How do you test a method that calls another method with Junit5 and mockk? I tried googling but no luck. The SUT has a method that after some logic, calls other method. How can i verify that the method was called without calling it? As I want to keep it a unit test. Can i mock the method somehow?

When creating a LiveData in kotlin is there really any difference between

LiveData<String>

and

LiveData<String?>

? Since all the methods in LiveData are nullable the the types in

observe()

are both nullable and it doesn’t prevent you from setting either value as null. Is it just as a reminder not to set it null?

Is there something like

PublishSubject

for live data? I.E. which emits events without storing them?

Is anyone using trunk-based development at work with success? Coming from a world of GitFlow and it's associated problems, I like the idea of constant issue-granular merges behind feature flags but having trouble finding someone who is using this in practice.

Greetings guys, I'm having a challenge, I have a number 15, and need to get an array of integers out of it, where, the last index in that array should be a 1, first index should be a square of a number, and the numbers in between the first and the last index can either be a square and a 1 or a number and 1 example 15 = {3^2, 2^2, 1, 1}; 8 = {2^2, 2, 1, 1}

What libraries do you guys use for testing modern Kotlin apps? I tried using Junit5 and MockK, while junit5 seems rather okay, the MockK seems horrible, outdated. EDIT: Use 1.9.3 version of MockK and it works fine

Hey guys, is it possible to reference the value passed to a

when

expression using something similar to

it

? In the code below “`it`” gets an error (

Unresolved reference: it

)

when(mCurrentUserType){

UserType.HUMAN -> {
setViewForUserType(currentUser, it)
}

UserType.ANIMAL -> {
setViewForUserType(currentUser, it)
}

}

Hey Guys, is it possible in kotlin to limit the scope of a MutableLiveData<String> to some @StringDef

Hallo. Curious about how many people use any form of kotlin reflection in Android apps? Cant find any resources on how much this is encouraged / discouraged.

Hallo alle. Maybe you can help me with something. I’m currently writing a custom lint rule for my ViewModel classes which checks to make sure no public functions return any type. It’s almost working working except for the fact that my ViewModel’s are

data class

and lint seems to be considering the parameters of the

data class

as a method.

data class ListViewModel(
    private val handle: SavedStateHandle,
    private val repository: ListRepository,
    private val scheduler: IObservableSchedulerRx2,
    private val errorHandler: Mvvm.ErrorHandler
)

So for each method, I am logging the method name and return type, and this is the output when it hits these params

METHOD NAME: component1
FUN RETURN TYPE: PsiType:SavedStateHandle

component2, component3, etc.. for each subsequent parameter. Any suggestions?

What is the general opinion on using kotlinx.serialization on android in terms of size and methods count? Gson just does not do well with kotlin nullability.

Hi, im happy with viewBinding feature, but i got one question, i recently using layouts folder to separate layout files, but viewBinding only recognize original “layout” folder path, is there any way i can make viewbing to recognize the path that i create for layouts?

What is the general opinion of Using coroutines inside ViewModel. As blogged by @Sean McQuillan [G] in his blog https://medium.com/androiddevelopers/coroutines-on-android-part-ii-getting-started-3bff117176dd ViewModelScope automatically cancels any coroutine started inside ViewModel after onCleared is called

private val registerViewModel by viewModels<RegisterViewModel> (userDao)

how can i pass object instance to viewModel using by viewModels extentions , like i want to pass userDao to RegisterVIewModel

Hey guys, for the sake of studying, I am digging inside the code of the abstract class

LiveData

. I wonder, why can’t I call

postValue

or

setValue

If I subclass a LiveData?

private val someInstanceOfLiveData = object : LiveData<String>(){}

fun test(){
    someInstanceOfLiveData.setValue() // Cannot access 'setValue': it is protected/*protected and package*/ in '<no name provided>'
    someInstanceOfLiveData.postValue() // Cannot access 'postValue': it is protected/*protected and package*/ in '<no name provided>'
}

from my understanding,

object : LiveData<String>(){}

is a subclass of the abstract

LiveData

class. If it is a subclass, why can’t I call

postValue()/setValue()

, which are declared as

protected

inside the

LiveData

?

