if you don't want problems, run AS stable (3.3.2)

So I noticed that a lot of developers will use $module in there gradle so they don’t have to update the number in multiple places. However since android studio has this really nice feature where it lets you know when there is a new version of something (but this breaks when you use the $module approach. Just wondering is there a reason people dont just put the number and allow android studio to tell them there is an update, is it normally bad to update the gradle dependencies on an app, I would have thought it would always be best to be on the latest version of each dependency? thoughts?

If anyone that really knows JUnit 5, Room, Unit Testing and Testing the Dao please let me know(i could really use some guidance 30 mins or so) 🙂 I had it all working in JUnit 4 but because 5 doesnt use Rules I cant get my test to work right now.

Anyone used the Fuel library? This one https://github.com/kittinunf/fuel.

I’ve checked all of the superclasses and dependencies, and didn’t find any abstract property of that name. There is, however, a

val body: String?

property on the

FuelRouting

interface

Hey everyone should it be

android {
    defaultConfig {
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
}

or

android {
    defaultConfig {
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner4"
    }
}

or

android {
    defaultConfig {
        testInstrumentationRunner "androidx.test.ext.junit.runners.AndroidJUnit"
    }
}

???

Ok I feel like I am doing something wrong. I have this “All In App” thing that I can run https://imgur.com/a/E4hnH47 which runs all my unit tests both in test and android Test however if any of them fail (which some do) I run them on there own sometimes they pass and sometimes they dont. if they dont and I change something I have to run them individually then I can run the All In App to see the changes??? Also why do they sometimes work and sometimes not?

Hi, I'm trying to setup a channel producer like explained here (https://kotlinlang.org/docs/reference/coroutines/channels.html) - keyword: coroutines - but I don't know how I have to use a scope so that the

produce

method is available within `scan`:

@ObsoleteCoroutinesApi
    @ExperimentalCoroutinesApi
    @RequiresPermission(Manifest.permission.BLUETOOTH_ADMIN)
    fun scan(filters: List<ScanFilter>?, settings: ScanSettings): ReceiveChannel<ScanResult> {
        requireSafeSettings(settings)
        return produce(context) { // unresolvable reference
            val scanResultsChannel = Channel<ScanResult>(capacity = UNLIMITED)
            val scanCallback = ScanCallback(scanResultsChannel)
            scanner.startScan(filters, settings, scanCallback)
            scanResultsChannel.consumeEach { send(it) }
            scanResultsChannel.invokeOnClose { scanner.stopScan(scanCallback) }

            if (SDK_INT >= O_MR1 && scanCallback.isScanningTooFrequently()) {
                scanResultsChannel.close(ScanFailedException(SCAN_FAILED_SCANNING_TOO_FREQUENTLY))
            }
        }
    }

I call this method within

ScannerLiveData

class that extends from LiveData:

fun startScan() {
        if (isScanning) {
            return
        }

        scanChannel = scanner.scan(null, settings)

        scanChannel.consumeEach {  // unresolvable reference
            // Todo
        }

        isScanning = true
    }

My

ScannerLiveData

object gets injected in my

ScannerViewModel

where I simply call

startScan()

. I don't know how to provide a scope to use the

scan

method. I know there is a predefined

viewModelScope

...The only idea I have is to pass this scope down to

scan

method. Can someone help?

However, KotlinTest has Android in the near-future roadmap

ok nice. I have a component that should die with my fragment. Should I instantiate this component in application as singleton and provide it in my fragment or should I instantiate it in fragment everytime it is started? @jw oh the question isn't Kotlin specific at all ^^ but I would appreciate some help

Hey all. Anyone have any insight as to why

R

is giving me an unresolved reference error? edit: The solution was to downgrade the Android Gradle Plugin to 3.2.1 from 3.3.0 in Intellij, as there were some breaking changes that were not brought over.

I'm about using

ButterKnife

for view binding, i wanted to confirm if there is another(better) alternative provided by google itself?

hey, this code is throwing NPE, any ideas why?

fun ConnectivityManager?.isConnected(): Boolean {
    return this != null && activeNetworkInfo != null && activeNetworkInfo.isConnected
}

Fatal Exception: java.lang.IllegalStateException: activeNetworkInfo must not be null

Does anyone know when the Android Gradle plugin will let me upgrade to Gradle 5.3.1? Keep getting this error when I try to sync after upgrading

Gradle sync failed: Unsupported method: IdeaModuleDependency.getDependencyModule()

. Am I doing something wrong here? It seems like other people are using Gradle v5.0+ .. 🤔

set

archivesBaseName

in each module to something unique

Trying to understand few things... Was trying to create an extension:

fun View.setOnClickListenerWithThrottle(@Nullable listener: View.OnClickListener?) {
        // body
    }

Was planning to use like the Android `setOnClickListener`:

// This is the Android 'public void setOnClickListener(@Nullable OnClickListener l)'
        view.setOnClickListener {
            //onClick action
        }

But I'm getting this error:

/*
            Type mismatch.
            Required: View.OnClickListener?
            Found () -> Unit
        */
        view.setOnClickListenerWithThrottle {
            //onClick action
        }

Any idea or suggestion? Someone knows why or how I could achieve the desired behaviour?

