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

user_9022125 0
Viewed 974

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)
android-jetpack android-jetpack-compose kotlin android
2 Answers

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

user_41016650

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
user_42043400
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