Why httpGet() causes a com.github.kittinunf.fuel.core.BubbleFuelError: null? I have a rest call realized by fuel library in my Android app Kotlin project. While attempting to call httpGet I get this: Caused by: com.github.kittinunf.fuel.core.BubbleFuelError: null com.github.kittinunf.fuel.core.FuelError$Companion.wrap(FuelError.kt:84) 03-06 113239.112 6328-6328/com.example.demo I/System.out: com.github.kittinunf.fuel.core.requests.RequestTask.executeRequest(RequestTask.kt:24)...

Google adMob InterstitialExample not showing add i got a google Interstitial Example for adMob from https://github.com/googleads/googleads-mobile-android-examples/tree/master/kotlin/admob/InterstitialExample just for test run on my device. But it's not working at all. I'm testing it on the real device and i put real device id in builder.addtestdevice, but it's still showing "Ad wasn't loaded."...

From Kotlin call Java method requiring Function parameter I am having problems converting this chunk of Java to Kotlin: Publishers.map(chain.proceed(request), response -> { if (request.getCookies().contains("SOME_VALUE")) { response.cookie(request.getCookies().get(STATE_COOKIENAME).maxAge(0)); } return response; }); The second parameter of the map method (note Publishers is not a collection) takes Function. I have tried several solutions, including providing a lambda thus:...

No Koin on path in Android I'm following this guide to build an app with DI using Koin: https://insert-koin.io/docs/1.0/documentation/reference/index.html#_starting_koin_with_android_context_from_elsewhere Yet I get this error E/AndroidRuntime: FATAL EXCEPTION: main Process: com.myapp.kotlinbasics, PID: 13925 java.lang.NoClassDefFoundError:...

Kotlin generic Collection cast I a very new to Kotlin and working on a simple method that sorts and joins a list to string private fun generateKey(params: Array): String { val genericCollection = if (params.isNotEmpty() && params[0] is Collection) params[0] as Collection else throw Exception("no params provided for keyGenerator") return genericCollection.sortedBy { it }.joinToString(separator = "_") } but I got this compilation error: Type parameter bound for R in inline fun >...

Access methods as subclass [duplicate] This question already has an answer here: Modifier `protected` is not applicable inside `file` error in Kotlin 1 answer <a href="https://stackoverflow.com/questions/35914095/package-protected-alternative-in-kotlin" dir="ltr">package protected alternative in...

Is there a way to declare a java method as infix for kotlin Is there a way to declare a method from a java class so that it is callable as an infix function from kotlin, like this : public class Foo { public void doFoo (String bar) {} } Then from a kotlin file foo doFoo "bar"

Firestore client hangs when attempting to read data running on App Engine Standard with Ktor/Java8 I'm having issues integrating with Firestore in the Google App Engine Standard environment (using Java8, Kotlin and Ktor). The Firestore client hangs when I attempt to perform any operation. It works fine when running in the dev appserver but doesn't when running in production. I'm running: Ktor 1.1.2 Kotlin 1.3.21 com.google.cloud:google-cloud-firestore (version 0.81.0-beta) Firestore in native mode I've tested with this simple route: get("/test") { val firestore =...

String.toByteArray for Kotlin JS Using kotlin is there standard library method to to convert a String to either an Array or ByteArray val myStr: String = "Some String" val myStrBytes = myStr.toByteArray(Charsets.UTF_16).toTypedArray() The code above works when targeting the JVM but fails with the error below when targeting JavaScript: Unresolved reference. None of the following candidates is applicable because of receiver type mismatch: [ERROR] public fun Array.toByteArray(): ByteArray defined in kotlin.collections...

Spring Integration Connecting a Gateway to a Service Activator I've created a Gateway and a polling notificationChannel which the Gateway uses to route messages. I want a service activator to poll from the channel and do its thing. But I can't seem to grasp a few things about Spring Integration. In this case would we need an IntegrationFlow Bean? Wouldn't calling the gateway method just send the message trough the channel and the service activator can just poll automatically when there is a new message? ConfigurationClass: @EnableIntegration...

Mockito spy throws stubbing exception I'm trying to spy restTemplate and I wanna to stub 'exchange' method Here is some code: spying class @Bean fun mockedRestTemplate(): RestTemplate = Mockito.spy(RestTemplate::class.java) another class val headers = HttpHeaders() headers.setBasicAuth(UUID.randomUUID().toString(), UUID.randomUUID().toString()) val responseBody = "some error message" val ex = HttpClientErrorException.create( HttpStatus.NOT_FOUND, "random", headers,...

How is memory leak happening in this scenario? I am not able to understand how memory leak is happening in my application. I have a simple code that reproduces the error as follows: In the MainActivity. I create a calendar instance and update milliseconds in a TextView private lateinit var calendar: Calendar override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) // Example of a call to a native method sample_text.text = stringFromJNI()...

How to create instance for generic type in Kotlin? class Result { var result: T = getValue() // erorr compile inline fun getValue() : T = getValue(T::class) fun getValue(clazz: KClass) : T { clazz.constructors.forEach { con -> if (con.parameters.isEmpty()) { return con.call() } } throw SomeException() } Error compilation: Cannot use as reified type parameter. Use a class instead. How to create instance for generic type in Kotlin?

BottomSheet not shown when use RecycleView I have the following code for bottom sheet xml file View class AttributeOptionsBottomSheet(val viewModel: AttributeOptionsViewModel) : BottomSheetDialogFragment() { override fun getTheme(): Int = R.style.AppBottomSheetDialogTheme override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View? = inflater.inflate(R.layout.bottom_sheet_attributes, container, false) .also { view...

