HarmonyOS 鸿蒙Next 如何能将某个包中resource/base/media/中自带的图片推送到远程服务器

参考如下demo：

import axios, { AxiosError, AxiosResponse, FormData } from '@ohos/axios';
import { common } from '@kit.AbilityKit';
import { BusinessError } from '@kit.BasicServicesKit';

@Entry
@Component
struct UploadFilePage {
  @State message: string = 'Hello World';
  context = this as common.UIAbilityContext

  build() {
    RelativeContainer() {
      Button(this.message)
        .id('UploadFilePageHelloWorld')
        .fontSize(50)
        .fontWeight(FontWeight.Bold)
        .alignRules({
          center: { anchor: '__container__', align: VerticalAlign.Center },
          middle: { anchor: '__container__', align: HorizontalAlign.Center }
        })
        .onClick(async () => {
          let uploadUrl = "xxxx"

          let media: Uint8Array = new Uint8Array(8)
          this.context.resourceManager.getMediaContent($r('app.media.layered_image').id, 120)
            .then((value: Uint8Array) => {
              media = value;
            })
            .catch((error: BusinessError) => {
              console.error(`promise getMediaContent failed, error code: ${error.code}, message: ${error.message}.`);
            });

          let formData = new FormData()
          formData.append('file', media.buffer)

          axios.post<string, AxiosResponse<string>, FormData>(uploadUrl, formData, {
            context: this.context,
            headers: {
              'Content-Type': 'multipart/form-data'
            },
          }).then((res: AxiosResponse) => {
            console.info("ImageUtils", "uploadPhoto", "success:" + JSON.stringify(res.data))
          }).catch((error: AxiosError) => {
            console.error("ImageUtils", "uploadPhoto", "error:" + JSON.stringify(error))
          })
        })
    }
    .height('100%')
    .width('100%')
  }
}