HarmonyOS App访问模拟器文件或目录问题

private context = getContext(this) as common.UIAbilityContext; 
try { 
  this.context.resourceManager.getRawFileContent("abc.json", (error: BusinessError, value: Uint8Array) => { 
    if (error != null) { 
      console.error("error is " + error); 
    } else { 
      let rawFile = value; 
    } 
  }); 
} catch (error) { 
  let code = (error as BusinessError).code; 
  let message = (error as BusinessError).message; 
  console.error(`callback getRawFileContent failed, error code: ${code}, message: ${message}.`); 
}

let rawFile = value; 
const documentSaveOptions = new picker.DocumentSaveOptions(); 
let savedFileName = new Date().getTime() + '.json';              documentSaveOptions.newFileNames = [savedFileName]; 
const documentViewPicker = new picker.DocumentViewPicker(); 
documentViewPicker.save(documentSaveOptions).then((documentSaveResult)=>{ 
  if (documentSaveResult !== null && documentSaveResult !== undefined) { 
    console.log('documentViewPicker.save to file succeed and uris are:' + documentSaveResult[0]); 
    let newFile = fs.openSync(documentSaveResult[0], fs.OpenMode.READ_WRITE); 
    let writeLen = fs.writeSync(newFile.fd, rawFile.buffer); 
    console.log('write data to file success and size is:' + writeLen); 
  } else { 
    console.log('') 
  } 
}).catch((err:BusinessError)=>{ 
  console.log(`Invoke documentViewPicker.save to file failed, code is ${err.code}, message is ${err.message}`) 
})