Hello all, is there any way to test a

RecyclerView.Adapter

on a local VM? I have mocked some stuff but I'm getting a NPE when

notifyDataSetChanged

gets called

I have a long question about programmatic vs design/xml UI using kotlin in Android; coming from an iOS/Swift background. I’ll post the body of the question as a threaded reply to this to avoid a ginormous post here.

has anyone ran into issues with jacoco and Kotlin? Such as execution data not matching for certain class files

Hey guys ! A quick question, maybe too much technical. Did you ever experienced a bigger app size (on device, via playstore installation) when using Kotlin instead of Java ? Did the add of kotlin std lib to the apk is managed on device by the playstore or gservice ?

Hello everybody,

AsyncLayoutInflater

which kind of situation to using it? thanks

Hey everyone,fast question!, I'm looking into the CameraX library, I wonder if its possible to make it Continuous scanning on barcodes with the use of firebase ml kit?

That's what I'm guessing it is yeah

Hey, how do you all distribute builds that may be pointing to QA servers to test a feature. For example, pretend you’re fixing a server-side bug that impacts an android app and need a QA team to verify the fix. How do you distribute the APK? Manually building it via android studio or distributing it through an alpha/beta track in the play store both seem wrong.

AS 3.6 Canary 12 users heads up: It seems like ConstraintLayout

2.0.0-beta2

is still broken in AS

3.6 Canary 12

, with AGP

3.6.0-alpha12

. It was previously broken on

3.6 Canary 11

with AGP

3.6.0-alpha11

as well. Some resource linkage is broken when building, e.g.

AAPT: error: resource attr/flow_horizontalSeparator not found
AAPT: error: resource attr/motionProgress not found.

It was previously working fine in AGP

3.6.0-alpha10

. Issue tracked on : https://issuetracker.google.com/issues/140678030 Possibly related to: https://issuetracker.google.com/issues/140882056

hello people, Anyone using kotlin DSL to manage gradle builds? Is it worth it? What impact does it have in build speed?

Hello guys I have a question regarding the flatmap for kotlin and rxjava2. I have an observable of a data class that has a nested list

fun getCenterServiceCategories() : Single<CenterServiceCategories>
// ..
data class CenterServiceCategories(
    val meta: MetaResponse,
    val data: List<ServiceCategory>
)

what I want to do The ServiceCategory also has a list of ids that I want to loop through and eventually return a flatmap that has the list of categories with their services embedded. The problem is that I cannot call

getCenterServiceCategories().flatmap{ 
//...
}

since the list is actually the data property. i have tried subscribing and getting the data onSubscribe and using Kotlins map and flatmap, but I want to do that with RX any suggestions?

How to pre-cache images using Glide ?, i want to pre cache images from

res/drawable

folder. sorry i know it not related to kotlin but i'm unable to find good answer

Hi there guys, I'm using navigation, single activity and fragments + dialogs + main fragment is a google map. Issue, doing things like:

alert(getString(R.string.MY_MESSAGE)) {
            yesButton {
                it.dismiss() // TODO investigate navigation from dialogs and lag
                navigateTo(actionMapFragmentToOtherFragment()) }
            noButton {}
        }.show()

The app freezes when navigating back to the map. Ideas?

So, opinions, is kotlin synthetics for android dead now due to view binding being a built in feature to the gradle plugin in 3.6?

Hello. Not sure if this question is for here or #getting-started but… If I wanted to start learning Android app development would I be better off learning Kotlin first or Java? (it would be my first proper programming language outside of learning the basics in a few back in college)

Does anyone way to implement a two pages viewpager so it shows like a book, giving that I could add a page turn flip, I tried to override

getPageWidth()

but this will not be helpful when adding animation

I have nested fragments and then Using

ktx

function

by viewModels

how can i get parent Fragment's

ViewModel

? I have tried this

private val homeViewModel by parentFragment!!.viewModels<HomeViewModel>()

but it did not worked

hello people How can I convert this to kotlin DSL?

debugimplementation = "com.squareup.leakcanary:leakcanary-android:$Versions.leakCanary"

Hello everyone, I use this

<https://jitpack.io>

to distribute my library , but I only want to distribute specify module

Navigation

without app and dependencies in app layer . so How to do it on Jitpack . Thanks

<https://github.com/chihung93/Space-Navigation-V2>

Can someone share a recommendations for the best android book for experienced developers but no android experience

Does any one have ideas on why gradle could produce an unsigned apk? I do properly setup signing configs, I checked and rechecked. I even diffed my

build.gradle

with another project which has exaclty same signing configs and produces a signed apk, but this one isn't.

$ jarsigner -verify /path/to/apk

jar is unsigned

Alarm fired once, but getting same time slot alarm twice

I think it is becoming common knowledge that using

@JvmOverloads

for custom views on Android can bite you if you don’t do it properly. What I haven’t seen in this discussion yet, is that most probably (because in Kotlin

final

is the default), you only need the 2 constructors in your custom view, and so you should be just fine using

@JvmOverloads

for it. https://medium.com/@arekolek/all-your-classes-are-final-so-why-do-you-even-need-the-3-argument-constructor-d35553dd6347 What do you think?

@jw any chance of R8 not failing when it runs into Dexguard rules? https://issuetracker.google.com/issues/141515605

I’m trying to create a BindingAdapter in my customer view but the changes won’t take effect. As an example the custom view can take in a color and draw a rounded rectangle with it. Everything works correctly reading the custom attributes from attrs file, where the color is fetched in the CustomView’s init{} block, then the color of the paint object is set to this color and in onDraw() the shape is drawn correctly. However if I try to use a BindingAdapter with Data Binding Library, the color isn’t applied. The code for the BindingAdapter is inside the custom view like this:

companion object {
        @BindingAdapter(“app:bgColor”)
        @JvmStatic
        fun setColor(view: ElevatedFrameLayoutWithBinding, color: String) {
            view.backgroundPaint.color = Color.parseColor(color)
        }
    }

Edit: After further investigation when using the above code onDraw() for the custom view isn’t called, however if I add the attribute normally without Data Binding and the BindingAdapter onDraw() is called as normal.

seems easier than trying to make the view controllers `LifecycleOwner`s and observing livedata

not kotlin related, but android related.

Name: Pixel_2_API_28
    Path: /Users/sridhar.vadlamani/.android/avd/Pixel_2_API_28.avd
   Error: Google pixel_2 no longer exists as a device

I’m getting a bunch of those.