LoadingIndicator

Component in Material 3 Compose

A Material Design loading indicator.

This version of the loading indicator morphs between its [polygons] shapes by the value of its [progress].

Last updated: 2024-10-22 13:47

Installation

dependencies {
   implementation("androidx.compose.material3:material3:1.4.0-alpha02")
}

Overloads

@ExperimentalMaterial3ExpressiveApi
@Composable
fun LoadingIndicator(
    progress: () -> Float,
    modifier: Modifier = Modifier,
    color: Color = LoadingIndicatorDefaults.indicatorColor,
    polygons: List<RoundedPolygon> = LoadingIndicatorDefaults.DeterminateIndicatorPolygons
)

Parameters

name	description
progress	the progress of this loading indicator, where 0.0 represents no progress and 1.0 represents full progress. Values outside of this range are coerced into the range. The indicator will morph its shapes between the provided [polygons] according to the value of the progress.
modifier	the [Modifier] to be applied to this loading indicator
color	the loading indicator's color
polygons	a list of [RoundedPolygon]s for the sequence of shapes this loading indicator will morph between as it progresses from 0.0 to 1.0. The loading indicator expects at least two items in that list.

@ExperimentalMaterial3ExpressiveApi
@Composable
fun LoadingIndicator(
    modifier: Modifier = Modifier,
    color: Color = LoadingIndicatorDefaults.indicatorColor,
    polygons: List<RoundedPolygon> = LoadingIndicatorDefaults.IndeterminateIndicatorPolygons,
)

Parameters

name	description
modifier	the [Modifier] to be applied to this loading indicator
color	the loading indicator's color
polygons	a list of [RoundedPolygon]s for the sequence of shapes this loading indicator will morph between. The loading indicator expects at least two items in that list.

Code Examples

DeterminateLoadingIndicatorSample

@OptIn(ExperimentalMaterial3ExpressiveApi::class)
@Preview
@Composable
fun DeterminateLoadingIndicatorSample() {
    var progress by remember { mutableFloatStateOf(0f) }
    val animatedProgress by
        animateFloatAsState(
            targetValue = progress,
            animationSpec =
                spring(
                    dampingRatio = Spring.DampingRatioNoBouncy,
                    stiffness = Spring.StiffnessVeryLow,
                    visibilityThreshold = 1 / 1000f
                )
        )

    Column(horizontalAlignment = Alignment.CenterHorizontally) {
        LoadingIndicator(progress = { animatedProgress })
        Spacer(Modifier.requiredHeight(30.dp))
        Text("Set loading progress:")
        Slider(
            modifier = Modifier.width(300.dp),
            value = progress,
            valueRange = 0f..1f,
            onValueChange = { progress = it },
        )
    }
}

LoadingIndicatorSample

@OptIn(ExperimentalMaterial3ExpressiveApi::class)
@Preview
@Composable
fun LoadingIndicatorSample() {
    Column(horizontalAlignment = Alignment.CenterHorizontally) { LoadingIndicator() }
}