Questions related to Kotlin Android Extensions
Questions tagged [kotlin-android-extensions]
721 questions
6
votes
3 answers
Kotlin crashes in PasswordTransformationMethod while Java works fine
The code below crashes in Kotlin/Android with the stack trace provided on the bottom. It was converted from Java/Android, which didn't have such a problem. Original Java code is provided as well. The crash happens when I try to add a character to a…
Oleg Gryb
- 5,122
- 1
- 28
- 40
6
votes
1 answer
Kotlin's @Parcelize throws NPE on writeToParcel()
I have this set of data classes, all in the same file:
@Parcelize data class Response(val RecordView: RecordView):Parcelable
@Parcelize data class RecordView(val Records: List):Parcelable
@Parcelize data class Gid(val Value:…
TooManyEduardos
- 4,206
- 7
- 35
- 66
6
votes
4 answers
Kotlin explain me about Backing Fields
I have been looking at Kotlin official tutorial. I came across the topic called Backing Fields
It says,
Classes in Kotlin cannot have fields. However, sometimes it is necessary to have a backing field when using custom accessors. For these…
Zumry Mohamed
- 9,318
- 5
- 46
- 51
6
votes
4 answers
Kotlin - Android can we implement OnClickListener on Class?
I'm starting out with Kotlin and seems that onClick does not trigger if I implement it on an Activity Class
class MainActivity : AppCompatActivity(), View.OnClickListener{
override fun onCreate(savedInstanceState: Bundle?) {
…
johnguild
- 435
- 1
- 5
- 25
6
votes
1 answer
using Kotlin @Parcelize together with polymorphism
Hey I'm using one model as DTO, JsonCreator and Percelize
my problem is that i want to use polymorphism (disassemble common part) and have no idea how to write it in Kotlin.
@Parcelize
@Entity
open class Location (var lat: Double = 0.0, var lng:…
murt
- 3,790
- 4
- 37
- 48
6
votes
1 answer
Android studio 3: Outdated Kotlin Runtime
I don't use kotlin in my current a project, but always showing following warning:
When I click to "Update runtime" will be show following popup:
And here dependencies who i used:
Anybody know how to solve this google trick?
**Edit
This is bug of…
Fussball Treff
- 71
- 4
6
votes
1 answer
NoSuchMethodError using @Parcelize Annotation in Kotlin
I'm currently trying out the experimental (which might be why it's not working...) @Parcelize annotation to generate Parcelable code. Most types seem to be working fine, but I'm having issues with Serializables throwing a NoSuchMethodError:
…
Submersed
- 8,810
- 2
- 30
- 38
6
votes
1 answer
Android Studio / Kotlin - invalid error "Overriding method should call super"
I have a BaseActivity class which is extended by a ContainerActivity class. Because I want to use BaseActivity in several other projects I moved it to an Android library that I added as a gradle dependency to these other projects. Other than moving…
zafrani
- 4,030
- 5
- 31
- 39
6
votes
2 answers
Kotlin reified type function as function extension - Callable from Java?
I'm trying to use a function with reified type as extension function but I don't think that it's possible because after I checked the generated bytecode I have find that the method signature is private, any work around to make it public…
TooCool
- 10,598
- 15
- 60
- 85
6
votes
1 answer
Unable to reduce a list of booleans in kotlin
I am trying to map to boolean and reduce in kotlin. This is my code
class Model{
fun isEmpty() : Boolean
}
list.asSequence().map { model ->
{
model.isEmpty()
}
}.reduce { acc, next -> (acc && next)}
But compiler gives me…
Ashwin
- 12,691
- 31
- 118
- 190
6
votes
3 answers
getActivity() / context in a ViewHolder in Kotlin Android
I'm building a ViewHolder and Adapter for a Fragment and when I try to make an OnClick for the ViewHolder, none of the contexts I pass in work. There is no activity from getActivity() that I can use, and p0!!.context nor itemView.context work…
user3338275
- 240
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- 3
- 13
6
votes
1 answer
I can't understand source code implementation of string.kt in kotlin
In kotlin source code, I can't understand how to implement of length of String.kt , it is as following:
package kotlin
public class String : Comparable, CharSequence {
companion object…
Jim Green
- 1,088
- 3
- 15
- 40
6
votes
1 answer
Reference View From Included Layout
I have a fragment layout with the following include tag:
Hobbajt
- 267
- 3
- 14
6
votes
2 answers
Kotlin,Java,multidex,Dagger 2,Butterknife and Realm: transformClassesWithJarMergingForDebug: duplicate entry: org/jetbrains/annotations/NotNull.class
We have existing Java Android code. We want to painlessly slowly start moving to Kotlin. We use Dagger 2, Butterknife and Realm. We use Java 8 compiler (but our targetCompatibility and sourceCompatibility are 1.7).
I've been roaming the web for…
Tar
- 8,529
- 9
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- 127
5
votes
2 answers
Why do I get "unresolved reference" error for my view's name/ID when I type it in Kotlin?
I am following a tutorial exactly. I gave the view a name in the layout XML file under android:id. When I type that name in Kotlin, it is highlighted in red and there is an "unresolved reference" error.
For example, in XML…
Tenfour04
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