How to deal with

activity

being optional in

onCreateDialog

?

override fun onCreateDialog(savedInstanceState: Bundle?): Dialog =
    DatePickerDialog(activity!!, this, initDate.year, initDate.month, initDate.day)

I'm writing tests for a feature where people can either scan a code or type it in. Either way, the code goes to a backend for validation. I'm writing tests to validate that, for a given code, the screen does the expected thing. Should I write the same tests using both ways, or would just once be sufficient?

Hi guys, in your opinion, what would be the best way to download files on Android in 2020?

Ktor

client,

Retrofit

or

DownloadManager

API? Or maybe something else.

Whirlpool is looking for Android and iOS developers with 3+ years of experience for Pune location. Interested candidates can share their profiles on saiteja_bogade@whirlpool.com

How do you test Android ViewModels that use a viewModelScope to launch a coroutine and post a result to LiveData...? Even with `

@get:Rule
val instantTaskExecutorRule = InstantTaskExecutorRule()

and

shadowOf(Looper.getMainLooper()).idle()

when I try

someLiveData.asFlow().first()

it just stays stuck with runBlocking and crashes with runBlockingTest...

Is there a trick to using View Binding with multiple modules? The bindings aren’t being generated when I add it to a second module.

Hey, might be a dumb question but I can’t seem to figure out what to use, I have a function making a network call that will return an element that you can wait on to retrieve the response and that can be consumed by multiple listeners. For now I have a Flow but this seems overkill for a single return value.

Hi! Can anyone recommend a good permissions library? https://github.com/QuickPermissions/QuickPermissions-Kotlin perhaps?

Hi, I built a small library for Android, it helps you to add custom annotations on retrofit calls and retrieve them later via interceptor Check it out and give me your feedback https://t.co/FF72E0GR1s

I couldn't find anything in the docs, I'm familiar with the concept of back stack https://developer.android.com/guide/components/activities/tasks-and-back-stack (in context of AndroidX navigation) let's say that fragment A is my main one (startDestination) and I go to frag B and then to frag C, meaning the stack looks like this A -> B -> C and then if I navigate from C to A, will it look like A -> B -> C -> A or just

A

? There's no back button on the nav bar when I do so so I assume it's the latter but I just want to make sure that it won't cause any problems in the future

Hey guys, I have a data class

Advertisement

which contains a few enums.

@Parcelize
data class Advertisement(
    @SerializedName("type") val type : AdvertisementType,
    @SerializedName("userTypeTarget") val userTypeTarget : UserTypeTarget,
    @SerializedName("goal") val advertisementGoal : AdvertisementGoal,
    @SerializedName("attachTo") val attachTo : AttachTo,
) : Parcelable

enum class AdvertisementType(private val value : Int) {
    REGULAR(0),
    SOS(1)
}

enum class AttachTo(private val value : Int){
    ME(0),
    MY_OFFICE(1)
}

enum class UserTypeTarget(private val value : Int){
    LAWYER(0),
    SERVICE_PROVIDER(1)
}

enum class AdvertisementGoal(private val value : Int){
    COLLABORATION(0),
    CASE_TRANSFER(1),
    COURT_TRANSFER(2),
    FORM_VALIDATION(3)
}

As you can see, my object properties are enums. However, our backend only accepts Integers. I need to make all the properties into Integers, but I don’t want any future developer to ever create an instance of`Advertisement` directly with some Int, and use the created enums instead. How can I force the insertion of enums yet the actual value of created `Advertisement`to be an Int?

Hi everyOne. Does kotlin support java 5(version 49)?

Hi! View binding: If you have a custom view (class TodayBoxView: RelativeLayout) with inflated layout (R.layout.view_todaybox), where must to do ‘binding = ViewTodayboxBinding.bind(this)’ and where binding = null?