kotlinlang #android

Hi guys, somebody encountered with problem on compiling in project with kotlin? I have message in gradle console: e: Supertypes of the following classes cannot be resolved. Please make sure you have the required dependencies in the classpath: class android.support.v4.app.FragmentActivity, unresolved supertypes: android.support.v4.app.ActivityCompatApi23.RequestPermissionsRequestCodeValidator But some time ago it compiled successful.

3 replies · 3 participants

09/20/2017, 2:35 PM

jre8 has constructs which use APIs only available from Java 8 onward which limits your compatibility more than jre7 which uses APIs only available from Java 7 onward

4 replies · 2 participants

Ricardo

09/20/2017, 3:04 PM

Hi guys. I'm starting a new Kotlin project and wondering which dependency injection library should I use. I've used Dagger2 with Java in the past, but it doesn't seem to fit that well with Kotlin. Any suggestions?

2 replies · 2 participants

kevinmost

09/20/2017, 3:07 PM

most people don't like the

internal lateinit var

syntax they frequently see in Dagger 2, to which I say... you should use constructor injection anyway 🙂

1 reply · 2 participants

Paul Woitaschek

09/21/2017, 8:23 AM

My problem with dagger is that it breaks with kapt so often so I have to do a full rebuild

3 replies · 3 participants

joshdaquino

09/22/2017, 3:03 AM

lol.

2 replies · 2 participants

themarketka

09/22/2017, 7:55 PM

build time went from ~3 minutes to 50 seconds cold, ~10 seconds hot with 1.1.50 😳 ❤️

⏩ 2

🎉 2

😮 3

2 replies · 2 participants

ra1nmak3r

09/22/2017, 9:55 PM

Does

data class

have problem with huge data? I mean, I'm using a

data class

in a

RecyclerView

and this class has some fields (all of them are primitive types) and when applying some animations when the user click in one of the items in the list these animations does not works properly. But if I use a

class

instead of a

data class

, everything works fine and all animations are applied.

4 replies · 2 participants

Shahjahan

09/24/2017, 2:11 PM

What about Active Android?

3 replies · 4 participants

09/24/2017, 2:12 PM

that's an ORM. Definitely not. ORMs are bad.

😆 3

3 replies · 2 participants

09/24/2017, 3:52 PM

you can't just grab the buffer and clone it because it might be empty

3 replies · 2 participants

Jorge Castillo

09/24/2017, 4:02 PM

One rapid question here. I’m trying to do synthetic import for a layout included in a different gradle module (a dependency of the app module)

6 replies · 3 participants

Jorge Castillo

09/24/2017, 4:02 PM

any clues ? is it possible ? @jw?

1 reply · 2 participants

Regan Russell

09/24/2017, 10:37 PM

I am attempt to observe on java.lang.Void but my 204 responses are still coming back with null pointer exceptions: https://gist.github.com/pymblesoftware/30a26505af653a495f95983ad1528958 How do I handle 204s..?

10 replies · 5 participants

myanmarking

09/25/2017, 10:11 AM

not valid package name anymore?

1 reply · 2 participants

Ashok

09/25/2017, 2:33 PM

How can we pass two high order functions to method or constructor like adapter (items:List<string>, click:(Item) -> unit, long click:(item) -> unit)

1 reply · 2 participants

codeslubber

09/25/2017, 4:57 PM

one of the most compelling uses of Kotlin is for unit tests, but after spending hours on getting Spek to work in a vanilla project generated from AS3, I need to move on, found an article about using JUnit where the tests are written in K, is that a good approach? is there a better source than this? https://fernandocejas.com/2017/02/03/android-testing-with-kotlin/

29 replies · 4 participants

09/26/2017, 2:49 PM

I think it's more about tagging him directly. If he only cares about Jake's opinion, why not DM him directly?

1 reply · 2 participants

martin.petrulak

09/27/2017, 9:58 AM

@sqia09 you can do something like :

listOf("one","two","three").sortedWith(compareBy<String> { it.length }.thenByDescending { it.first() }.thenBy { it.last() })

1 reply · 2 participants

Edwin Ramirez Ventura

09/27/2017, 1:38 PM

Sorry, I was searching for something

3 replies · 2 participants

Ashok

09/27/2017, 3:29 PM

val adapter = ShopListAdapter(this@Fragment.context) {
                    val selectedItem = adapter.selected
                    compareItems(selectedItem, it)
                }


class ShopListAdapter(context:Context, onSelect:(String) ->Unit) : RecyclerView.Adapter<VH> {
…..
view.onClick…(…) {
   onSelect(view.tag)
}
...
}

1 reply · 2 participants

Ashok

09/27/2017, 3:30 PM

my question is how can i use adapter variable inside high order function

1 reply · 2 participants

miha-x64

09/27/2017, 5:12 PM

About @Parcelize. If I understood correctly, Kotlin compiler can implement Parcelable in existing class. But what about parcelable wrapper, e. g.

class ParcelSomething(val something: Something) : Parcelable {...

, where

Something

is not parcelable itself?

4 replies · 2 participants

budioktaviyan

09/27/2017, 8:10 PM

guys, anyone knows how to implement junit 5 in android without using any other 3rd party plugin ?

:stackoverflow: 6

6 replies · 3 participants

sodiqoladeni

09/28/2017, 7:12 AM

Hi guys, please I'm new to professional programming have been introduced to it high school but I personally want to learn something meaningful on my own and be good at it. Can someone direct to free online tutorial that teaches Kotlin for android development from beginners scratch to the top, ranges from multiscreen, networking, database and expert level etc. Or someone that has videos or PDF that can share with me. I really want to learn please kindly help.

16 replies · 7 participants

Edwin Ramirez Ventura

09/28/2017, 2:05 PM

I'm trying to implement Dagger2 with Kotlin but I'm getting the following error: A @Module may not contain both non-static @Provides methods and abstract @Binds or @Multibinds declarations

17 replies · 3 participants

Edwin Ramirez Ventura

09/28/2017, 6:19 PM

I'm using Dagger2 and I have a class with a constructor's injection and a method injection but only the constructor is been called.

3 replies · 2 participants

lpirro

09/29/2017, 9:00 AM

@gildor Anyway, aside from ButterKnife, I can use kotlin synthetic for ViewHolders?

1 reply · 2 participants

mugur

09/29/2017, 7:47 PM

Hello, anyone ran into an issue similar to this: https://stackoverflow.com/questions/46486395/java-lang-noclassdeffounderror-com-example-api-retrofit-authenticationintercept?

:stackoverflow: 6

6 replies · 2 participants

blakelee

09/30/2017, 8:14 PM

Does recyclerview have a wrap around method? I want it to loop back to the first element when it reaches the last element. I was looking at fastadapter and I'm not sure what the feature is called

:stackoverflow: 6

2 replies · 2 participants