Questions related to Kotlin Android Extensions
Questions tagged [kotlin-android-extensions]
721 questions
8
votes
1 answer
How to parcelise member variable other than constructor in data class while using @Parcelize
I am using Room and Kotlin data class. Such as,
@Entity(tableName = "Person")
@Parcelize
class Test(@ColumnInfo(name = "name") var name:String) : Parcelable{
@PrimaryKey(autoGenerate = true)
@ColumnInfo(name = "ID")
var id: Long? =…
sadat
- 4,004
- 2
- 29
- 49
8
votes
4 answers
Type mismatch: inferred type is FragmentActivity? but Context was expected
i want to insert menu gridview in tablayout with kotlin. i have been searching for many references in google but it wont help, still getting 1 error in adapter = FoodAdapter(this, foodsList). it says "Type missmatch : inferred type as fragmentHome…
Tri Ako Nugroho
- 135
- 1
- 1
- 7
8
votes
0 answers
Using @Parcelize gives Attempt to invoke interface method 'int java.util.Collection.size()' on a null object reference at writeToParcel(Client.kt:0)
The Code for my Parcelable Model class is below,
@Parcelize
data class Client(
@SerializedName("id")
var id: Int = 0,
@SerializedName("accountNo")
var accountNo: String? = null,
@SerializedName("status")
private val…
miPlodder
- 795
- 8
- 18
8
votes
3 answers
Kotlin - chaining of safe call operator. unnecessary operator calls
Take the following example which uses safe call operator (?.):
class Sample {
class A(
val sampleB: B? = B()
)
class B(
val sampleC: C = C()
)
class C(
val sampleInt: Int = 1
)
fun…
Nishanth
- 1,801
- 21
- 25
8
votes
3 answers
Kotlin view variable is unexpectedly null in Activity onCreate method
I have a small Java Android Studio project, and I used the Kotlin converter in Android Studio 3.0 Canary 3 to convert all four source files to Kotlin. I then made some small modifications to get it to compile. I have only one activity with the…
Eugene
- 3,417
- 5
- 25
- 49
8
votes
3 answers
Referencing views with the same id in different layouts with kotlin android extensions
In my Android project I have two layouts: num_info and num_info_pack. Both have views with id "circle". So I thought referencing those views by layout_name.circle would solve the problem:
val inetView =…
Nazerke
- 2,098
- 7
- 37
- 57
8
votes
1 answer
"projections are not allowed for immediate arguments of a supertype" Kotlin Android Studio
I am getting this error when I converted Java to Kotlin:
Java
public class HeaderTab extends ExpandableGroup {
private String header;
public HeaderTab(String title, List items) {
super(title, items);
}
}
Kotlin
class…
user3124306
- 685
- 1
- 9
- 20
8
votes
2 answers
Kotlin - List within a List filtering
I have those data classes:
data class RouteType(
@SerializedName("type")
val type: String,
@SerializedName("items")
val items: List)
data class RouteItem(
…
Michael
- 187
- 1
- 2
- 7
7
votes
1 answer
Android Studio 4.1 Canary 6 issue with kapt plugin (e: java.lang.NoSuchMethodError: org.jetbrains.kotlin.codegen.state.GenerationState)
I use Android Studio 4.1 Canary 6 version and I'm try to use apply plugin: 'kotlin-kapt' plugin then I got this error during build project.
e: java.lang.NoSuchMethodError:…
code4rox
- 941
- 9
- 34
7
votes
2 answers
How can I parse Nested JSON with dynamic keys in Android kotlin, Moshi and Retrofit?
How can I parse Nested JSON with NESTED dynamic keys in Android kotlin, Moshi and Retrofit?
I get this JSON from alpha-vantage.
Format example:
{
"Meta Data": {
"1. Information": "Intraday (15min) open, high, low, close prices and…
Maor Hadad
- 1,850
- 21
- 36
7
votes
1 answer
Dark theme configuration change in Android Q
I want to implement android 10 dark theme in my app , I have these following cases:
SYSTEM_DEFAULT, NIGHT_MODE, LIGHT_MODE
The problem is when I change theme from night or light to system_default from inside the app and it can not understand whether…
Maryam Mirzaie
- 536
- 6
- 24
7
votes
1 answer
Unresolved reference when importing views from a submodule using kotlin-android-extensions
When I try to use kotlin-android-extendions' view injection in a multi-module application I get an error injecting a view from an android.library submodule:
Unresolved reference: component_xyz_user_name
We have a main app module and an…
kosiara - Bartosz Kosarzycki
- 10,922
- 12
- 70
- 83
7
votes
2 answers
I try to implement a Room Database with Androidx, I am getting error
java.lang.RuntimeException: cannot find implementation for
com.qbitstream.salesmanagementsystem.data.AppDatabase.
AppDatabase_Impl does not exist
at androidx.room.Room.getGeneratedImplementation(Room.java:94)
I have add every thing…
Sabinmon ks
- 635
- 1
- 7
- 20
7
votes
4 answers
Kotlin views with synthetic binding and nullability
I've noticed that when using Kotlin's synthetic binding, the view returned is non null (Kotlin will return View!). But this doesn't make much sense to me, since findCachedViewById can actually return null results, meaning that views can actually be…
Guy
- 6,414
- 19
- 66
- 136
7
votes
1 answer
How to access a view from layout specified in headerLayout of NavigationView using Kotlin in Android
I want to access a TextView which is included inside headerLayout of NavigationView. Is it possible to access the view using Kotlin android extension? I did using this method, but the TextView (here txtName) is always null.
Here is my…
Sandra
- 73
- 4