HarmonyOS app模块拆分，图标在A模块，A模块绘制绘制不出来，但A不是根模块

private settings: RenderingContextSettings = new RenderingContextSettings(true) 
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) 
private img:ImageBitmap = new ImageBitmap("resources/base/media/icon.png") 
Canvas(this.context) 
  .width('50%') 
  .height('50%') 
  .onReady(() =>{ 
    this.context.drawImage( this.img,10, 10 , 20, 20) 
  })

// library模块 Index.ets 
import { image } from '@kit.ImageKit'; 
@Entry 
@Component 
export struct Index { 
  private settings: RenderingContextSettings = new RenderingContextSettings(true) 
  private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) 
  @State imgPixelMap: PixelMap | null = null 
  async aboutToAppear() { 
    let imageBuffer: Uint8Array = await getContext().createModuleContext('library').resourceManager.getMediaContent($r('app.media.gg_djgcw')) 
    const imageSource : image.ImageSource = image.createImageSource(imageBuffer.buffer); 
    imageSource.createPixelMap().then((pixelMap: PixelMap) => { 
      this.imgPixelMap = pixelMap 
      this.context.drawImage(this.imgPixelMap,10, 10 , 20, 20) 
    }) 
  } 
  build() { 
    Row() { 
      Column() { 
        Canvas(this.context) 
          .width('50%') 
          .height('50%') 
      } 
      .width('100%') 
    } 
    .height('100%') 
  } 
}