HarmonyOS 列表高度不相同布局

class ListInfoItem {  
  text: ResourceStr = ""  
  subText: ResourceStr = ""  
}  
@Entry  
@Component  
struct ListExample {  
  private scrollerForList: Scroller = new Scroller()  
  private arr: Array<ListInfoItem> = [  
    {  
      text: "xxxx",  
      subText: "xxxx"  
    },  
    {  
      text: "xxxx",  
      subText: "xxxxx"  
    },  
    {  
      text: "xxxx",  
      subText: "xxxxx"  
    },  
    {  
      text: "xxxxx",  
      subText: "xxxxxx"  
    }  
  ]  
  build() {  
    Column() {  
      List({ space: 20, scroller: this.scrollerForList }) {  
        ForEach(this.arr, (item: ListInfoItem) => {  
          ListItem() {  
            Column() {  
              Text(item.text)  
                .fontSize(16)  
                .fontColor($r('sys.color.ohos_id_color_text_primary'))  
              Text(item.subText)  
                .fontSize(14)  
                .margin({ top: 8 })  
                .fontColor($r('sys.color.ohos_id_color_text_secondary'))  
            }  
            .alignItems(HorizontalAlign.Start)  
          }  
        }, (item: number) => JSON.stringify(item))  
      }  
      .padding(20)  
      .divider({  
        strokeWidth: "1px",  
        color: $r("sys.color.ohos_id_color_list_separator")  
      })  
    }  
    .height('100%')  
    .width('100%')  
    .backgroundColor($r('sys.color.ohos_id_color_sub_background'))  
  }  
}