(jetpack compose) androidx.compose.runtime.internal.ComposableLambdaImpl cannot be cast to kotlin.jvm.functions.Function0

Question

I have an BaseUi class for my custom views and my activities extends from it.
whe i using Root function , application crashed.

BaseUi.kt

@ExperimentalAnimationApi
open class BaseUi : AppCompatActivity() {

@Composable
fun RtlView(content: @Composable () -> Unit) {
    CompositionLocalProvider(
        LocalLayoutDirection provides LayoutDirection.Rtl,
        content = content
    )
}

@Composable
fun LtrView(content: @Composable () -> Unit) {
    CompositionLocalProvider(LocalLayoutDirection provides LayoutDirection.Ltr) {
        content()
    }
}

@Composable
fun Root(
    content: @Composable () -> Unit
) {
    KasbTheme {
        Box(
            Modifier
                .fillMaxSize()
                .background(LightPageBackground)
                .padding(Dimen.pagePadding)
        ){
            content()
        }
    }
}
}

SplashActivity.kt

@ExperimentalAnimationApi
class SplashActivity : BaseActivity() {

val viewModel = SplashActivityViewModel()

@ExperimentalAnimationApi
override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContent {
        InitUI()
    }
}

@ExperimentalAnimationApi
@Preview(showBackground = true)
@Composable
fun InitUI() {
    Root {
        RtlView {
            Box(Modifier.fillMaxSize()) {
                Image(
                    painter = painterResource(id = R.drawable.logo),
                    contentDescription = "",
                    modifier = Modifier.size(200.dp).align(Alignment.Center)
                )
            }
        }
    }
}
}

Runtime error

com.kasb.android E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.kasb.android, PID: 22387
    java.lang.ClassCastException: androidx.compose.runtime.internal.ComposableLambdaImpl cannot be cast to kotlin.jvm.functions.Function0
        at com.kasb.android.ui.activity.SplashActivity.InitUI(SplashActivity.kt:76)
        at com.kasb.android.ui.activity.SplashActivity$onCreate$1.invoke(SplashActivity.kt:30)
        at com.kasb.android.ui.activity.SplashActivity$onCreate$1.invoke(SplashActivity.kt:29)
        at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:107)
        at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:34)
        at androidx.compose.ui.platform.ComposeView.Content(ComposeView.android.kt:384)

Were you able to fix it?

ntoskrnl
– ntoskrnl

2021-09-30 13:04:09 +00:00
Commented Sep 30, 2021 at 13:04 — ntoskrnl
– ntoskrnl, Commented Sep 30, 2021 at 13:04

YueMuc · Accepted Answer · 2022-02-03 08:53:05Z

5

not a permanent fix, but clean project gets rid of the error for one compile. Don't know why it's happening though.

answered Feb 3, 2022 at 8:53

YueMuc

941 silver badge6 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Sven Over a year ago

did you find a workarround to avoid the cleaning of the project?

YueMuc Over a year ago

I don't think so, we moved on to a new project so I don't remember, but it doesn't happen in our new project at all. So maybe update all libraries and the IDE.

Maciej Przybylski · Accepted Answer · 2022-08-23 08:57:12Z

2

I had same error, and problem was caused that I was calling function form subtype of the class where it was defined

    BaseActivity{
     fun displayAlertDialog(content: @Composable() () -> Unit) {
        bottomDialog.show(supportFragmentManager, "bottom-dialog")
        bottomDialog.setContent(content)
    }
            @Composable
            fun Screen(
                activity: BaseActivity,
            ) {
            activity.displayAlertDialog{} 
            }
        
        // works fine
        //if activity is subtype of BaseActivity it throws that error

answered Aug 23, 2022 at 8:57

Maciej Przybylski

4413 silver badges12 bronze badges

2 Comments

Breimer Over a year ago

Does this mean comose doesn't work well with inheritance? I've been experiencing this and don't know how to solve it if the inheritance is required.

Bawender Yandra Over a year ago

I have the same issue where inheritance is causing a problem. But in my case, it was two levels up. Basically, a Grandfather class (GrandFather -> Father -> Child) had a function that I could not access in the child class. If the function was in the Father class, it worked fine. Extension functions work well, though, in this case, so I move my functions to be extension functions with composable blocks as parameters.

Super Kai - Kazuya Ito · Accepted Answer · 2023-06-13 07:12:43Z

0

simple way, you just put the composable function into Class delegate,

writer.writeLine(${binding}.${handleMethod}(${IssueFixClass::class.simpleName}.${IssueFixClass.Delegate::makeClass.name}(contentListBlock$timestamp)))

result like this

binding.handleUIGroupCreator( IssueFixClass.makeClass(content64966723696806))

my kmm androidMain

actual class IssueFixClass private actual constructor(val content:@Composable @UiComposable ()->Unit){
    @Composable
    @UiComposable
    actual fun invoke(){
        content.invoke()
    }
    actual companion object Delegate{
        actual fun makeClass(content: @Composable @UiComposable () -> Unit):IssueFixClass{
          return  IssueFixClass(content)
        }
    }
}

edited Jun 13, 2023 at 7:12

Super Kai - Kazuya Ito

42.8k23 gold badges259 silver badges257 bronze badges

answered Jun 12, 2023 at 16:10

vicky leu

875 bronze badges

Collectives™ on Stack Overflow

(jetpack compose) androidx.compose.runtime.internal.ComposableLambdaImpl cannot be cast to kotlin.jvm.functions.Function0

3 Answers 3

2 Comments

2 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

2 Comments

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related