HarmonyOS 关于使用getRawFileContentSync提示Rawfile path is invalid的问题

关于使用getRawFileContentSync提示Rawfile path is invalid的问题，从官方文档中无法定位出是路径给错了还是使用的方式不对。

错误日志：

07-19 11:37:22.088   13435-13435  C01e00/ResourceManagerJs   E     Failed to get rawfile by city_code.json 
07-19 11:37:22.088   13435-13435  A0ff00/[QZD]     E     CityCodeHelper, getRawFileContentSync failed, error code: 9001005, message: Rawfile path is invalid.
1.
2.

具体代码如下：

import { JSON, util } from '@kit.ArkTS'
import { CityCodeBean } from '../bean/CityCodeBean';
import { CityCodeFileDataSource } from '../datasource/CityCodeFileDataSource';
import { common } from '@kit.AbilityKit'
import { BusinessError } from '@ohos.base';
import { log } from 'lib_common/src/main/ets/utils/Logger';

const TAG = 'CityCodeHelper'

class CityCodeHelper {
  constructor() {
    CityCodeFileDataSource.init(getContext(this) as common.ApplicationContext)
  }

  /*
   * 此方法提供的CityCodeBean 类型绝对安全，无需再次转换
   * */
  getCityCodes():Array<CityCodeBean> {
    const cityCodes = CityCodeFileDataSource.getCityCodes()
    if (cityCodes == null) {
      return this.getLocalCityCodeTransformer()
    }else {
      let safeCityCodes:Array<CityCodeBean> = []
      cityCodes.forEach((item)=>{
        safeCityCodes.push(this.transform(item))
      })
      return safeCityCodes
    }
  }

  /*
   * 保存网络上同步得到的城市码表数据
   * @param cityCodes: 原始数据表弱类型对象，但是必须符合`CityCodeBean`的数据结构
   * @param version:获取到的版本号
   * */
  saveCityCodes(cityCodes:Array<CityCodeBean>, version:number) {
    CityCodeFileDataSource.saveCityCodes(cityCodes, version)
  }

  private getLocalCityCodeTransformer():Array<CityCodeBean> {
    try {
      let rawFile: Uint8Array = getContext(this).resourceManager.getRawFileContentSync('city_code.json');
      let localCityCodeStr: string = util.TextDecoder.create("utf-8", { ignoreBOM: true }).decodeWithStream(rawFile);
      let localCityCodes:Array<CityCodeBean> = []
      const _cityCodes:Array<CityCodeBean> = JSON.parse(localCityCodeStr) as Array<CityCodeBean>
      _cityCodes.forEach((item)=>{
        localCityCodes.push(this.transform(item))
      })
      return localCityCodes
    } catch (error) {
      let code = (error as BusinessError).code;
      let message = (error as BusinessError).message;
      log.error(TAG, `getRawFileContentSync failed, error code: ${code}, message: ${message}.`)
      return []
    }
  }

  private transform(data:Object):CityCodeBean {
    let original:CityCodeBean = data as CityCodeBean
    let subs:Array<CityCodeBean> | null = []
    if (Array.isArray(original.sub)) {
      original.sub?.forEach((item)=>{
        subs?.push(this.transform(item))
      })
    }else {
      subs = null
    }

    return new CityCodeBean(
      original.id,
      original.name,
      original.shortName,
      original.type,
      original.parentId,
      original.levelType,
      original.pinyin,
      original.shortPinyin,
      subs
    )
  }
}

export const cityCodeInstance = new CityCodeHelper()
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.
41.
42.
43.
44.
45.
46.
47.
48.
49.
50.
51.
52.
53.
54.
55.
56.
57.
58.
59.
60.
61.
62.
63.
64.
65.
66.
67.
68.
69.
70.
71.
72.
73.
74.
75.
76.
77.
78.
79.
80.
81.
82.
83.