derivedStateOf

by

=

derivedStateOf

class SignUpScreenViewState {
  var email by mutableStateOf("")
  var password by mutableStateOf("")
  var acceptTerms by mutableStateOf(false)
  var canMakeSignUpCall = derivedStateOf { email.isNotEmpty() && password.isNotEmpty() && acceptTerms }
}

Button

elevation

contentPadding

Button(
        modifier = modifier
            .size(46.dp)
            .padding(0.dp).background(Color.Green),
        elevation = ButtonDefaults.buttonElevation(
            // all zero
        ),
        shape = RoundedCornerShape(13.dp),
        contentPadding = PaddingValues(0.dp)
    ) {
        Icon(
            painter = iconPainter,
            contentDescription = contentDescription,
            modifier = Modifier.size(20.dp)
        )
    }

java.lang.IllegalArgumentException

No destination with route "A" is on the NavController's back stack. The current destination is a route ="B"

public fun getBackStackEntry(route: String): NavBackStackEntry

composable("A"){
 ScreenA(hiltViewModel(it)
}

composable("B){
 val parentNavBackStack = remember { navController.getBackStackEntry("A") }
 ScreenB (hiltViewModel(parentNavBackStackEntry))
}

1. Huawei Mate 20 lite Android 10
2. Realme 7 Pro Android 11

Column

AnimatedContent

ContentTransform

drawArc

MyTextField(
    text = vm.state.email,
    onTextChange = vm::emailChange,
...
}

emailChange(text: String)

MyTextField(
    text = vm.state.email,
    onTextChange = {vm.state.email = it},

ExpandedDropdownMenuDefaults.TrailingIcon

OutlinedTextField

IllegalStateException: Compose Runtime internal error. Unexpected or incorrect use of the Compose internal runtime API (Use active SlotWriter to determine anchor location instead)

compose-compiler:1.2.0-dev-k1.6.20-61e81dadb1c

AnimatedNavHost

Safe Flow collection in Jetpack Compose

@Composable
fun LocationScreen(locationFlow: Flow<Flow>) {

    val lifecycleOwner = LocalLifecycleOwner.current
    val locationFlowLifecycleAware = remember(locationFlow, lifecycleOwner) {
        locationFlow.flowWithLifecycle(lifecycleOwner.lifecycle, Lifecycle.State.STARTED)
    }

    val location by locationFlowLifecycleAware.collectAsState()

    // Current location, do something with it
}

Composables

assets/dexopt/baseline.prof

assets/dexopt/baseline.prof

fun create (lifecycleOwner: LifecycleOwner, view: View) {

    val toast = Toast(context)

    val toastCustomView = ToastCustomView(
        context
    )

    toast.view = toastCustomView
    toast.show()
}

Any help?

windowSoftInputMode="adjustResize"

adjustResize

enum class ClothingTypes(val clothingLabel:String) {
    BLAZER("blazer"),
    BLOUSE("blouse"),
    BODY("body");

    companion object {
        fun getNumberOfItems() = values().size
    }
}

var selectedIndex by remember { mutableStateOf(MutableList(ClothingTypes.getNumberOfItems()) { 0 }) }
val checkedState = remember { mutableStateOf(MutableList(ClothingTypes.getNumberOfItems()) { false }) }
Column {
    DropdownMenu(
        expanded = expanded,
        onDismissRequest = { expanded = false },
        modifier = Modifier.background(Color.LightGray)
    ) {
        ClothingTypes.values().forEachIndexed { index, s ->
            DropdownMenuItem(onClick = {
                selectedIndex[index] = index
                expanded = true
            }) {
                Switch(
                    checked = checkedState.value[index],
                    onCheckedChange = { checkedState.value[index] = it }
                )
                Text(text = s.clothingLabel)
            }
        }
    }
    Text(text = "outfit view", style = MaterialTheme.typography.h6)
}

FocusManager.moveFocus(FocusDirection.Down)

java.lang.IllegalArgumentException: Only VectorDrawables and rasterized asset types are supported ex. PNG, JPG

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="<http://schemas.android.com/apk/res/android>" android:shape="oval">
    <solid android:color="#F44336"/>

</shape>

Image(
    imageVector =   ImageVector.vectorResource(
        id = R.drawable.ball
    ),
    contentDescription = null
)

val lits1 = listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
val list2 = listOf("one", "two", "three", "four", "five")
LazyRow {
    // first
    itemsIndexed(items = lits1) { _, item ->
        Text(text = "$item")
    }

    // second
    itemsIndexed(items = list2) { _, item ->
        Text(text = item, modifier = Modifier.background(Green))
    }
}

list2

second

itemsIndexed