When statement not recognising current drawable in view holder on click For an onBindViewHolder function of mine, I'm trying to detect if a specific drawable is present within an ImageView but for some reason, the detection is not working properly. Why does the else part of the statement always get executed when the drawable clearly shows a down arrow and the first part of the statement never works? I've already followed <a href="https://stackoverflow.com/questions/23357706/how-to-check-which-current-image-resource-is-attached-to-imageview-in-android-xm">this...

Okhttp3, FileNotFoundException on retrofit2 POST, what is the real problem? As i'm showing a part of the code below, i'm trying to POST image with retrofit2. Android Studio I really can't understand what is the error, hope someone cud help me with this problem. Imge service* import okhttp3.MultipartBody import okhttp3.RequestBody import okhttp3.ResponseBody import retrofit2.Call import retrofit2.http.Multipart import retrofit2.http.POST import retrofit2.http.Part interface ImageUploadService { @Multipart @POST("uploadfile") fun saveImage(...

Dagger2 and Architectural Components - Kotlin compiler error I tried to build following project but I receive some errors: https://github.com/bufferapp/android-clean-architecture-mvi-boilerplate 1 - Kotlin compiler error : error: no interface expected here public class ViewModelFactory extends android.arch.lifecycle.ViewModelProvider.Factory { ViewModelFactory is as follow: @Singleton open class ViewModelFactory :...

BottomSheetDialog Empty on Lollipop Android API-22 I have a BottomSheetDialog in my app for which I set the content manually. It works fine with anything over API 22, but for 22 it just shows a blank space with nothing inside it. I also tried adding other layouts apart from GridLayout, but seems like those are no good either. val fontSizesGrid = getPickerGrid(1, context) for (i in 0 until fontSizes.size) { val fontButton = ceateFontSizeButton(fontSizes[i], pageLayout, context)...

Why is arrayOf() the same as mutableListOf() but limited? Trying to understand what the point was when making arrayOf() the same as mutableListOf() but removing features such as add() and remove()?

How to create array of ImageView by providing size in Kotlin I have the following method in java and works well in my code. But I just want to rewrite my activity to kotlin. My java methods: private void testFunction() { ImageView[] pics; int count = 6; pics = new ImageView[count]; } By converting it automatically with Android studio the following fun is produced but with error: private fun testFunction() { val pics: Array val count = 6 pics = arrayOfNulls(count) } How can I archive the same result?

Text written via handwriting input not being entered into EditText on WearOS I'm writing an app for WearOS that contains an EditText component. When I write any text into the text field using the keyboard, it stays in the textbox when the keyboard closes, but when I use the handwriting input and click the check mark to input the text, it disappears completely. I am totally stumped at the moment. I have checked the Logcat and found the following error: E/SpannableStringBuilder: SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length That error only occurs when...

Menage BottomSheetDialog Behaviour in Android Jetpack (Kotlin) How to menage the Behaviour of a BottomSheetDialogFragment with thew new 28 API? (Android Jetpack). Thank you.

"ping" a server with .isReachable multiple times in Background So my goal was to display if a server was up or not I udelised the famous InetAddress.getByAddress(ip).isReachable(2000) throught an AsyncTask and everything worked , but avter , I realised that I hab to run it multiple times to check the connection at different points, but I cant bevause of the nature of the AssyncTask So can someone help me with that, here are my different files : import android.os.AsyncTask import java.net.InetAddress interface AsyncResponse { fun...

Which import do i require to make use of hashrouter in KotlinJS React App I'm bootstrapping a KotlinJS + React application using the following steps: npm install -g create-react-kotlin-app create-react-kotlin-app frontend cd frontend npm install kotlinx-coroutines-core npm install @jetbrains/kotlin-react-router-dom This gives me a basic KotlinJS + React app In package.json i can see my router import { "name": "frontend", "version": "0.1.0", "private": true, "dependencies": { "@jetbrains/kotlin-react-router-dom": "^4.3.1-pre.61",...