Hi, anyone have issues when using databinding, and viewmodel's with mutable live data objects and fragments? e.g. on device rotate, I get

onCreateView

called twice, and 2nd time, my mutable live data is blank/fresh

Hi any one written unit tests for coroutines with launch and async

Perhaps I’m mistaken or uninformed, but it does look like there are times when the Kotlin property syntax is misleading: e.g. I’m writing some code to cancel jobs via JobScheduler, and so in Kotlin I have the following code:

val jobScheduler = context.getSystemService(Context.JOB_SCHEDULER_SERVICE) as android.app.job.JobScheduler
jobScheduler.allPendingJobs

where

jobScheduler.allPendingJobs

is property syntax for the abstract method

JobScheduler#getAllPendingJobs

Initially I figured I’m just accessing a member variable of the

JobScheduler

(apparently abstract) class but when I dive into

JobScheduler

, I noticed that

allPendingJobs

is actually an abstract method, which, for all I know, is doing some intensive work and has not already done that work I guess what I’m asking is, why does Kotlin and/or the IDE use property syntax on abstract methods? or am I misunderstanding what “property syntax” means? or…? Thanks for your time!

This message was deleted.

Does this make sense? The assetRepoImpl checks the database first and assigns the currentUser then checks the server (When appropriate) and updates the currentUser on the observer. I need access to the currentUser inside the AssetRepo to get the Assets. So I am looking to see if this is the best way / right way?

class AssetRepositoryImpl(private val assetDao: AssetDao,
                          private val assetAPIDataSource: AssetAPIDataSource,
                          userAPIDataSource: UserAPIDataSource,
                          userDao: UserDao
) : AssetRepository {

    private lateinit var currentUser: User

    init {
        //Check the database first
        userDao.getCurrentUserLiveData().observeOnce {
            println("ObserverOnce In AssetRepo Impl ${it.token}")
            currentUser = it
        }

        //When there is an update then update here
        userAPIDataSource.downloadedCurrentUser.observeForever {
            currentUser = createUser(it)
        }

        assetAPIDataSource.downloadedCurrentAssets.observeForever { newCurrentAssets ->
            persistFetchedCurrentAssets(newCurrentAssets)
        }
    }

I should note that it works. 🙂 but just because something works doesn’t mean its right and yes I am aware that there is lots missing for proper understanding. hopefully most will be able to understand what I am trying to do. In essence I need a way to access the user inside the asset repo.

Does this seem like a good use of extension functions? Yay or nay? Any suggestions? https://twitter.com/pablisc0/status/1113129390572032000

i've always found those extensions incredibly helpful https://github.com/exozet/AndroidCore/blob/master/core/src/main/java/com/exozet/android/core/extensions/Resource%2BExtensions.kt#L49-L126

Do I really have to have a

ViewModel

in order to extend a

PagedListEpoxyController

? like so: https://github.com/airbnb/epoxy/blob/master/epoxy-pagingsample/src/main/java/com/airbnb/epoxy/pagingsample/PagingSampleActivity.kt

My Kotlin multiplatform module looks like this in Android Studio: there are 4 modules (could be ok), but I cannot see the sources from commonMain. Any tricks how to beat it (except switching to IDEA 😉?)

Is getting references to views in an Activity like this considered a bad practice ?

val button : Button by lazy {
    findViewById(R.id.button)
}

Hi, can someone recommend me a library that can execute Javascript code in android outside webview?

Hi, I’m still a bit confused about CoroutineScopes and CoroutineContext. I have a component which launches two coroutines 1. Coroutine which should run even if the user leaves the screen (parses a response from the server and stores the data into the db) 2. Coroutine which is tied to the UI and should be canceled as soon as Android’s ViewModel onClear method is called. I have a couple of questions a) What should I pass to the component - scope or context? b) If I create a context in the ViewModel with

backgroundDispatcher + job

and pass it into the component and I run GlobalScope.launch(context). Will

job.cancel()

cancel it?

Hello guys am designing an app that uses buttons to call different people. but am failing on setting onclicklistener for all the buttons to work. i can set the onclicklistener for only on button but for many i dont know how to do it. am new in kotlin android

Hello, I'm trying to debug my app and I have a problem: I keep stepping into the Kotlin collections file although I don't want to. The option "do not step into kotlin runtime library" is checked in the "stepping" section of the settings. I also added "kotlin.*" into the classes to exclude from stepping. Nevertheless, when I "step over" I keep getting into _Collections.kt How can I avoid that? Thanks,