Background

You can set the background of a component.

NOTE

The APIs of this module are supported since API version 7. Updates will be marked with a superscript to indicate their earliest API version.

Attributes

Name Type Description
backgroundColor ResourceColor Background color of the component.
backgroundImage src: ResourceStr,
repeat?: ImageRepeat		 src: image address, which can be the address of an Internet or a local image. (SVG images are not supported.)
repeat: whether the background image is repeatedly used. By default, the background image is not repeatedly used.
backgroundImageSize {
width?: Length,
height?: Length
} | ImageSize		 Width and height of the background image. If the input is a {width: Length, height: Length} object and only one attribute is set, the other attribute is the set value multiplied by the original aspect ratio of the image. By default, the original image aspect ratio remains unchanged.
Default value: ImageSize.Auto
backgroundImagePosition Position | Alignment Position of the background image in the component.
Default value:
{
x: 0,
y: 0
}
When x and y are set in percentage, the offset is calculated based on the width and height of the component.

Example

// xxx.ets
@Entry
@Component
struct BackgroundExample {

  build() {
    Column({ space: 5 }) {
      Text('background color').fontSize(9).width('90%').fontColor(0xCCCCCC)
      Row().width('90%').height(50).backgroundColor(0xE5E5E5).border({ width: 1 })

      Text('background image repeat along X').fontSize(9).width('90%').fontColor(0xCCCCCC)
      Row()
        .backgroundImage('/comment/bg.jpg', ImageRepeat.X)
        .backgroundImageSize({ width: '250px', height: '140px' })
        .width('90%')
        .height(70)
        .border({ width: 1 })

      Text('background image repeat along Y').fontSize(9).width('90%').fontColor(0xCCCCCC)
      Row()
        .backgroundImage('/comment/bg.jpg', ImageRepeat.Y)
        .backgroundImageSize({ width: '500px', height: '120px' })
        .width('90%')
        .height(100)
        .border({ width: 1 })

      Text('background image size').fontSize(9).width('90%').fontColor(0xCCCCCC)
      Row()
        .width('90%').height(150)
        .backgroundImage('/comment/bg.jpg', ImageRepeat.NoRepeat)
        .backgroundImageSize({ width: 1000, height: 500 })
        .border({ width: 1 })

      Text('background fill the box(Cover)').fontSize(9).width('90%').fontColor(0xCCCCCC)
      // Occupy all the space of the container, without ensuring that the image is completely displayed.
      Row()
        .width(200)
        .height(50)
        .backgroundImage('/comment/bg.jpg', ImageRepeat.NoRepeat)
        .backgroundImageSize(ImageSize.Cover)
        .border({ width: 1 })

      Text('background fill the box(Contain)').fontSize(9).width('90%').fontColor(0xCCCCCC)
      // Maximize the image while ensuring that it can be completely displayed.
      Row()
        .width(200)
        .height(50)
        .backgroundImage('/comment/bg.jpg', ImageRepeat.NoRepeat)
        .backgroundImageSize(ImageSize.Contain)
        .border({ width: 1 })

      Text('background image position').fontSize(9).width('90%').fontColor(0xCCCCCC)
      Row()
        .width(100)
        .height(50)
        .backgroundImage('/comment/bg.jpg', ImageRepeat.NoRepeat)
        .backgroundImageSize({ width: 1000, height: 560 })
        .backgroundImagePosition({ x: -500, y: -300 })
        .border({ width: 1 })
    }
    .width('100%').height('100%').padding({ top: 5 })
  }
}

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