HarmonyOS 无法调用系统相机获取拍照图片

参考下demo：

import { common, Want } from '@kit.AbilityKit';
@Entry
@Component
struct Index {
  context =  getContext(this) as common.UIAbilityContext
  build() {
    Row() {
      Column() {
        Button("拉起相机").onClick(() => {
          let wantInfo: Want = {
            'action': 'ohos.want.action.imageCapture',
            parameters: {
              callBundleName: "com.example.camerademo"
            }
          }
          this.context.startAbilityForResult(wantInfo, (err, data) => {
            console.debug("信息为：" + JSON.stringify(data))
          })
        })
      }
      .width('100%')
    }
    .height('100%')
  }
}