Android- How to extend AppCompatActivity() in an Adapter? I got an adapter and I got an action which open a "app camera", then I capture the image. And from here it got to execute a function called onActivityResult(requestCode: Int, resultCode: Int, data: Intent?), but I can't override the method because I can't extend AppCompatActivity(). Any help?

Abstract class implemented by 2 activity work improperly Home activity GeneralPlayer activity I make 2 activity with extends abstract class which contain an abstract method. abstract method has a different implementation in all 2 class. when app starts it will go home activity and call its method which declared abstract in abstract class. it's fine. when I will go to second(GeneralPlayer) activity. then its abstract method call .which is also fine but when I came to home activity than here GeneralPlayer activity abstract method call which is...

How to get past the `memory leak` warning i.e. creating a sigleton class that extends the AsyncTask class I have created a UDP communication application and it is working very well (so far). I do the UDP packet receiving using a class that extends AsyncTask. For the sake of clarity (and brevity) I have divided the code into separate kotlin files. Earlier, I had inner class for the UDP receiver class but that make the code very lengthy and unreadable. MainActivity.kt handles the UI stuff like button press and creating objects LongTask.kt defines a LongTask class that extends the AsyncTask (UDP...

A problem with the emulator in Android Studio. Small screen and the app won't run I'm having an issue with my emulator. It won't run my app. The app is working fine on an actual phone. I've already looked at some others and tried a few things but it just isn't working. What's with the minus points instead of answering the...

Convert binary String to hexadecimal String I have this conversion in my Kotlin class for Android: val binary = "01000100000111001011011011100010111000110011010111010110" val hexadecimal = BigInteger(binary, 2).toString(16) Which is producing the expected value of 441CB6E2E335D6. Now I want to reproduce this in Visual Basic and I am doing something like this: Dim binary = "01000100000111001011011011100010111000110011010111010110" Dim hexadecimal = BigInteger.Parse(binary, 2).ToString("X") Which is producing...

Feign jackson dateTime JsonMappingException I've got two services that are communicating with openfeign (github.openfeign:10.2.0). I'm forcing problem with deserializing datatime that is sent as JSON. Here is my configuration: @Configuration class JacksonConfig : WebMvcConfigurerAdapter() { override fun extendMessageConverters(converters: List?) { for (converter in converters!!) { if (converter is MappingJackson2HttpMessageConverter) { val objectMapper = converter.objectMapper...

Invalid refrence in spring mongo aggregation stage This is my aggregation stage. Here I am getting invalid refrence user. which is correct.Because after group stage we have only _id field. var eventGroupOperation = Aggregation.group(Fields.fields("userId")) var projectOperation = Aggregation.project("user") But here I am confused. var eventGroupOperation = Aggregation.group(Fields.fields("userId")) var projectOperation = Aggregation.project("userId") There is no error and my aggregation is { "aggregate" :...

How to detect soft keyboard visible/invisible in Android from System Overlay View? I am wondering if it is possible to detect if the keyboard is visible or hidden from my view that is System Overlay View. I need to push the view on top of the keyboard when it becomes visible. And at the current moment if the view is on the bottom of the screen - it still remains there when the keyboard is visible. I think that this is not possible, but may be.....

How to simplify this kotlin code（kotlin）? How to simplify this kotlin code（kotlin）?

Composite Id as only fields of entity Hi I'm looking for the way to simplify entity made only from two id's. This is wha I've done and its working but looks little bit ugly. I hope there is a way to remove CompositeId as another class. @Entity @IdClass(CompositeId::class) data class OnlyPrimaryKeyClass( @Id val id1: Int, @Id val id2: Int ) data class CompositeId( val employeeId: Int, val organizationId: Int ) : Serializable

Enumerated annotation type in Kotlin In java I can define enumerated annotation type like this (from here) // Constants public static final String WINTER = "Winter"; public static final String SPRING = "Spring"; public static final String SUMMER = "Summer"; public static final String FALL = "Fall"; // Declare the @ StringDef for these constants: @StringDef({WINTER, SPRING, SUMMER, FALL})...

Integrate startapp ads using Kotlin in android [on hold] I want integrate Startapp ads in android application and app code is in Kotlin. I didn't find ads integration code in kotlin. please help. Thank you.

Android/Kotlin: I try to create a simple Singleton, but when I want to use it, it doesn't import the class in the class I want to use I would like to create a singleton to access some functions, but when I import it, It doesn't find the class to import: Class with singleton: DBHandler.kt package com.xxxxx.GMP_app_android.DBManagement import android.database.sqlite.SQLiteDatabase import android.database.sqlite.SQLiteOpenHelper import android.content.Context import android.content.ContentValues import...

extension function for Kotlin data class I have a data class which looks something like this data class SuggestionResponse( val metadata: Metadata, val response: Response ) data class Response( ///blah blah ) data class Metadata( val timeleft: String, val totalTime: String ) Now my requirement to transform this data into a different type of data object .I want to write an extension function to do this task.let the name of function be hello I would like to call this extension function like this...

Why is CoroutineScope.launch and Coroutine.async are extension functions instead of a member function of CoroutineScope? The title states my question. What is exactly the reason why CoroutineScope.launch and Coroutine.async are just extension functions of CoroutineScope instead oa a member function? What benefits does it provide? I am asking because maybe the reason behind this design could be helpful in designing things in the future too. Thank in advance.

kotlin; group by multiple fields How can I do a groupBy in my code by three or more fields? My code is like below: val nozzleSaleReport = nozzleStateList.groupBy { {it.shift.id},{it.createUser.id},{it.nozzle.id} // Here I need to add these three fields for grouping operation }.map { entry -> val max: Float = (entry.value.maxBy { it.nozzleState.finalLitreMechanical }?.nozzleState!!.finalLitreMechanical ?: 0).toString().toFloat() val min: Float = (entry.value.minBy {...