HarmonyOS 如何实现list组件item滑动到中间高亮显示

可参考以下示例：

@Entry
@Component
struct ListExample {
  private arr: number[] = []
  private scrollerForList: Scroller = new Scroller()

  @State color: number = Color.White
  @State centerIndex : number = 0
  aboutToAppear() {
    for (let i = 0; i < 10; i++) {
      this.arr.push(i)
    }
  }

  build() {
    Column() {
      Row() {
        List({ space: 20, initialIndex: 0, scroller: this.scrollerForList }) {
          ForEach(this.arr, (item: number) => {
            ListItem() {
              Text('' + item)
                .width('100%').height(100).fontSize(16)
                .textAlign(TextAlign.Center).backgroundColor(item===this.centerIndex?Color.Pink:Color.White)
            }
            .borderRadius(10)
            .width('40%')
            .height('80%')

          }, (item: number) => JSON.stringify(item))
        }
        .chainAnimation(true)
        .edgeEffect(EdgeEffect.Spring)
        .listDirection(Axis.Horizontal)
        .height('100%')
        .width('100%')
        .scrollSnapAlign(ScrollSnapAlign.CENTER)
        .borderRadius(10)
        .backgroundColor(0xDCDCDC)
        .onScrollIndex((firstIndex: number, lastIndex: number, centerIndex: number) => {
          console.info('first' + firstIndex)
          console.info('last' + lastIndex)
          console.info('center' + centerIndex)
          this.centerIndex = centerIndex
        })
      }
      .width('100%')
      .height('100%')
      .backgroundColor(0xDCDCDC)
      .padding({ top: 10 })
    }
  }
}