HarmonyOS 鸿蒙Next模拟器无法获取、查看沙盒文件

使用官方文档中的方法无法获取沙盒内文件，一直显示：listFile download succeed : []
let listFileOption: ListFileOptions = {
  recursion: true,
  listNum: 0,
  filter: {
    suffix: [".png", “.jpg”, “.jpeg”],
    displayName: [“abc", "efg”],
    fileSizeOver: 1024
  }
};
fs.listFile(dirPath, listFileOption, (err: BusinessError, filenames: Array<string>) => {
  if (err) {
    console.error("list download file failed with error message: " + err.message + ", error code: " + err.code);
  } else {
    console.info(listFile download succeed : ${JSON.stringify(filenames)});
    for (let i = 0; i < filenames.length; i++) {
      console.info(“filename: %s”, filenames[i]);
    }
  }
});