HarmonyOS 自定义组件如何引用media资源文件夹下的图片转化成ImageBitmap？

getContext(this).resourceManager.getMediaContent($r("app.media.img1")).then( 
  (data) => { 
    let arrayBuffer = data.buffer.slice(data.byteOffset, data.byteLength + data.byteOffset) 
    let imageSource: image.ImageSource = image.createImageSource(arrayBuffer); 
    let value: image.ImageInfo = {size:{height:0, width:0},density:0,stride:0}; 
    imageSource.getImageInfo( (err, val) => { if (err) { return; } value = val }); 
    let opts: image.DecodingOptions = { editable: true, desiredSize: { height: value.size.height, width: value.size.width }}; 
    imageSource.createPixelMap(opts, (err, pixelMap) => { 
      let img = new ImageBitmap(pixelMap) 
      // do something 
    }) 
  } 
)