How do you handle dagger components in gradle modules? I can use a sub-component and everything is fine - however often I don't want to expose the dependencies of my library gradle modules. How do you do that?

I keep dagger out of my library modules

Can kotlin contracts be used for methods that do permission checks? Couldn't find any detailed doc regarding this.

anyone know where I can find the implementation the binding adapter that is used for the recyclerview

app:layoutManager="androidx.recyclerview.widget.GridLayoutManager"

already look in

androidx.databinding:databinding-adapters

but its not there

Hello! Is there any good way to pass the application context to an object? I have a service that interfaces with an API. I think it would be ok for it to be a singleton, as it looks more like a manager than a generic class. Should I create a method

fun init(application: Application) {//do stuff}

or is there a better way?

Hello please help.I am a beginner. I've tried trying ways to initialize Firebase still bugging me but I can not find it where it can be.AS, 3.2.1 Thank you https://hastebin.com/vaficulena.cs https://hastebin.com/javidimawa.cpp

Is there any docs listing all the extension present in Android KTX?

Is configure on demand also not present at all in AS 3.2 for you? https://developer.android.com/studio/build/optimize-your-build#configuration_on_demand

Has someone experiences with the compiler Json serialization? How ready for production is it?

What is Kotlin Migration?

Hello 🙂 I’m a little bit stuck on a lambda, which I tried to use from itself

val listener = {
            lottieAnimationView.viewTreeObserver.removeOnGlobalLayoutListener(listener)    <<<---- here's the problem
        }
        lottieAnimationView.viewTreeObserver.addOnGlobalLayoutListener(listener)

Can anybody help on this please ?

Im using RxFlux in an application that was built originally with java. The

MainActivity implements RxViewDispatch

and catches store changes. On a store change I'm trying to update a single fragment that seemingly cannot listen to the store for changes. Is there a succinct way to broadcast from MainActivity.java to the single Fragment.java class to preform a visual update using the store changes? The interesting part of this is that most of the view that is rendered is controlled by this fragment, I don't want to redraw the entire fragment. NVM - forgot about `Intent`s - iOS Developer in an Android world.

New to android, what's the preferred way of tesing my UI and database correctly interact? I have tests for my Dao, and I have tests for my UI, but I'm unsure how to test that my UI correctly works with my Dao. E.g. clicking the save button correctly saves something to the database.

Hello,please help.I write mistakes. I'm writing a bug.No matching client found for package name 'com.example.jurajsolarml.simpleapp.dev'.How can I fix it? Thanks I try to run an application and list the error, specifically I want to run a firebase registration. google-services.json "package_name": "com.example.jurajsolarml.simpleapp" Firebase setup: Package name com.example.jurajsolarml.simpleapp

I build a library using Kotkin 1.2 (experimental coroutines). Now a android app built on Kotlin 1.3 can consume the library? if there is no public api exposing coroutines, but internally using Kotkin 1.2 (experimental coroutines) in library

Hey, this may be the wrong channel for this. If so, let me know and I'll delete this post. I've never built an android app (been mostly working server-side and front-end for the past few years), and I was wondering if maybe someone could point me towards a good resource for learning the ins-and-outs of building one. I'm very familiar with java and pretty familiar with kotlin as well. I'd prefer to start out with kotlin and make something small just to practice. I realize I can google this, but I thought maybe the people in here might have some more insight/better recommendations.

How to solve? pls

Hey all! I have a coroutines question that I've been struggling with. I am making a network request in the following way:

fun fetchCharacterData(): Deferred<CharacterGenerator.CharacterData> {

return GlobalScope.async(Dispatchers.Default) {

val apiData = URL(CHARACTER_DATA_ENDPOINT).readText()

CharacterGenerator.fromApiData(apiData)

}

}

Then, in my main activity, I do the following within `onCreate()`:

generateButton.setOnClickListener {

GlobalScope.launch(Dispatchers.Main){

characterData = fetchCharacterData().await()

displayCharacterData()

}

}

However, I am getting an ANR whenever the button is pressed. I also get a very vague error message in logcat: FATAL EXCEPTION: main. Would anyone have any insight as to what the issue could be?

What libraries do you prefer for working with recycler views? and how you prefer to work with error, loading views?

Hi All. I'm trying to use a high order function in order to check for permission in Android with this function:

@ExperimentalContracts
inline fun runIfGranted(context: Context, permission: String, fn: () -> Unit) {
    contract { returns(true) implies WHAT'S HERE? }  
    if (ContextCompat.checkSelfPermission(
            context,
            permission
        ) == PackageManager.PERMISSION_GRANTED
    ) {
        fn()
    }
}

. In order to remove the IntelliJ warning, I could use the

@SuppressLint("MissingPermission")

but I think that a contract would be the right solution. In that case, what should I put in the comment in the previous code in place of the literal

true

?

Why is it that SharedPreferences getXXX methods are all marked as returning null? Is there any way to avoid

val foo: String = prefs.getString("foo", "") ?: ""

?

I've run into a strange one recently, and wonder if anyone else has any advice. A java.io.Serializable kotlin data class was written, and then later a 'by lazy' delegate property was added to that class. This showed up as an exception during serialization in two different ways: after Proguard was run, the delegate wasn't getting found, and before proguard an NPE was produced when accessing the delegated property after deserialization. I tried adding

@delegate:Transient

, but in the end, removed the 'by lazy' in favour of a Getter. Thanks for any advice or clarification.

Kotlin-coroutines: Did you encounter this bug when enable R8 and proguard? https://github.com/Kotlin/kotlinx.coroutines/issues/858

Lets say i want to update a user location every 30 seconds, currently i use a runnable with a handler to make this work. Is there a better way to do this is kotlin?

ButterKnife provides button click debauncing under the hood, so user can’t quickly perform multiple button actions by clicking it multiple times. How to achieve this in kotlin + Kotlin Android Extension? Is there any to do it in easily in whole application?

thanks @rnpy for suggestion it look that someone already implemented

DebouncedOnClickListener.java

https://gist.github.com/rfreedman/5573388 - this should be a good start for me

Hello,please,I am a beginner.How do I fix it?,Kotlin,AS 3.2.1. Thank you https://hastebin.com/wolapozoli.cpp https://hastebin.com/zebujipequ.sql

Hey guys! So I hope that this isn't an overly basic question here... I've seen some news about a Kotlin DSL for Gradle scripts. My question is, what does that mean for us Android devs? What can we do with a Kotlin DSL that we can't already do? I will admit that I'm not overly savvy with Gradle, but this did nonetheless pique my interest 🙂

Does

Any

not work for any generic? I have code that's

Expected : <http://Request.POST|Request.POST><Any, O>

Actual: <http://Request.POST|Request.POST><I, O>

and that's causing me some issues