It's for declaring that you're certain about a (nullable) object not being null. You could ask more about it in #getting-started, for instance.

I’m having trouble locating documentation for Kotlin Gradle documentation pertaining specifically to Android. Does anyone have a good resource?

When we use Android APIs( e.x. AppCompatActivity) from Kotlin code, does that mean they have developed Kotlin wrapper around existing Android SDK?

how to write a kotlin model class

This is the error

Does anyone know if Kotlin 1.3 is backwards compatible with 1.2? Got a library using Kotlin and want to know if upgrading to 1.3 will be a big deal for apps that are using 1.2

If the same type parameter needs more than one upper bound, we need a separate where-clause. However i'm getting error at line no. 5. Please help!

What's the best way to do resource plural strings with placeholders when the string contains two different words that can be plural?

I'm new to Kotlin ... What tutorial do you recommend? I have Android Studio 3.2.1

hi guys. i’ve been using kotlin server side for little bit now, and thought of learning using it for android as well. can you direct me to some helpful resources to kick start this plan of mine? i also dont have experience with android development, so this might be challenging 😄

Guys, I am receiving as a parameter in a override function a String that must to be transformed to lowercase. Is possible to do this in param declaration?

Hi guys I want to implement a tour guide on app launch in my android app, like using transparent screen, any good library for that in kotlin?

Hey guys, what can I use for Android static analysis? Thanks in advance 😁

in Fuel i am trying to update it to kotlin 1.3.20, but our android sample blows up with these messages: https://gist.github.com/NikkyAI/e665290892529a428c1ba3fc2fcc4ea0 i have never worked with android before (apart from a small project back in school years ago) and i have honestly no clue what this may mean

I am new in kotlin language. Please suggest me some good tutorials for learn kotlin for Android. I have experience in android with java. Thanks in advance.

Hey Guys, I am facing issue regarding mockito test case for coroutines. It is not executing api call function. Please have a look below code. It is MVP based structure //MVP Structure GlobalScope.launch { // API CALL ON MAIN THREAD val result = //Model return some values GlobalScope.launch(Dispatchers.Main) { when (result) { is APIResult.Success ->(result.response.data) is APIResult.Failure -> parseException(result.details) } } } } Any suggestion?

Hello people, I have a weird issue. While im building/compiling my android application that has kotlin and java parts it takes about 10-15 mins. When i check gradle logs i see a statement like “could not connect to kotlin daemon. using fallback strategy.” which is true since i can see 2+ kotlin compiler daemon processes. How can i find the root cause for this problem?

Is it possible to open an android project that is a child project of a kotlin multiplatform project with Android Studio? If not, are there any caveats to using IntelliJ to develop on Android?

Hello,Please can you help me ? I am beginner. Where can be a bug ? /Kotlin/ Thanks

Hey guys, can anyone help me with this? I have to get an object from Cache and this is the way that I do... Does anyone have a better way to do this?

Is anyone using MvRx? How good is it? Any recommendation of a lib or framework to tame the "dragon called state"? I feel like I could optimize my workflow by containing mutations and impurities (in a FP sense) and would like to ask you some recommendations about this kind of tools.

Room creates a json file containing its schema information. If you look at it, you'll find a create statement for each table.

Hi, my colleague run unit test's on kotlin ( he used mockk) and saw speed of executes test's more slowly than java. why ? what is better use for unit test's on kotlin ( some libraries) ?

Android synthetic imports suddenly stopped working for me. Any idea what’s happening. Imports seems to be working or AppCompatActivity but not for v4.app.Fragment

Does anyone knows if there is a way to properly mock a suspend function?

Anyone have any idea why Gradle is redownloading the Kotlin native dependencies every time I sync Gradle in Android Studio 3.3? Why isn't it using a cached version? It is killing my build times. I am using the multiplatform plugin

I used kotlin lazy property in serializeable class. It works well in debug mode build, but crashed in release build (with proguard). I've solve this issue by adding below rule to proguard settings.

-keepclassmembers class * {
 *** writeReplace();
}

androdi application code: https://gist.github.com/kingori/518e8afcb6fb4d90b81eb8348395f39e post on this issue( in Korean) : https://steemit.com/kotlin/@kingori2/kotlin-lazy-field-serialize-proguard

In a non lifecycle class, how should we use coroutines? I have read that your class should extend CoroutineScope if it is a lifecycle class (Activity, fragment, viewmodel). But in just a simple business logic class, how would you use CoroutineScope?