from that returned list i want to extract only the vehicle names ApiCalls.kt class ApiCalls { val client = OkHttpClient() val list: ArrayList? = null public fun getEnquiryList(id:String): ArrayList? { return null } public fun getVehicleList(): ArrayList { val body = FormBody.Builder() .build() val request = Request.Builder() .post(body)...

Should we separate Entity from Pojo when using Room and how to insert list to db? I am implementing caching with Room and have came across several questions: 1.Is the Entity should be the same as pojo? I would make them separate... the issue here that in my view I use Pojo and in Repository is Entity all the way around. I solved this by converting Pojo to Entity and use entity elsewhere in the app(ViewModel->View->Adapter->ViewHolder) See the repository code below: public List pojoToEntity(List list){ List photos = new ArrayList(); for(Photo photo : list){...

remoteMessage.getNotification() is always null when notification is sent from server - Android In my project, I need to send a notification from server to client. I am able to send notifications from FCM console but when I send a notification from server to client, remoteMessage.getNotification() always return null. While data is received correctly. When I send both data and notification only data is a non-null while the notification is null. I already checked <a...

LiveData with Room does not work when updating an entity I have this app where I constantly update a Contact entity using room. The update code is as below @Update(onConflict = OnConflictStrategy.REPLACE) fun updateContact(contact: Contact) This is in the ContactsDao. I have a live data attached to a fragment such as mViewModel.getContacts().observe(this, Observer { if (it == null || it.isEmpty()) { layout_empty.visibility = View.VISIBLE fab_menu.visibility = View.GONE...

while updating object several times, only last object is updated. I want all update operations to be executed I'm new to vert.x framework and rx-java. I'm working with mongoDB currently. The problem is that I have to update same object several times, however only last update being executed. Code is provided below. findByProductId method returns required object. check is done as it might return false if object by this id is no in db yet. fun cancelProductStateCountList(inventoryList: List) : Observable { return Observable.create({ event -> val count = inventoryList.count() var...

Json deserialization/serialization without changing naming in one way I have been wondering if there is a possibility to automatically deserialize json to specific object properties, and serialize it with different names without implementing any custom deserializer. I am working on integrating my app with Github API and their naming convention is something I would like to remodel. Once requesting resources I get something like: { full_name: "...", description: null, clone_url: "...", stargazers_count: 0, created_at: "2018-06-05" } but I would like to...

how to convert kotlin set to java in android There is kotlin set code as following: val CITIES_WITH_LOGIN_ENABLED = setOf(CustomCity.MUNICH, CustomCity.BERLIN, CustomCity.SAIGON, CustomCity.TESTMUNICH, CustomCity.TBILISI) I want to convert that code to java. What must i do?

Kotlin RecyclerView in Fragment - Navigation architecture component - null error I am trying to create a RecyclerView in a fragment but I am getting a null error on the RecyclerView. I was able to create the fragment successfully using the new Navigation architecture component with a bottom navigation bar. I am running Android Studio canary 3.2 Beta 1. Note sure where I have gone wrong as I am not getting any red lines in Android Studio. Debug Error E/AndroidRuntime: FATAL EXCEPTION: main Process: com.projects.arise.mytestapp, PID: 28285...

Kotlin Incompatible type inside callback? Getting an error when trying to call a method inside a callback Incompatible type: Unit and Int fun numberEntered(number: Int) { } class ClickListener(val activity: PasscodeActivity): View.OnClickListener { override fun onClick(view: View) { this.activity.numberEntered(0) // error return } } Also is it possible to access the outer activity without passing as a param? In java I was doing PasscodeActivity.this.numberEntered(0)

How to conver ARP cod eof JAVA to Kotlin in Android I am trying to get all the mac and IP from my android using the following code. But the following code only works in java. I want to use it in kotlin so I tried java to kotlin converter. But it didn't work. could anyone tell me how the following part of the code will be used in kotlin: listNote.clear(); BufferedReader bufferedReader = null; try { bufferedReader = new BufferedReader(new FileReader("/proc/net/arp")); String line; while ((line =...

Kotlin recursion stack overflow I have written this recursive function in Kotlin: fun recursive(target: String, population: Population, debugFun: (String) -> Unit) : Population { if (population.solution(target).toString() == target) { return population } debugFun.invoke(population.solution(target).toString()) return recursive(target, population.evolve(target), debugFun) } It will run an indeterminate amount of times (because I'm using randomness to converge on solution in evolutionary algorithm)....

App crashes when implementing a simple textview in Kotlin/xml when textView_hourly is set to any value the app will build successfully but will crash when opened. This is not in my MainActivity. I am implementing this activity as a fragment to be placed within the main activity through a ViewPager. class HourlyActivity : Fragment(){ override fun onCreateView(inflater: LayoutInflater?, container: ViewGroup?, savedInstanceState: Bundle?): View? { textView_hourly.text = "yo" return...