Android NDK开发详解Wear之切换条状标签和时间文本

- 切换条状标签
- - 剖析
  - 用法
- 时间文本
- - 剖析
  - 用法

切换条状标签

ToggleChip
Added in 1.0.0

@Composable
fun ToggleChip(
    checked: Boolean,
    onCheckedChange: (Boolean) -> Unit,
    label: @Composable RowScope.() -> Unit,
    toggleControl: @Composable () -> Unit,
    modifier: Modifier = Modifier,
    appIcon: (@Composable BoxScope.() -> Unit)? = null,
    secondaryLabel: (@Composable RowScope.() -> Unit)? = null,
    colors: ToggleChipColors = ToggleChipDefaults.toggleChipColors(),
    enabled: Boolean = true,
    interactionSource: MutableInteractionSource = remember {
    
     MutableInteractionSource() },
    contentPadding: PaddingValues = ToggleChipDefaults.ContentPadding,
    shape: Shape = MaterialTheme.shapes.small
): Unit

A ToggleChip is a specialized type of Chip that includes a slot for a bi-state toggle control such as a radio button, toggle or checkbox.

The Wear Material ToggleChip offers four slots and a specific layout for an application icon, a label, a secondaryLabel and toggle control. The application icon and secondaryLabel are optional. The items are laid out in a row with the optional icon at the start, a column containing the two label slots in the middle and a slot for the toggle control at the end.

The ToggleChip is Stadium shaped and has a max height designed to take no more than two lines of text of Typography.button style. With localisation and/or large font sizes, the ToggleChip height adjusts to accommodate the contents. The label and secondary label should be consistently aligned.

The recommended set of ToggleChipColors can be obtained from ToggleChipDefaults, e.g. ToggleChipDefaults.toggleChipColors.

Chips can be enabled or disabled. A disabled chip will not respond to click events.

Example of a ToggleChip with an icon, label and secondary label (defaults to switch toggle):

import androidx.compose.foundation.layout.size
import androidx.compose.foundation.layout.wrapContentSize
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.ui.res.painterResource
import androidx.compose.ui.semantics.semantics
import androidx.wear.compose.material.Icon
import androidx.wear.compose.material.Switch
import androidx.wear.compose.material.Text
import androidx.wear.compose.material.ToggleChip

var checked by remember {
    
     mutableStateOf(true) }
// When we have both label and secondary label present limit both to 1 line of text
ToggleChip(
    label = {
    
    
        Text("SwitchIcon", maxLines = 1, overflow = TextOverflow.Ellipsis)
    },
    secondaryLabel = {
    
    
        Text("With secondary label", maxLines = 1, overflow = TextOverflow.Ellipsis)
    },
    checked = checked,
    // For Switch  toggle controls the Wear Material UX guidance is to set the
    // unselected toggle control color to ToggleChipDefaults.switchUncheckedIconColor()
    // rather than the default.
    colors = ToggleChipDefaults.toggleChipColors(
        uncheckedToggleControlColor = ToggleChipDefaults.SwitchUncheckedIconColor
    ),
    toggleControl = {
    
    
        Switch(
            checked = checked,
            enabled = true,
            modifier = Modifier.semantics {
    
    
                this.contentDescription =
                    if (checked) "On" else "Off"
            }
        )
    },
    onCheckedChange = {
    
     checked = it },
    appIcon = {
    
    
        Icon(
            painter = painterResource(id = R.drawable.ic_airplanemode_active_24px),
            contentDescription = "airplane",
            modifier = Modifier.size(24.dp).wrapContentSize(align = Alignment.Center),
        )
    },
    enabled = true,
)