Not sure if in good channel, but we have a client that uses an android library (.jar) generated from kotlin multiplatform from React Native code. (They also use an iOS library generated from the same kotlin multiplatform code.) Now the iOS code still works fine, but on the Android side, they now have a java.lang.NoSuchMethodError as the static (extension) method UByteArray.get-impl isn't found anymore. I couldn't reproduce on my side from a Java client. Here are some info: java.lang.NoSuchMethodError: No static method get-impl([BI)B in class Lkotlin/UByteArray; or its super classes (declaration of 'kotlin.UByteArray' appears in /data/app/com.monbuilding.app-GLyhWQ0PinE67M1jnUSHPw==/base.apk:classes29.dex) Build Information: buildToolsVersion = "30.0.2" minSdkVersion = 26 compileSdkVersion = 30 targetSdkVersion = 30 RNNKotlinVersion = "1.5.30" // Or any version above 1.3.x RNNKotlinStdlib = "kotlin-stdlib-jdk8"

Is it necessary to escape the dollar sign in a string?

"**/R\$*.class"

Hey guys, I am updating kotlin from 1.6.10 to 1.7.10 in my project and now when I try to sync gradle it fails with:

A problem occurred configuring project ':android'.
> Failed to notify project evaluation listener.
   > Could not create task ':android:compileDebugAndroidTestKotlin'.
      > Cannot invoke "String.trim()" because "in" is null
   > KotlinJvmAndroidCompilation with name 'debugAndroidTest' not found.

If I try the same with kotlin 1.6.10 it works fine. Any ideas?

Any major idea why one would use the Android Instrumentation class for within an app, is this a good practice ?

Hey there, in an Android project with 100% Kotlin code, what benefits are there to target JVM 11 instead of 1.8?

android {
    compileSdkVersion 33

    compileOptions {
      sourceCompatibility JavaVersion.VERSION_11
      targetCompatibility JavaVersion.VERSION_11
    }

    kotlinOptions {
      jvmTarget = "11"
    }
}

I assume the Android Gradle plugin will desugar the bytecode to be compatible with Java 1.8 (or 1.6?) so what are the benefits of letting the Gradle plugin do this instead of using 1.8 as JVM target?

Hi, I'm working on an app to display weather using openWeather API, retrofit and moshi. The last thing I need to do. It is to display weather information for each day. For this I need to create an adapter for listview. So I had an idea inside the onResponse method. Add individual elements to the array. But that doesn't work. Could someone advise me how to do this?

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)



        val _status = MutableLiveData<String?>()

        val status: LiveData<String?> = _status
        val api : String = "33aa634c216259f797f35e862f0*****"

        val spinner = findViewById<Spinner>(R.id.cities)
        //val result = findViewById<TextView>(R.id.result)
        val cities = arrayOf("New York", "Sydney")
        val cnt = findViewById<EditText>(R.id.NumberOfDays)
        val button = findViewById<Button>(R.id.button)

        val arrayAdapter: ArrayAdapter<*>
        val data = arrayListOf<String>();
        var listView = findViewById<ListView>(R.id.list)
        arrayAdapter = ArrayAdapter(this, android.R.layout.simple_list_item_1, data)
        listView.adapter = arrayAdapter


        spinner.adapter = ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, cities)


        button.setOnClickListener {
            val selected = spinner.selectedItem as String

            var lat: String = ""
            var lon: String = ""
            if (selected == "New York") {
                lat = "40.79052384606425"
                lon = "-73.95908688800822"
            } else if (selected == "Sydney") {
                lat = "-33.8470241774331"
                lon = "151.0624326592654"
            }

            if(!TextUtils.isEmpty(cnt.text.toString())){
                lifecycleScope.launch{
                    WeatherApi.retrofitService.getWeatherData(lat, lon, api, "metric", cnt.text.toString()).enqueue(object: Callback<WeatherInfo> {
                        override fun onResponse(call: Call<WeatherInfo>, response: Response<WeatherInfo>) {
                            data.add(response.body()?.city?.name.toString())
                            //result.text = response.body().toString()
                            Log.d("Full response: ", response.body().toString())
                        }

                        override fun onFailure(call: Call<WeatherInfo>, t: Throwable) {
                            Log.d("Failure: ", t.message.toString())
                        }

                    })
                }
            }
        }

    }
}

Hey guys good morning. i am trying to publish a KMM library to maven central i hape followed this article https://dev.to/kotlin/how-to-build-and-publish-a-kotlin-multiplatform-library-going-public-4a8k but the publishment is always failing i am getting the error in the screenshot attached below.

Note: I have two adapters in this app. It will recognize the interface functions I have in the other one. But not this one

Any idea why my adapter won't recognize the function here? Excuse the messy code. This is just driving me nuts.

