Flutter HarmonyOS如何将图片设置为启动图？

import { router } from '@kit.ArkUI'; 
 
@Entry 
@Component 
struct Index { 
  private  timeOutId:number = 0 
  aboutToAppear() { 
    this.timeOutId = setTimeout(() => { 
      // router.replaceUrl({ url: "pages/MainViewPage" }) 
      //   .catch((err: Error) => { 
      // 
      //   }) 
    }, 3000); 
  } 
 
  aboutToDisappear() { 
    clearTimeout(this.timeOutId); 
  } 
 
  build() { 
 
    Row() { 
      Column() { 
        Stack(){ 
 
          Column(){ 
            Image($r("app.media.ic_title")) 
              .backgroundColor(Color.Red) 
              .width(456/5) 
              .margin({ 
                bottom:5 
              }) 
            Text("text") 
              .fontSize(12) 
          } 
          .justifyContent(FlexAlign.End) 
          .height("80%") 
        } 
 
      } 
      .width("100%") 
    } 
    .height("100%") 
  } 
}