"No set method providing array access" -- why does this happen in Kotlin? Here's the code. val stack = Array(inputString.length + 1) { "" } var current = 0 for ((i, char) in inputString.withIndex()) { if (char == '(') { current += 1 continue } else if (char == ')') { val enclosedString = stack[current] stack[current - 1] = stack[current - 1] + enclosedString.reversed() current -= 1 continue } else { stack[current] += char //here's the compile...

is it possible to use kotlin on the JVM or Android without a dependency on kotlin-stdlib? I have an android library that I distribute as a jar file; Currently it has zero dependencies (other than the things built into Java itself). I like the idea of porting it to kotlin, however I haven't been able to figure out how to do this without forcing a dependency on kotlin-stdlib (or kotlin-stdlib-jre7, etc) I'm somewhat wary about doing this, because kotlin-stdlib gets updates very frequently (multiple times per month sometimes) and I don't want to cause a future compatibility...

Android: OnTouch why is event.getY shifted when nearing edge of screen I set a touch listener on my GLSurfaceView which passes the touch event's X and Y coordinates to a function that then draws a circle at the point of contact. Problem is that as I tap my finger away from the center along the y-axis, the registered y-coordinate gets offset further and further away from the actual point of contact on the screen. I have tried to use the regular y-coordinate and the rawY-coordinate, both are the same. I also used DisplayMetrics to see if a different y-dimension...

Cannot use type T as a reified parameter, use class instead Android Studio 3.4 Kotlin 1.3.10 I have the following method that calls findPreferences to return the correct value that is stored in shared preferences. However, as I am using reified the findPreferences give me an error: Cannot use type T as a reified parameter. Is there anyway I can get this to work? fun getValue(key: String, defaultValue: T?): T { return findPreferences(key, defaultValue) } This is the method that will return the value based on the key...

Android, Kotlin : How to invoke MainActivity's method into sub class method in case of kotlin? I am trying to invoke a MainActivity's method from a sub class. Look my code bellow. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) } open fun action(v: View){ sub_class().test() } private fun toast(s: String){ Toast.makeText(this, s, Toast.LENGTH_SHORT).show() } class sub_class{ open fun test(){...

MockK mock method returning Interface Future Hello I have following problem. I am trying to mock call of injected executor to execute given Callable immediately. Later in test arguments of methods called inside Callable are captured and arguments are asserted. Mock example see bellow. Maven 3, jdk 10-slim, mockk 1.9 //this task should be executed by executor private val taskCaptor = slot() private val asyncTaskExecutor: LazyTraceThreadPoolTaskExecutor = mockk().apply { //this was my 1st try, but resutt was...

Using a secondary constructor in Kotlin I get the error: Expecting member declaration class MyAdapter(val context: Context) { constructor(context: Context, itemInfos: List): RecyclerView.Adapter { } } What am I doing wrong?

Kotlin easily access resources outside of an activity I'm new at Android and Kotlin. I'm trying to create a ResourcesHelper class to easily access my custom colors and fonts from any other custom class in my app. But in this helper I don't have any context. I've read ways to get the context extending the Application class but then compiler says I can't access this context in my ResourcesHelper companion object as it would create memory leaks. Also I ended up with optional chained. Here is how I would like to be able to use it : class...

Firestore DocumentReference Serialization I have a pojo which maps a firestore document. That document contains references to other documents of other collection. class Game(var local: String? = null, var visitor: String? = null, var events: MutableList = mutableListOf(), var date: Date? = null): Serializable The problem is that DocumentReference isn't serializable. I've read that I can save the path as String and then create the object myself(FirebaseFirestore.getInstance().document(path)), but then in the firestore is...

Kotlin lateinit not working with @Inject annotation I am new to dagger 2 and kotlin both. Getting lateinit property not initialized. I have a module which have few @Provides methods but one of the class not able to create object which used @Inject and lateinit. Login service takes "LoginAPI" as parameter and works fine but as i want all my login related API's to use the same service. There is one more API related "LoginWithOrgAPI". Now my need is to get any API object when needed in the LoginService class. So i tries using lateinit with...