Having a problem calling setDefaultDisplayHomeAsUpEnabled. The tutorial I am doing actually says I should use

supportActionBar?.setDefaultDisplayHomeAsUpEnabled(enableHome)

but this gives more errors, the version I am trying with true gives `ActionBar.setDefaultDisplayHomeAsUpEnabled can only be called from within the same library group prefix (referenced groupId=

androidx.appcompat

with prefix androidx from groupId=

Flicker Browser

)` Any ideas?

package com.funkytwig.flickerbrowser

import android.util.Log
import android.view.View
import androidx.appcompat.app.AppCompatActivity
import androidx.appcompat.widget.Toolbar

private const val TAG = "BaseActivity"

// internal as don't have to be available outside this project ?? check ??
internal const val FLICKER_QUERY = "FLICKER_QUERY"
internal const val PHOTO_TRANSFUR = "PHOTO_TRANSFUR"

open class BaseActivity : AppCompatActivity() {
    internal fun activateToolbar( home:Boolean) {
        Log.d(TAG, "activateToolbar")

        var toolbar = findViewById<View>(R.id.toolbar) as Toolbar
        setSupportActionBar(toolbar)
        supportActionBar?.setDefaultDisplayHomeAsUpEnabled(true) // does not work

    }
}

Hi All, Can anyone direct me how to achieve the same thing . on Android recycler view with pagination ??

Hey people, do you know how to find a distance between 2 points along the curve in circle in Canvas?

Hi Guys, can anyone help debug uiJank using profiler and jetpack compose ?

Hi I am trying to add OptIn in my compiler gradle.

tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).all {
    kotlinOptions {
        freeCompilerArgs += [
            "-Xuse-experimental=com.google.accompanist.permissions.ExperimentalPermissionsApi"
        ]
    }
}

I tried this piece of code but it giving me error. Can anyone guide me what I am doing wrong here

Is there a site for Jetpack Compose API references, like what classes need what imports to import?

Like something I can search without dragging out everything with the word surface attached to it.

Hey guys, i'm tryin to make a MAD scorecard but the page madscorecard.withgoogle.com is not working. Do you have any idea why is it down and if it will work again soon?

You all are working in Jetpack compose

What you think, compose is good or not?

Hey guys, need some help, I have the following scenario: I have an object that gets populated through multiple screens (I use Compose), what is the right way to do this? • A - Have a ViewModel scoped to the Activity/Fragment and mutate the object in each screen? • B - Pass the object down to each Composable and mutate it in each VM (scoped to the Composable) ? • C - What would be the right way?

I am trying to add some simple JSON deserialization to our app; I'm trying to follow the instructions here: https://kotlinlang.org/docs/serialization.html. What's befuddling me is where I'm supposed to put these two build.gradle lines:

plugins {
    id 'org.jetbrains.kotlin.jvm' version '1.7.10'
    id 'org.jetbrains.kotlin.plugin.serialization' version '1.7.10'
}

There's two build.gradle files. Which one? I've tried placing it in both of them at various locations, and I always get errors about it needing to above or before one thing or another. Is the snippet/instructions up to date?

I have multiple

Long

Int

and

Byte

variables which I use across my codebase but have to convert them to different types. Lets take a

Long

variable which I have to convert to int (

toInt()

) or byte (toByte()) at different places. Is it common to provide the same variable as

Int

or as Byte, e.g.

myVariableAsLong

,

myVariableAsInt

,

myVariableAsByte

? Does this approach make sense, is there another common approach for this case or is it pointless?

hello everyone i am facing following issue after updating my android studio to dolphin. someone help me on this https://stackoverflow.com/questions/73772547/android-studio-dolphin-2021-3-1-does-not-show-layout-preview

is there any recommended approach for integrating google cast whilst using jetpack compose? Getting a cast icon that manages itself in a compose world seems to be a massive pain (I think due to activity lifecycle and initial composition, but I have no idea)

data

is a Request

sealed class

and inside that class there 3 classes

Opened, Success, NotSigned

How I can cast

data

to have access to

data.openedFrom

value? I want to avoid invoking 3 times

navigate()

function

What’s the difference between

"org.jetbrains.kotlin.android

and

"org.jetbrains.kotlin.jvm

gradle plugins ?

Hi ✌️

Hey there, i have already asked this in the #flow its been 3 days without answer, so i'm posting it here I"m not able to use coroutine Context, in the flowOn(....), app is crashing with

java.lang.IllegalArgumentException: Flow context cannot contain job in it. Had [SupervisorJobImpl{Active}@7b4ca1f, <http://Dispatchers.IO|Dispatchers.IO>]

interface UseCaseScope : CoroutineScope {
    override val coroutineContext: CoroutineContext
        get() = SupervisorJob() + <http://Dispatchers.IO|Dispatchers.IO>
}

FlowUsecase : UseCaseScope {
 <snip>
}

The intention here is to cancel the coroutine context when we business logic need to cancel it. So that i can call coroutineContext.cancel()

class LoginUseCase(private val authRepository: AuthRepository) : FlowUseCase<LoginRequest, Boolean>() {

    override fun execute(parameter: LoginRequest): Flow<Result<Boolean>> =
        flow {
            authRepository.login(parameter.username, parameter.password).collect { response ->
                this.defaultResultHandler(onSuccess = {
                    emit(Result.success(true))
                }, response)
            }
        }.flowOn(coroutineContext)

    override fun cancel() {
        coroutineContext.cancel()
    }
}

^^^ will cause app the crash

Hi, Can i use .aar with the help of Kotlin DSL? I am attaching project structure snap. I am using below code to access it but getting error.

implementation("$rootDir/UI-Modules/carousel-release.aar"

Is there a setup guide for using Intellij with Capacitor/Typescript projects? The project loads and Intellij recognizes that there is an android component, but there are settings I’m not sure about. The docs discuss setting up Typescript projects, but don’t seem to address Capacitor/Typescript specific apps.