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Hi, guys!! I have got a trouble with our lovely system )) Imagine we have 3 fragments A -> B -> C. I need to go from C -> A using

fragmentManager.popBackStack()

. I did not put the B fragment to back stack, so I used

fragmentTransaction.replace(...).commit()

. BUT! when use

fragmentManager.popBackStack()

on fragment C I go to the fragment A, but fragment C is overdrawn over (or behind I do not understand) fragment A. Do we have a nice solution to manage this situation? I know, that we can use

popBackStack()

for specific transaction, but I do need to put fragment B to backstack

Hi guys! I have a question regarding paging component. My structure is something like this: ViewModel -> Datasource -> Repository. I am passing viewModelScope to Datasource and starting coroutine inside DataSource class, which is then calling Repository where actual api call is being made. Its working fine for me. But i wanna know if there is anything wrong with this implementation structure.

Hello everyone, I'm super new to Android and trying to build a App with the mvvm architecture. From the many tutorials on YouTube I could figure out how to use Observerable and LiveData for data from ViewModel to View but how do I send the events of the View to the ViewModel like button clicks?

https://hastebin.com/axukizulop.bash DaggerApplicationComp is not found, i tried rebuidling and cleaning the project, I tried a lot of stuff online and nothing has worked Nothing is being generated

Hi guys, anyone using Android Studio 4.0 Canary and being able to create a new Vector Asset? For me appears: Nothing to show

I'm trying the new composable functions in AS 4 but where is the preview window? I have no preview window..

Hi guys is there still a need to use Butterknife in Kotlin? Don't we now have an easier way to bind views i.e., https://kotlinlang.org/docs/tutorials/android-plugin.html#view-binding

Hi guys, use databinding it is easier and native.

Hi guys. I have a question here. I have a BaseActivity which has the

showProgressBar(visibility: Boolean)

function, this will toggle the ProgressBar visibility based on the value. Then, I have a RecipeListActivity which extends BaseActivity that will send the boolean data type in the

showProgressBar

when the button is clicked.

BaseActivity .kt

fun showProgressBar(visibility: Boolean) {
    progressBar.visibility = if (visibility) View.INVISIBLE else View.VISIBLE
}

RecipeListActivity.kt

activity_content.test.setOnClickListener(View.OnClickListener { view ->
    val visibility = view.visibility != View.VISIBLE
    showProgressBar(visibility)
})

But right now the value of the visibility in the

showProgressBar

is showing

8

or

0

instead of true or false. Did I miss out anything?

At last

Dagger2

documentation is published officially https://developer.android.com/training/dependency-injection/dagger-basics

Hi everyone! I've stumbled upon this old blog post "Advocating Against Android Fragments" from 2014 which argues that dealing with Fragments is a nightmare and I am better off with custom views for everything. Is this still true in 2019? Did Google do anything to fix this? https://medium.com/square-corner-blog/advocating-against-android-fragments-81fd0b462c97

hey guys, how do you normally handle loading state change, do you create progress bar in view/fragment before executing a network call and hiding it when you get response or do you create a wrapper class like this, setting up LiveData for it in view model and then handling its state change in view

thanks for your answer, your approach seems better than mine, thing that drove me to post this question was that i needed to indicate models type even when creating loading and error states while data was null

Can anyone help me to solve my issue? https://stackoverflow.com/questions/58579715/how-to-pause-play-multiple-mediaplayer-objects-with-one-button

Has anyone found a way to force reinitiation of a viewmodel?

Mockk

Hey Guys, In my current application I am using mockito for mocking, currently I want to switch to mockk, so right now I have a lot of code which look like

verify(loggingService, times(1)).log(any(), any())

is there a way to write wrapper method which will use mockk verify, so I I will not change all 8900 calls in my project ?

Hello. I am using Object{} which has integers which i am passing around and saving those integers in db. Does this approach have any issue? OR should i use IntDef or Enum for this purpose?

