harmony 鸿蒙Badge

2022-08-09
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Badge

The <Badge> component is a container that can be attached to another component for tagging.

NOTE

This component is supported since API version 7. Updates will be marked with a superscript to indicate their earliest API version.

Child Components

This component supports only one child component.

NOTE

Built-in components and custom components are allowed, with support for (if/else, ForEach, and LazyForEach) rendering control.

APIs

Badge

Badge(value: {count: number, position?: BadgePosition |Position, maxCount?: number, style: BadgeStyle})

Creates a badge.

Since API version 9, this API is supported in ArkTS widgets.

Parameters

Name	Type	Mandatory	Description
count	number	Yes	Number of notifications. NOTE If the value is less than or equal to 0, no badge is displayed. Value range: [-2147483648, 2147483647] If the value is not an integer, it is rounded off to the nearest integer. For example, 5.5 is rounded off to 5.
position	BadgePosition\|Position¹⁰⁺	No	Position to display the badge relative to the parent component. Default value: BadgePosition.RightTop NOTE This parameter cannot be set in percentage. If it is set to an invalid value, the default value (0,0) will be used.
maxCount	number	No	Maximum number of notifications. When the maximum number is reached, only maxCount+ is displayed. Default value: 99 Value range: [-2147483648, 2147483647] If the value is not an integer, it is rounded off to the nearest integer. For example, 5.5 is rounded off to 5.
style	BadgeStyle	Yes	Style of the badge, including the font color, font size, badge color, and badge size.

Badge

Badge(value: {value: string, position?: BadgePosition |Position, style: BadgeStyle})

Creates a badge based on the given string.

Since API version 9, this API is supported in ArkTS widgets.

Parameters

Name	Type	Mandatory	Default Value	Description
value	string	Yes	-	Prompt content.
position	BadgePosition\|Position¹⁰⁺	No	BadgePosition.RightTop	Position to display the badge relative to the parent component.
style	BadgeStyle	Yes	-	Style of the badge, including the font color, font size, badge color, and badge size.

BadgePosition

Since API version 9, this API is supported in ArkTS widgets.

Name	Description
RightTop	The badge is displayed in the upper right corner of the parent component.
Right	The badge is vertically centered on the right of the parent component.
Left	The badge is vertically centered on the left of the parent component.

BadgeStyle

Since API version 9, this API is supported in ArkTS widgets.

Name	Type	Mandatory	Description
color	ResourceColor	No	Font color. Default value: Color.White
fontSize	number \|string	No	Font size. Default value: 10 Unit: vp NOTE This parameter cannot be set in percentage.
badgeSize	number \|string	No	Badge size. Default value: 16 Unit: vp NOTE This parameter cannot be set in percentage. If it is set to an invalid value, the default value is used.
badgeColor	ResourceColor	No	Badge color. Default value: Color.Red
fontWeight¹⁰⁺	number \|FontWeight \|string	No	Font weight of the text. Default value: FontWeight.Normal NOTE This parameter cannot be set in percentage.
borderColor¹⁰⁺	ResourceColor	No	Border color of the background.
borderWidth¹⁰⁺	Length	No	Border width of the background. Default value: 1 Unit: vp NOTE This parameter cannot be set in percentage.

Attributes

The universal attributes are supported.

Events

The universal events are supported.

Example

// xxx.ets
@Entry
@Component
struct BadgeExample {
  @Builder TabBuilder(index: number) {
    Column() {
      if (index === 2) {
        Badge({
          value: '',
          style: { badgeSize: 6, badgeColor: '#FA2A2D' }
        }) {
          Image('/common/public_icon_off.svg')
            .width(24)
            .height(24)
        }
        .width(24)
        .height(24)
        .margin({ bottom: 4 })
      } else {
        Image('/common/public_icon_off.svg')
          .width(24)
          .height(24)
          .margin({ bottom: 4 })
      }
      Text('Tab')
        .fontColor('#182431')
        .fontSize(10)
        .fontWeight(500)
        .lineHeight(14)
    }.width('100%').height('100%').justifyContent(FlexAlign.Center)
  }

  @Builder itemBuilder(value: string) {
    Row() {
      Image('common/public_icon.svg').width(32).height(32).opacity(0.6)
      Text(value)
        .width(177)
        .height(21)
        .margin({ left: 15, right: 76 })
        .textAlign(TextAlign.Start)
        .fontColor('#182431')
        .fontWeight(500)
        .fontSize(16)
        .opacity(0.9)
      Image('common/public_icon_arrow_right.svg').width(12).height(24).opacity(0.6)
    }.width('100%').padding({ left: 12, right: 12 }).height(56)
  }

  build() {
    Column() {
      Text('dotsBadge').fontSize(18).fontColor('#182431').fontWeight(500).margin(24)
      Tabs() {
        TabContent()
          .tabBar(this.TabBuilder(0))
        TabContent()
          .tabBar(this.TabBuilder(1))
        TabContent()
          .tabBar(this.TabBuilder(2))
        TabContent()
          .tabBar(this.TabBuilder(3))
      }
      .width(360)
      .height(56)
      .backgroundColor('#F1F3F5')

      Column() {
        Text('stringBadge').fontSize(18).fontColor('#182431').fontWeight(500).margin(24)
        List({ space: 12 }) {
          ListItem() {
            Text('list1').fontSize(14).fontColor('#182431').margin({ left: 12 })
          }
          .width('100%')
          .height(56)
          .backgroundColor('#FFFFFF')
          .borderRadius(24)
          .align(Alignment.Start)

          ListItem() {
            Badge({
              value: 'New',
              position: BadgePosition.Right,
              style: { badgeSize: 16, badgeColor: '#FA2A2D' }
            }) {
              Text('list2').width(27).height(19).fontSize(14).fontColor('#182431')
            }.width(49.5).height(19)
            .margin({ left: 12 })
          }
          .width('100%')
          .height(56)
          .backgroundColor('#FFFFFF')
          .borderRadius(24)
          .align(Alignment.Start)
        }.width(336)

        Text('numberBadge').fontSize(18).fontColor('#182431').fontWeight(500).margin(24)
        List() {
          ListItem() {
            this.itemBuilder('list1')
          }

          ListItem() {
            Row() {
              Image('common/public_icon.svg').width(32).height(32).opacity(0.6)
              Badge({
                count: 1,
                position: BadgePosition.Right,
                style: { badgeSize: 16, badgeColor: '#FA2A2D' }
              }) {
                Text('list2')
                  .width(177)
                  .height(21)
                  .textAlign(TextAlign.Start)
                  .fontColor('#182431')
                  .fontWeight(500)
                  .fontSize(16)
                  .opacity(0.9)
              }.width(240).height(21).margin({ left: 15, right: 11 })

              Image('common/public_icon_arrow_right.svg').width(12).height(24).opacity(0.6)
            }.width('100%').padding({ left: 12, right: 12 }).height(56)
          }

          ListItem() {
            this.itemBuilder('list3')
          }

          ListItem() {
            this.itemBuilder('list4')
          }
        }
        .width(336)
        .height(232)
        .backgroundColor('#FFFFFF')
        .borderRadius(24)
        .padding({ top: 4, bottom: 4 })
        .divider({ strokeWidth: 0.5, color: 'rgba(0,0,0,0.1)', startMargin: 60, endMargin: 12 })
      }.width('100%').backgroundColor('#F1F3F5').padding({ bottom: 12 })
    }.width('100%')
  }
}

badge