Checkbox

Composable Component

Checkboxes allow users to select one or more items from a set. Checkboxes can turn an option on or off.

Common

@Composable
fun Checkbox(
    checked: Boolean,
    onCheckedChange: ((Boolean) -> Unit)?,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    colors: CheckboxColors = CheckboxDefaults.colors(),
    interactionSource: MutableInteractionSource? = null,
)

Parameters


checked	whether this checkbox is checked or unchecked
onCheckedChange	called when this checkbox is clicked. If `null`, then this checkbox will not be interactable, unless something else handles its input events and updates its state.
modifier	the `Modifier` to be applied to this checkbox
enabled	controls the enabled state of this checkbox. When `false`, this component will not respond to user input, and it will appear visually disabled and disabled to accessibility services.
colors	`CheckboxColors` that will be used to resolve the colors used for this checkbox in different states. See `CheckboxDefaults.colors`.
interactionSource	an optional hoisted `MutableInteractionSource` for observing and emitting `Interaction`s for this checkbox. You can use this to change the checkbox's appearance or preview the checkbox in different states. Note that if `null` is provided, interactions will still happen internally.

Common

@Composable
fun Checkbox(
    checked: Boolean,
    onCheckedChange: ((Boolean) -> Unit)?,
    checkmarkStroke: Stroke,
    outlineStroke: Stroke,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    colors: CheckboxColors = CheckboxDefaults.colors(),
    interactionSource: MutableInteractionSource? = null,
)

Parameters


checked	whether this checkbox is checked or unchecked
onCheckedChange	called when this checkbox is clicked. If `null`, then this checkbox will not be interactable, unless something else handles its input events and updates its state.
checkmarkStroke	stroke for the checkmark.
outlineStroke	stroke for the checkmark's box outline. Note that this stroke is applied when drawing the outline's rounded rectangle, so attributions such as `androidx.compose.ui.graphics.StrokeJoin` will be ignored.
modifier	the `Modifier` to be applied to this checkbox
enabled	controls the enabled state of this checkbox. When `false`, this component will not respond to user input, and it will appear visually disabled and disabled to accessibility services.
colors	`CheckboxColors` that will be used to resolve the colors used for this checkbox in different states. See `CheckboxDefaults.colors`.
interactionSource	an optional hoisted `MutableInteractionSource` for observing and emitting `Interaction`s for this checkbox. You can use this to change the checkbox's appearance or preview the checkbox in different states. Note that if `null` is provided, interactions will still happen internally.

Code Examples

CheckboxRoundedStrokesSample

@Preview
@Composable
fun CheckboxRoundedStrokesSample() {
    val strokeWidthPx = with(LocalDensity.current) { floor(CheckboxDefaults.StrokeWidth.toPx()) }
    val checkmarkStroke =
        remember(strokeWidthPx) {
            Stroke(width = strokeWidthPx, cap = StrokeCap.Round, join = StrokeJoin.Round)
        }
    val outlineStroke = remember(strokeWidthPx) { Stroke(width = strokeWidthPx) }
    val checkedState = remember { mutableStateOf(true) }
    Checkbox(
        checked = checkedState.value,
        onCheckedChange = { checkedState.value = it },
        checkmarkStroke = checkmarkStroke,
        outlineStroke = outlineStroke,
    )
}

CheckboxSample

@Preview
@Composable
fun CheckboxSample() {
    val checkedState = remember { mutableStateOf(true) }
    Checkbox(checked = checkedState.value, onCheckedChange = { checkedState.value = it })
}

CheckboxWithTextSample

@Preview
@Composable
fun CheckboxWithTextSample() {
    val (checkedState, onStateChange) = remember { mutableStateOf(true) }
    Row(
        Modifier.fillMaxWidth()
            .height(56.dp)
            .toggleable(
                value = checkedState,
                onValueChange = { onStateChange(!checkedState) },
                role = Role.Checkbox,
            )
            .padding(horizontal = 16.dp),
        verticalAlignment = Alignment.CenterVertically,
    ) {
        Checkbox(
            checked = checkedState,
            onCheckedChange = null, // null recommended for accessibility with screenreaders
        )
        Text(
            text = "Option selection",
            style = MaterialTheme.typography.bodyLarge,
            modifier = Modifier.padding(start = 16.dp),
        )
    }
}

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