async() is not readable through my code , i tried to do long running processing with async()

I'm seeing a really odd

NoClassDefFoundError

, anyone have any thoughts? Throws a `NoClassDefFoundError`:

val intent = Intent(this, MyActivity::class.java)
startActivity(intent)

Works fine:

Handler(Looper.getMainLooper()).post { 
  val intent = Intent(this, MyActivity::class.java)
  startActivity(intent)
}

EDIT: This only happens pre-lollipop.

Stupid question — are unused extension functions able to be proguarded?

I am working on an extension library and I need to know that I’m not going to bloat method count

they are static methods in the end so it should.

Should be proguarded no problem. In fact if you make them inline (if you're just doing something like small single-statement extensions), those would actually get proguarded out completely and not contribute to the method count at all.

I have very important question : I am now going to implement new business app in my company

do you suggest me to implement it in kotlin or Java ?

Note : My experience in Kotlin is only 2 weeks , i got familiar with its syntax ,but i do not have big knowledge related to it

Please advise

You can begin writing in kotlin java-style then move to kotlin ideomatic

you mean no need now to follow all kotlin best practices ?

as i found a lot of change in means async ,extension functions … etc

Attempting to set the

theme

attribute on an element with Anko, but I'm not really seeing that it's possible. Am I missing something?

Is this possible?

@abanoub.wagdy91

async

and

extension functions

are not best practices, they are just different ways to write code. You can safely ignore them until you fully understand how to use them.

i don’t if this is the right place to post but i think all new develop with kotlin will meet this problem

solution : upgrade kotlin to 1.1.2-4 to resolve this problem

Hey all. I'm playing around with Room Persistence Library in my fitness app for my database. I'm using Kotlin and I've hit a bit of a snag. For my select Query I am trying to write one that would read as (SELECT DISTINCT Category FROM Exercises), but I'm not quite sure how to write the function for that. Can anyone push me in the right direction. The DISTINCT is what I'm having trouble with. I've attached a small screen shot that shows my table/headers. Table name is Exercises

@User uploaded a file:

you try:

@Query("SELECT DISTINCT Category FROM Exercises")
fun queryDistinctExercises() : List<DistinctCategory>

data class DistinctCategory(@ColumnInfo(name = "Category") val category)

I got pulled away from my computer, but I'll try that when I get back. Just having a mental block. But that looks good to me. Thank you!

np

I'm getting a crash that appears randomly, the code is very simple:

<http://mainHandler.post|mainHandler.post> {
    if (messages.removeIf { it.id == messageId })
        messagesLiveData.value = messages
}

The error is: NoClassDefFoundError: com.example.service.WebSocket$markNotificationRead$1$1 com.example.service.WebSocket$markNotificationRead$1.run

So I'm assuming this means that I'm not generating the Runnable correctly?

If like me you want to be alerted when your kotlin code call an java method which throw checked exception and it isn't catched, i created an improvment https://youtrack.jetbrains.com/issue/KT-18276

Hi Guys i faced the following problem while building gradle

Error:Error converting bytecode to dex: Cause: PARSE ERROR: class name (com/pharoslive/views/buttons/RobotoBoldButton) does not match path (com/pharosLive/views/buttons/RobotoBoldButton.class) ...while parsing com/pharosLive/views/buttons/RobotoBoldButton.class

note : I am using only kotlin classes