HarmonyOS 鸿蒙Next中List或者Grid只有一列的时候，ITEM之间的间隔修改不了吗？

您好，您可以尝试在每个ListItem内的组件设置margin，来实现间距效果；

例如：

// ListDataSource.ets
export class ListDataSource implements IDataSource {
  private list: number[] = [];
  private listeners: DataChangeListener[] = [];

  constructor(list: number[]) {
    this.list = list;
  }

  totalCount(): number {
    return this.list.length;
  }

  getData(index: number): number {
    return this.list[index];
  }

  registerDataChangeListener(listener: DataChangeListener): void {
    if (this.listeners.indexOf(listener) < 0) {
      this.listeners.push(listener);
    }
  }

  unregisterDataChangeListener(listener: DataChangeListener): void {
    const pos = this.listeners.indexOf(listener);
    if (pos >= 0) {
      this.listeners.splice(pos, 1);
    }
  }

  // 通知控制器数据删除
  notifyDataDelete(index: number): void {
    this.listeners.forEach(listener => {
      listener.onDataDelete(index);
    });
  }

  // 通知控制器添加数据
  notifyDataAdd(index: number): void {
    this.listeners.forEach(listener => {
      listener.onDataAdd(index);
    });
  }

  // 在指定索引位置删除一个元素
  public deleteItem(index: number): void {
    this.list.splice(index, 1);
    this.notifyDataDelete(index);
  }

  // 在指定索引位置插入一个元素
  public insertItem(index: number, data: number): void {
    this.list.splice(index, 0, data);
    this.notifyDataAdd(index);
  }
}

// xxx.ets
import { ListDataSource } from './ListDataSource';

@Entry
@Component
struct ListExample {
  private arr: ListDataSource = new ListDataSource([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);

  build() {
    Column() {
      List({ space: 20, initialIndex: 0 }) {
        LazyForEach(this.arr, (item: number) => {
          ListItem() {
            Text('' + item)
              .width('100%').height(100).fontSize(16)
              .textAlign(TextAlign.Center).borderRadius(10).backgroundColor(0xFFFFFF)
              .margin(20) // 设置间距
          }
        }, (item: number) => item.toString())
      }
      .listDirection(Axis.Vertical) // 排列方向
      .scrollBar(BarState.Off)
      .friction(0.6)
      .divider({ strokeWidth: 2, color: 0xFFFFFF, startMargin: 20, endMargin: 20 }) // 每行之间的分界线
      .edgeEffect(EdgeEffect.Spring) // 边缘效果设置为Spring
      .onScrollIndex((firstIndex: number, lastIndex: number, centerIndex: number) => {
        console.info('first' + firstIndex);
        console.info('last' + lastIndex);
        console.info('center' + centerIndex);
      })
      .onScrollVisibleContentChange((start: VisibleListContentInfo, end: VisibleListContentInfo) => {
        console.info(' start index: ' + start.index +
                    ' start item group area: ' + start.itemGroupArea +
                    ' start index in group: ' + start.itemIndexInGroup);
        console.info(' end index: ' + end.index +
                    ' end item group area: ' + end.itemGroupArea +
                    ' end index in group: ' + end.itemIndexInGroup);
      })
      .onDidScroll((scrollOffset: number, scrollState: ScrollState) => {
        console.info(`onScroll scrollState = ScrollState` + scrollState + `, scrollOffset = ` + scrollOffset);
      })
      .width('90%')
    }
    .width('100%')
    .height('100%')
    .backgroundColor(0xDCDCDC)
    .padding({ top: 5 })
  }
}