I want to create a small task (60 minutes) to evaluate a candidate's code skills. How would you design such a test?

With the changes made to kapt in 1.3.31, kotlin does some aggressive caching to decrease incremental built times. Unfortunately, some annotation processors and kapt don’t work well together and the cache is not properly invalidated in some conditions. - Deleted classes with

@Inject

may still have code generated for them. - Moved classes with

@Inject

may still have code generated in the old location. This behavior is enabled by default in Kotlin 1.3.31. Is there something I need to configure kapt to ensure the cache is properly invalidated? This is causing some issues for my team, especially when we switch between branches. Thank you! I’ve beed getting sub 1 min incrementally builds for the first time in months.

this isn't working

-assumenosideeffects class mypackage.Log {
    public static void v(...);
    public static void d(...);
    public static void i(...);
}

and can't apparently get kotlin syntax working

Hey all! I have this drawable:

<layer-list xmlns:android="<http://schemas.android.com/apk/res/android>">
    <item>
        <shape android:shape="oval">
            <solid android:color="@color/black"/>
        </shape>
    </item>
    <item
            android:drawable="@drawable/btn_pen"
            android:bottom="20dp"
            android:left="20dp"
            android:right="20dp"
            android:top="20dp"/>
</layer-list>

And I want to programatically change the color of the oval shape, is there any way to do that (so far I’ve not found anything useful via Google searches)?

Does anyone know of any books that are for experienced Kotlin developers who are learning Android? Like, not learning Kotlin through Android, but the other way around? Or does that not exist? Looking for any other resources to flesh out my Android knowledge as well, if anyone has any to share 🙂

Hey guys, did anyone have that one before? Google doesn't yield any useful result. I can't get the initial Gradle sync working.

New Gradle Sync is not supported due to containing Kotlin modules using an unsupported plugin version

https://scans.gradle.com/s/x2sugy65vmttq#failure Gradle 5.1.1/5.3.1/5.4.1, Kotlin 1.3.21/1.3.31, Kotlin IDEA Plugin 1.3.31, Android Studio 3.4 I've tried different Gradle and Kotlin versions and different ways of loading Kotlin/Android gradle plugins without success. EDIT: wow, Android Studio 3.5 Canary: New Gradle Sync is not supported due to containing buildSrc module

I am thinking about turning

View

clicks into

Flow<T>

, has anyone done this? What approach did you take? If you think it's a bad idea, why?

Is anyone aware of an open source project of a class that wraps a java.sql.Connection and implements SupportSqliteDatabase (or related AndroidX interfaces)?

This message was deleted.

Hello everyone, I'm looking for a beginner-friendly resource to learn coroutines with

Is it worth implementing Parcelable in Kotlin Enums? As far as I know in Java enums is more efficient implementing parcelable, but I don’t know how the serialization for kotlin enums works under the hood

Doesn't seem related to Kotlin

It turns out that

Double.toString()

uses some default (?) locale , while

String.format("%.1f")

uses the locale selected by the user. So, I end up with two different decimal separators in the same message (both ‘,’ and ‘.’) Is this expected behavior?

I have been googling around but don't seem to be able to get this working, I am writing a unit test for my ViewModel, and am trying to set a MutableLiveData<String> var in my ViewModel, via the test, however the value is never actually set, and the logic I want to test depends on this value not been null. In my test I am using:

@get:Rule
    var rule = InstantTaskExecutorRule()

Any idea what else I may be missing?

Is there a way to write snake case view ids in XML and use camel case variable names for the view in Kotlin while using Kotlin Android extensions plugin? I don’t won’t to break conventions and use camel case as view ids in XML, but it seems that there is no other way

Anyone tried to tackle the Compose thing? It seems that studio build with preinstalled kotlin plugin is stored on the private server maintained by the Compose team

Hey guys, can

Parcelable

be used with

sealed class

when some of its children are

object

?

Anyone is using

<https://github.com/florent37/Multiplatform-Preferences>

? Gradle imports this dependency successfully and the symbol is recognized but I get the compile error

Unresolved reference: Preferences

when trying to use it

Additionally, I expect

android.xxx.

symbols will be visible in the

androidMain

code but compiler does not find them in my case. How is it supposed to implement

actual

methods if I need android namespace methods?

can anyone point me in the right direction?

https://medium.com/@burakeregar/jetpack-compose-android-apps-without-xml-534d74448778 I wrote an article about Jetpack Compose which announced yesterday at Google I/O. Any feedback would greatly appreciated!

A small sample of using it

Column(
					Weighted(
						Column(
							Gravity(Center),
							ImageWizard(
								ImageProperty(R.drawable.anonymous),
								TextProperty(R.string.anonymous),
								TextProperty(R.string.anonymous),
								anonymousVisibility
							),
							ImageWizard(
								anonymousImage,
								TextProperty(R.string.anonymous),
								TextProperty(R.string.anonymous)
							)
						)
					),
					Button(
						Primary,
						TextProperty(R.string.anonymous),
						Clicks { anonymousClicks.onNext(Unit) },
						Margins(top = Material, bottom = MaterialSmall, left = Material, right = Material)
					),
					Button(
						Secondary,
						TextProperty(R.string.anonymous),
						Clicks { anonymousClicks.onNext(Unit) },
						Margins(bottom = Material, left = Material, right = Material)
					)
				)

This is just a wrapper around existing Android views though

Apologies for taking us away from the declarative UI goodness but I'd appreciate some help with an issue with Kotlin lambdas and ProGuard. When any lambda code is run at runtime I receive an exception stating that the

invoke

method of that lambda is abstract.

Any help appreciated..thanks

How to make an extension function for showing Toast inside of both Activity and fragment. My take on this:

Beginning android dev questions: I’m looking to implement infinite scroll functionality. I was thinking of just adding a scroll listener to check the last visible item, and then fetching more data from the network if needed. Google searches have revealed that another option would be an architecture that includes the pagination library, with view models, and a repo? I guess it seems like a bit overkill so I was curious if other (more experienced) devs think it’s worth it to use the jetpack components for this.

I’m really confused by this stacktrace that I’m seeing:

0 java.lang.NullPointerException: throw with null exception
1 at com.domain.app.data.models.ReverseGeocodeData$ReverseGeocodeMeta.getAddress$app_releaseFlavor(Unknown Source:3)
2 at com.domain.app.data.models.ReverseGeocodeData.getAddress(SourceFile:23)
3 at com.domain.app.main.home.map.MapPresenter$geocodeCoordinateAddress$1.invokeSuspend(SourceFile:1050)

I’m confused by the function signature

com.domain.app.data.models.ReverseGeocodeData$ReverseGeocodeMeta.getAddress$app_releaseFlavor

. What causes the

$app_releaseFlavor

to be appended to the name? I’m not really sure how to debug this, because the call chain appears to expect null and transform it at all the correct points.

How to handle Login request with coroutines and retrofit. I have a problem where I make async request and await in my repo and in viewmodel I call that suspend function with coroutine scope and launch builder, but in my view (fragment) the next line is "evaluatestatuscode" so that function is called without waiting for request to finish. Do I need another Coroutine in my view too? My question is how can I get to request status code. So when I get 200 I transfer to next screen and when I get 401 I display a message.