文件大小最大两位小数显示

SDK 版本：HarmonyOS NEXT Developer Beta2 SDK (5.0.0.31)
DevEco-Studio 版本：DevEco Studio NEXT Developer Beta2 (5.0.3.502）
工程机版本：ALN-AL00 NEXT.0.0.31

文件大小最大两位小数显示

FileUtil.ets

/*
 * Copyright (c) 2024. Dench.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { intl } from "@kit.LocalizationKit";

export class FileUtil {
  /**
   * 文件大小最大两位小数显示
   */
  getFileSizeStr(size?: number): string {
    const numberFormat = new intl.NumberFormat("zh-CN", {
      maximumFractionDigits: 2,
    });
    if (size === undefined) {
      return "";
    }
    if (size >= this.GB) {
      return numberFormat.format(size / this.GB) + "G";
    }
    if (size >= this.MB) {
      return numberFormat.format(size / this.MB) + "M";
    }

    if (size >= this.KB) {
      return numberFormat.format(size / this.KB) + "k";
    }
    return size + "b";
  }

  private readonly KB = 1000;
  private readonly MB = 1000000;
  private readonly GB = 1000000000;
}

Reference

https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/i18n-numbers-weights-measures-V5#%E6%95%B0%E5%AD%97%E6%A0%BC%E5%BC%8F%E5%8C%96