Socket.io on Android I’m building an app that requires bidirectional communication with the server and as such I’m thinking of using socket.io. The problem is this connection will only be required when a web user starts it, so when my web user starts a chat for example then messages should start going to the android app and back. As such the android application has no control over when it needs this socket connection to be live. So as I see it I either connect the Android app to the server via the socket...

IntelliJ Kotlin multiplatform project Gradle sync very long I've created a new Kotlin Multiplatform project for Andrid and iOS (Mobile shared Library). The project works fine but every time I run Gradle sync, it takes more than 2 minutes and always stuck on the same line: Gradle: Build model 'org.jetbrains.kotlin.gradle.KotlinMPPGradleModel' for root project 'MyProject' Why is it taking so long evey time? I'm using Gradle version 5.1. Here is my build.gradle file: buildscript { ext.kotlin_version = '1.3.11' repositories {...

Android val cannot be reassigned I defined a variable called notes, when i try to modify it from a method, android studio says "val cannot be reassigned", however i can modify it if i access the variable like this "this.notes". class NoteAdapter(var context : Context) : RecyclerView.Adapter(){ private var notes = emptyList() override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): NoteViewHolder { var itemView = LayoutInflater.from(context).inflate(R.layout.note_item, parent, false) return...

Android Grid View crashes on android version kitkat I have created an gridView to show Images in it. here is my code : import android.content.Context import android.support.v7.app.AppCompatActivity import android.os.Bundle import android.view.View import android.view.ViewGroup import android.widget.* class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) val gridview: GridView = findViewById(R.id.gridview)...

Transactions with ReactiveCrudRepository with spring-data-r2dbc I'm trying to implement transactions with spring-data-r2dbc repositories in combination with the TransactionalDatabaseClient as such: class SongService( private val songRepo: SongRepo, private val databaseClient: DatabaseClient ){ private val tdbc = databaseClient as TransactionalDatabaseClient ... ... fun save(song: Song){ return tdbc.inTransaction{ songRepo .save(mapRow(song, albumId)) //Mapping to a row representation...

return right and wrong position from 2 given string by comparing Let say ,I have 2 string ABCA and AAAB then I need to return the right position of character. For example ABCA is first string and AAAB is the second string ,the condition is you can only compare from second to first string and the size of string only 4. when we compare with the 'A' and 'A' then we count this as a right position when we compare with second character 'A' with 'B' then it don't match then we look 'A' into first string and we found 'A' is present in first string then we...

Timepicker not displaying the title on android I have tried to set the title to the time picker dialog, even though i specify my time picker title to be the custom string like this val startTimePickerDialog = TimePickerDialog(context, timePickerStartTimeDialogListener, 24,0, true) startTimePickerDialog.setTitle(context.getString(R.string.rule_start_time)) startTimePickerDialog.show() but still time picker does not display the title when opening the dialog <a...

Kotlin Multiplatform with iOS: "Use of undeclared type 'KotlinCoroutineContext'" I'm attempting to consume Kotlin multiplatform code (that uses Ktor and Kotlin Coroutines) on iOS. The framework is generated correctly and can invoke some of the classes/methods exposed without any problem. However if I try to add following (as is done in https://github.com/JetBrains/kotlinconf-app/blob/master/konfios/konfswift/ui/UI.swift for example). I get "Use...

What is the Kotlin pendant to Hex.toString(ByteArray)? I have this expression: Hex.toString(byteArray) in my Java code. I would like to use this in my Kotlin code as well, but it does not know Hex?

How to properly request an oauth token on android? I have an android app that needs to connect to a webservice. I'm currently trying to implement the login. I have client_id, client_secret, grant_type, password, scope and username but I need to get an access_token. I have already tried to implement this answer and the solution in this question In my code below I have also tried to switch the requestMethod to "POST" and the commented parts...