HarmonyOS 鸿蒙Next如何从一个网络图片获取其主题色？

import http from '[@ohos](/user/ohos).net.http';
import ResponseCode from '[@ohos](/user/ohos).net.http';
import effectKit from '[@ohos](/user/ohos).effectKit';
import image from '[@ohos](/user/ohos).multimedia.image';

[@Entry](/user/Entry)
[@Component](/user/Component)
struct Index {
  async getInverseColor(imageUrl: string): Promise<string> {
    let colorPicker: effectKit.ColorPicker | null = await this.getImageColor(imageUrl);
    let color = colorPicker!.getMainColorSync();
    // 将取色器选取的color示例转换为十六进制颜色代码
    let bgColor =
      "#" + color.alpha.toString(16) + color.red.toString(16) + color.green.toString(16) + color.blue.toString(16)
    return bgColor
  }

  async getImageColor(imageUrl: string): Promise<effectKit.ColorPicker | null> {
    const data: http.HttpResponse = await http.createHttp().request(imageUrl)
    let code: number = data.responseCode;
    if (ResponseCode.ResponseCode.OK === code) {
      let imageSource = image.createImageSource(data.result as string);
      console.time('get color time')
      const pixelMap: image.PixelMap = await imageSource.createPixelMap();
      const colorPicker: effectKit.ColorPicker = await effectKit.createColorPicker(pixelMap);
      return colorPicker;
    }
    return null;
  }

  build() {
    Column() {
      Button('获取图片主题色')
        .onClick(async () => {
          let colorInfo: string = await this.getInverseColor('图片链接');
          console.log("颜色：", colorInfo)
        })
    }
    .width('100%')
    .height('100%')
  }
}

可以参考下这个代码