Can anyone point me to the source code of the

Lint

android provides by default?

How do you think about jetpack compose. Look good, right ? https://developer.android.com/jetpack/compose

How i can send constructor variables while using

viewModels

ktx extension function ?

To someone more experienced working with Regex patterns. I have a regex pattern that I use to sanitise bad json responses from our backend, replacing empty objects (

{}

) with null, and empty lists (

[]

) with null. The pattern is as follows:

Regex("""\{}|\[]""")

This compiles and works just fine in a unit test, but on android it crashes with:

Caused by: java.util.regex.PatternSyntaxException: Syntax error in regexp pattern near index 3
    \{}|\[]
       ^
        at java.util.regex.Pattern.compileImpl(Native Method)
        at java.util.regex.Pattern.compile(Pattern.java:1344)
        at java.util.regex.Pattern.<init>(Pattern.java:1328)
        at java.util.regex.Pattern.compile(Pattern.java:950)
        at kotlin.text.Regex.<init>(Regex.kt:89)

All I can surmise from this is that the underlying native implementation on Android is different.

is anybody else having issues with ButterKnife?

thanks in advance https://kotlinlang.slack.com/archives/C0B8Y8BHC/p1572465499006700

It was mentioned, I believe multiple times , including in the what is new in AS

I don't think that anyone promoted it as a better version of databinding more as a lite version

They didn't tell more at this one it seemed but maybe you will find something additional. I think you got it. I am not a googler but I talked to Yigit about it at the last IO and he told me that they don't want people to face issues that finidViewById entails but at the same time not everyone wants to go all the way databinding cause it could be an overhead and it seems too complex. And when they looked at how people use databinding they realized that many don't use expressions or custom adapters but just access views and that's how they decided to give people view binding as a type safe and not that complex way to serve that purpose. And also eliminate the need for 3 party libraries like ButterKnife.

Hello Guys, I am having hard time figuring out how I can connect my

Repository

and `ViewModel`'s livedata in-case of

@GET

request and observe them in fragment. I don't have this problem when the request type is

@POST

because I can use

Transformation.switchMap

on body and whenever the body changes repository's function gets invoked and emit value to the response live data something like this

val matchSetsDetail: LiveData<Resource<MatchDetailBean>> = Transformations.switchMap(matchIdLiveData) { matchId ->
        val body = MatchSetRequest(matchId)
        repository.getMatchSet(body)
    }

but in case of

@GET

request I have several query parameter the my View supplies I have this retrofit API call in repository class and the code looks like this

fun checkInCheckOutUser(apiKey: String, userId: Int, status: String, latitude: Double, longitude: Double, checkedOn: Long): LiveData<Resource<BaseResponse>> = liveData {
        emit(Resource.Loading())
        try {
            val response: Response<BaseResponse> = ApiClient.coachApi.checkInCheckOutUser(apiKey, userId, status, latitude, longitude, checkedOn)
            if (response.isSuccessful && response.body() != null) {
                if (response.body()!!.isValidKey && response.body()!!.success) {
                    emit(Resource.Success(response.body()!!))
                } else {
                    emit(Resource.Failure(response.body()!!.message))
                }
            } else {
                emit(Resource.Failure())
            }
        } catch (e: Exception) {
            emit(Resource.Failure())
        }
    }

and

ViewModel

class CheckInMapViewModel : ViewModel() {
    val checkInResponse: LiveData<Resource<BaseResponse>> = MutableLiveData()

    fun checkInCheckOut(apiKey: String, userId: Int, status: String, latitude: Double, longitude: Double, checkedOn: Long): LiveData<Resource<BaseResponse>>  {
        return repository.checkInCheckOutUser(apiKey,userId,status,latitude,longitude,checkedOn)
    }
}

Main problem is I want to observe

checkInResponse

but don't know how to pass repository's livedata same as I did with my post request above using

Transformations.switchMap

. Can anyone help me with this case?