So i'm having this weird issue - I'm manually building a data model for my app layer and then using KotlinPoet to generate a Room compliant version of the same model that I'm using as a Room entity. When I clean and build, Room can't find the generated model. The only path where Room can find the generated model is if I clean -> build -> change the order of my gradle dependencies -> re-sync -> build. In the last build, Room will find the generated models. Anyone have any idea why?

I have a custom view that animates when clicked for which I’m trying to improve performance. When I enable Show GPU view updates in developer settings I notice that while this view is animating the entire screen flashes the whole time it is animating. There is also an animated vector drawable inside the same FrameLayout as this custom view and while the AVD is animating the entire screen flashes as well. Is this a good indicator of where the performance issues may come from? If so how could I solve this? Alternatively I have the same custom view in another layout which has no performance issues and I notice that while this view is animating, at first the whole screen flashes however for the last half of the animation only the custom view flashes. Thanks!

I've taken LiveData and databinding Observables for granted. Someone asked why I don't unsubscribe from Observing either, and I realized that I don't know. Tried finding an answer, but haven't found one. In our project, Observables and LiveData are used for databinding and observed from Fragments/Activities. Would love to know if I have implemented them wrong, or learn why unsubscribing isn't necessary.

I see that I'm getting camelCase naming from the array response in getJobs, so I'm thinking now that the parsing is simply case sensitive?

Am I the only soul on earth that finds the whole LiveData encapsulation atrocious to the eyes? I obviously understand why we only let 'LiveData' vars accessible and not mutable ones, but it honestly kills me inside to have repeated fields where one has prefixed '_', e.g.:

private val _navigateToSpeakerAction = MutableLiveData<Event<SpeakerId>>()
val navigateToSpeakerAction: LiveData<Event<SpeakerId>> = _navigateToSpeakerAction

it's so goddamn ugly.. i think i even prefer just a standalone getter

Is OkBuck ready for use with Kotlin (coroutines, channels,...) and Android? Or is Gradle still preferred?

I am facing one issue using dagger2 + Kotlin This is my ModuleClass

object AppModule {

    @JvmStatic
    @Provides
    fun provideRequestOptions() = RequestOptions.placeholderOf(R.drawable.white_background)
            .error(R.drawable.white_background)

    @JvmStatic
    @Provides
    fun provideGlideInstance(application: Application, requestOptions: RequestOptions) =
            Glide.with(application).setDefaultRequestOptions(requestOptions)

    @JvmStatic
    @Provides
    fun provideAppDrawable(application: Application) =
            ContextCompat.getDrawable(application, R.drawable.logo)
}

In my Activity I am using 2 injects

@Inject
    lateinit var drawableLogo: Drawable

    @Inject
    lateinit var requestManager: RequestManager

    fun setLogo() = requestManager.load(drawableLogo).into(loginLogo)

I am getting below error:-

/app/build/tmp/kapt3/stubs/debug/com/example/di/AppComponent.java:7: error: [Dagger/Nullable] android.graphics.drawable.Drawable is not nullable, but is being provided by @org.jetbrains.annotations.Nullable @Provides android.graphics.drawable.Drawable com.example.di.AppModule.provideAppDrawable(android.app.Application)
public abstract interface AppComponent extends dagger.android.AndroidInjector<com.example.BaseApplication> {
                ^
      android.graphics.drawable.Drawable is injected at
          com.example.AuthActivity.drawableLogo
      com.example.AuthActivity is injected at
          dagger.android.AndroidInjector.inject(T) [com.example.di.AppComponent → com.example.di.ActivityBuildersModule_ContributeAuthActivity$app_debug.AuthActivitySubcomponent]

FAILURE: Build failed with an exception.

I think this issue is somehow related to

@Nullable

annotation used by the IDE but I am not sure about the exact issue, can somebody explain about this issue?

any ideas someone?) or unclear?)

Hello everybody. I'm in a weird case. I'm trying to debug some code but my debugger never stops at finally blocks, does anyone knows why? To me the finally block should be reached all the time, right?

Hello people. Is there any performance advantage about using retrofit with the suspend modifier to use them in coroutines? It's the version starting at 2.6.0. Which thread will retrofit use in this case? How is this working behind the scenes? Using coroutine thread or some other retrofit thread? The coroutine threads are supposed be "cheaper" and I need to make upto some hundred requests simultaneuously.

Any ideas guys?)

Use #splitties

Do you have any idea @Kris Wong?

Wondering if the order of interceptors plays a role in retrofit?

Did Android Studio 3.5 remove “Use same device for future launches” ???!!!?!

Hello, does anyone know how to use Exoplayer with TextureView. I'm trying to make it Fullscreen. I don't have a lot of experience with TextureView

In your opinion what is the best library for loading images to use with kotlin?

Has any one faced

Fatal Exception: java.lang.IllegalStateException: Already in the pool!

