HarmonyOS 如何使用http请求数据，再用LazyForEach加载到页面上

参考示例如下：

@Entry
@Component
struct Index {
  @State index: number = 0;
  @State timer: number = 0;
  @State text: string = "";
  @State arrtext: Array<string> = [];
  content: string =
    "xxx"

  aboutToAppear() {
    this.arrtext = this.content.split("")
    this.timer = setInterval(() => {
      let item = this.arrtext[this.index]
      this.text = this.text + item
      this.index++
      if (this.index >= this.arrtext.length) {
        clearInterval(this.timer)
      }
    }, 200)
  }

  build() {
    Column() {
      Row() {
        Text(this.text).fontSize(20)
      }.margin({ left: 10, right: 10 })

    }.width('100%')
    .alignItems(HorizontalAlign.Start)
    .layoutWeight(1)
  }
}