gpeal

val progress by animateLottieCompositionAsState(
    composition,
    iterations = LottieConstants.IterateForever,
)

gpeal

val composition by rememberLottieComposition(LottieCompositionSpec.RawRes(R.raw.heart))

gpeal

data class Person(val age: Int? = null)

val people = listOf(
  Person(5),
  Person(null),
)

// Before/Your Dart example equivalent:
val firstAge = people.first { it.age != null }.age
// firstAge is of type Int? even though logically you know that it's Int.

gpeal

context.registerReceiverInScope(scope, WifiManager.WIFI_STATE_CHANGED_ACTION) { intent ->
    val state = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, WifiManager.WIFI_STATE_DISABLED)
    // Use wifi state here
}

gpeal

class Label @JvmOverloads constructor(
    context: Context,
    attrs: AttributeSet? = null,
    defStyleAttr: Int = 0
) : FrameLayout(context, attrs, defStyleAttr) {
    var inverted by uniqueObservable(false) { refreshDrawableState() }
    ...
}

gpeal

/**
 * Like Delegates.observable except it only calls the callback when the value actually changes.
 */
public inline fun <T> uniqueObservable(initialValue: T, emitInitial: Boolean = false, crossinline onChange: (value: T) -> Unit): ReadWriteProperty<Any?, T> {
    if (emitInitial) onChange(initialValue)
    return object : ObservableProperty<T>(initialValue) {
        override fun afterChange(property: KProperty<*>, oldValue: T, newValue: T) {
            if (oldValue != newValue) onChange(newValue)
        }
    }

gpeal

@Composable
fun MyComposable() {
    val viewModel: MyViewModel = mavericksViewModel()
    val state by viewModel.collectAsState()
    AnotherComposable(
      state.value,
      onClick = viewModel.onClick()
    )
}

gpeal

// Will fade myView in or out.
// You can call this repeatedly with the same value and it won't interrupt the ongoing animation.
myView.fadeTo(true)
myView.fadeTo(false)
myView.fadeTo(true, toAlpha = 0.8f)
myView.fadeTo(true, startDelay = 300)
myView.fadeTo(true, duration = 500)

gpeal

recyclerView.updatePadding(top = 14.dp.toInt())

gpeal

/**
 * Call this function on a dp value and it will return the equivalent
 * number of pixels for the current display.
 * e.g. 8.dp
 */
val Number.dp get() = toFloat() * (Resources.getSystem().displayMetrics.densityDpi.toFloat() / DisplayMetrics.DENSITY_DEFAULT)