Is there a way to force Gson to discard any JSON object with null properties when marshaling into Kotlin's non-null data classes? I am working with a client's backend and can't guarantee they won't break their contract, but also don't want nullable objects floating through the entirety of an application.

I am trying to use Room Database in my app. My ques is, do I need to open and close the database manually? If yes how and when? If no should I call

build

on room object on my activity launch or lazily whenever I need it?

Hi all! Can I ask a little question here? I'm looking for some help about porting an app from Android to Kotlin

Hi, is it easy to port an old Android project like this (see refs below) to Kotlin? https://github.com/giuliohome/TweetSearch What is the suggested way to approach this task? Thank you 👏 I mean: is there a method to minimize the "code rewrite"?

One last question for today, just out of my curiosity, is anyone using the new http://arrow-kt.io/ for an Android app with Kotlin? Does it sound convenient for real-world requirements or (which I suspect) a bit an overkill...??

Delegated properties are so amazing, where in real life is it a good to use? (I accept tips with any thing to read with real examples)

Hello, has anyone used dagger in a mixed java/kotlin codebase? I’ve found solutions like https://medium.com/@manuelvicnt/kotlin-integrate-it-with-your-complex-android-project-dagger-mockito-a4c71a8f2574 But still no luck. Any tips?

Thanks, that is really a pain to find

I can't find anything on slashdot or google about this problem.. I am getting a crash in kotlin realm extensions... Process: com.agersens.eshepardcollarfitter.production, PID: 9241 java.lang.IllegalAccessError: Method 'io.realm.RealmQuery io.realm.RealmQuery.createQuery(io.realm.Realm, java.lang.Class)' is inaccessible to class 'com.vicpin.krealmextensions.RealmExtensionsKt' (declaration of 'com.vicpin.krealmextensions.RealmExtensionsKt' appears in /data/app/com.agersens.eshepardcollarfitter.production-1/split_lib_dependencies_apk.apk) at com.vicpin.krealmextensions.RealmExtensionsKt.forEntity(RealmExtensions.kt:246) at com.vicpin.krealmextensions.RealmExtensionsKt.queryFirst(RealmExtensions.kt:41) at com.maiatehcology.maialibrary.syncframework.database.DatabaseWrapper.fetchAnimals(DatabaseWrapper.kt:78) The code is very very similar to what I used in a previous project without incident...

Well, I understand. So... Maybe do you have an example of Kotlin Android app reading and writing from Google Drive which is targeting api level 25? Thanks again

@Giulio if you really want to dive into you can have a look into the manual building and signing process (zipalign, jarsigner etc.) to unpack your app and then change and repack, align and sign your app. But i agree @gildor and @oday that it is better to solve the root of the problem...

Hi all, I hope I'm not posting this in the wrong place, please feel free to direct me accordingly if so: I'm experiencing issues running 'gradlew install' in Android Studio 3.0.1, Kotlin 1.2.21, JDK 8. It keeps failing with

compileReleaseKotlin

but none of the solutions I've tried seem to work. I'm wondering if anyone else has experienced the same issue? running --stacktrace, --info, --debug, and --scan all build successfully, it's only 'install' that doesn't.

Frustratingly the logs display no other information.

Do you have an idea how to import into android studio a project that use gradle kotlin DSL ?

So will Kotlin Native ever make it to flutter🤔

Does anyone know what presentation software people are using to get these nice animations in their code samples? i.e. @jw What do you use?

Is anyone using kotlin coroutines as a replacement for rxjava? I'm starting a new project, and am considering coroutines in place of rxjava. I'm wondering what peoples thoughts are around this.

it will be available in a future versions of Kotlin. There is internal Kotlin API called Contracts, but it’s not ready yet It will help compiler to understand contact of such functions

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Hi, I just came across this where we are extending context with a toast function: https://github.com/android/android-ktx/pull/290 The call to toast becomes a lot nicer because we can just do

toast(...)

without worrying about

show()

etc My issue is whether this is actually a form of abuse on the extension function mechanism because Toast is not really an extension of context. Similarly, I have come across several examples where extension functions have been used to simply shave off a parameter from the original method call. Any opinions?

Would be interesting to read about the optimizations in ART 🙂

(for new apps)

in 3.2a5 you can enable it with

android.enableR8=true

in your

gradle.properties

. It made my app 14% smaller with no functionality loss and even some regressions on what was removed (meaning there's room for improvement)

i really wish support lib 28 had added more nullable/nonnull annotations in recyclerview 😕

No sql? Maybe you mean document store db? because no sql it’s much more wider thing

Consider a table. For instance, for handling auth sessions, we ended up using a table for storing a single entry. When the client then wanted to support multi user sign in, most of the work for storing that information was already handled.

Has anyone else seen incorrect linting of Kotlin files in Android Studio related to certain collection classes? I'm having trouble with HashMap and ArrayList for example. Compilation yields no errors, only IDE parsing within the editor. I'm using v1.2.30.

I think multiple implementations may be in your classpath.

Android Studio also has one default one. Android studio provides a code style tool which can be customised and exported to be distributed to teams. Path to get this tool is Android Studio -> Preferences -> Editor -> Code Style -> Kotlin Default code style is present which follows https://android.github.io/kotlin-guides/style.html