crash

Fatal Exception: java.lang.IllegalStateException: Already in the pool!
       at androidx.core.util.Pools$SimplePool.release + 117(Pools.java:117)
       at androidx.recyclerview.widget.AdapterHelper.recycleUpdateOp + 743(AdapterHelper.java:743)
       at androidx.recyclerview.widget.AdapterHelper.recycleUpdateOpsAndClearList + 750(AdapterHelper.java:750)
       at androidx.recyclerview.widget.AdapterHelper.consumePostponedUpdates + 123(AdapterHelper.java:123)
       at androidx.recyclerview.widget.AdapterHelper.consumeUpdatesInOnePass + 557(AdapterHelper.java:557)
       at androidx.recyclerview.widget.RecyclerView.processAdapterUpdatesAndSetAnimationFlags + 3701(RecyclerView.java:3701)
       at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep1 + 3945(RecyclerView.java:3945)
       at androidx.recyclerview.widget.RecyclerView.dispatchLayout + 3755(RecyclerView.java:3755)
       at androidx.recyclerview.widget.RecyclerView.consumePendingUpdateOperations + 1888(RecyclerView.java:1888)
       at androidx.recyclerview.widget.RecyclerView$ViewFlinger.run + 5163(RecyclerView.java:5163)
       at android.view.Choreographer$CallbackRecord.run + 916(Choreographer.java:916)
       at android.view.Choreographer.doCallbacks + 718(Choreographer.java:718)
       at android.view.Choreographer.doFrame + 647(Choreographer.java:647)
       at android.view.Choreographer$FrameDisplayEventReceiver.run + 902(Choreographer.java:902)
       at android.os.Handler.handleCallback + 836(Handler.java:836)
       at android.os.Handler.dispatchMessage + 103(Handler.java:103)
       at android.os.Looper.loop + 232(Looper.java:232)
       at android.app.ActivityThread.main + 6802(ActivityThread.java:6802)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run + 1103(ZygoteInit.java:1103)
       at com.android.internal.os.ZygoteInit.main + 964(ZygoteInit.java:964)

I am facing this weird crash on production. Can any one please help

Hey, now that Retrofit since 2.6 supports

suspend

using behind the scenes

Call

interface and then enqueuing it do we need to wrap a retrofit call with a

withContext

IO

scheduler ? As actually the

enqueue

will already do the call asynchronously and we are safe with calling it on the Android mainthread

Why i'm getting

Cannot inline bytecode built with JVM target 1.8 into bytecode that is being built with JVM target 1.6. Please specify proper '-jvm-target' option

while using

viewModel()

function to get fragment's viewmodel ?

Here's a random dream: Android resources ids (

R.sometype.stuff

) generated as inline classes.

Hello guys. We are new to AAC. We are wondering how we should or where we should keep the state of our Auth. At first glance we thought of having a central AuthViewModel, but we have few activities and the view model couldn't be share as far as I know. Now we are thinking on keeping the state in the AuthRepository. Could anyone share experiences on it? Regards!

image.png

Is this a Kotlin or an R8 bug?

java.lang.LinkageError: Method void g.y4$b.a() [aka

app.SomeFragment.Model.clear()

] overrides final method in class Lf/n/j0 [aka

androidx.lifecycle.ViewModel

];

The method in question is

fun clear()

in my own

ViewModel

subclasses.

clear()

in Android’s

ViewModel

is

final

with package-visibility so the

clear()

of my own subclass should be treated as a completely different function!

I don't know if this is the correct channel for this question, so forgive me if it is not the correct place. I want to add dependency:

androidx.lifecycle:lifecycle-runtime-ktx:$androidLifecycle

in a library project If I add this dependency in an Android library project there is no problem, but if I add this dependency in a normal kotlin library the extension functions cannot be found. This import statement stops working:

import androidx.lifecycle.lifecycleScope

But this doesn't:

import androidx.lifecycle.LifecycleOwner

I am creating a library that have a dependency on the androidx lifecycle but I don't need resources or access to any normal

android.*

dependency, that's why I'm trying to use a normal kotlin library instead of an android library Any idea on why this is happening?

// (A) no warning
if(Build.VERSION.SDK_INT >= 26 ) {
	// using API 26+
}else if(Build.VERSION.SDK_INT >=22) {
	// using API 22+
}else{
	// using old API
}

// (B) waring raised.
// "Call required API level 26 (current min is 21): ..."
when{
	Build.VERSION.SDK_INT >= 26 ->{
		// using API 26+
	}
	Build.VERSION.SDK_INT >=22 ->{
		// using API 22+
	}
	else->{
		// using old API
	}
}

how to avoid warnings without extra if(Build.VERSION.SDK_INT >= ... ?

Hi, what do you guys use for LiveData single(one time) Events, previously i was using

SingleLiveEvent

but previously i had seen some type of

Event

(don't know exactly what it was called) class. i have seen that class somewhere in google architecture samples or in I/O talk but now i'm unable to find that, can you guys please let me know if

SingleLiveEvent

is best for one time event or is android team provided some other solutions ?

Hi! I'm planning to move

MVP

apps to

MVVM

(Or even create a new ones with that architecture), so I'd like to know if there's any reference

github

repo that you are looking and recommend to me, that which contains

Clean Architecture

with

Kotlin

as :

Navigation

,

Coroutines

,

Multi-module

,

Dagger2/Koin/Kodein

,

ViewModel

,

LiveData

, etc...? I'd love to learn this to increase my knowledge doing clean apps. Thank you guys 😄

if your making something like an RSS reader and the user clicks to be taken to a rss link site like BBC or whatever, is it okay to do that with a webview or is a custom chrome tab the way to go (and how compatible is that feature with older apis)? Some of these sites seem to be opening the browser instead of populating the webview which shouldn't be happening. I do need to put controls to my site on top of each site visited.

Hi! Im doing Clean Architecture pattern in my app. Let’s say I have a

Product

item. Now, that

Product

must contain

category

and

subcategory

. Currently, the API only returns the

guid

of the category and subcategory. Now the question is. Should the mapping of getting the

category

and

subcategory

from the API and putting them inside the

Product

class be inside the

data

module? OR I can put it inside my

GetProductUseCase

? If I choose the latter. So my usecase would look something like this:

getProducts()
    .zip(repo.getCategory(), repo.getSubCategory())
    .flatMap { 
        product.category = category
        product.subcategory = subcategory
     }

What’s the best practice for this?