获取手机外部存储卡的剩余空间

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我是靠谱客的博主现代睫毛，最近开发中收集的这篇文章主要介绍获取手机外部存储卡的剩余空间，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

private void showSize()
{
    /* 将TextView及ProgressBar设定为空值及0 */
    myTextView.setText(""); myProgressBar.setProgress(0);
    /* 判断记忆卡是否插入 */
    if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
    {
      /* 取得SD CARD档案路径一般是/sdcard */
      File path = Environment.getExternalStorageDirectory();
      /* StatFs看文件系统空间使用状况 */
      StatFs statFs = new StatFs(path.getPath());
      /* Block的size */
      long blockSize = statFs.getBlockSize();
      /* 总Block数量 */
      long totalBlocks = statFs.getBlockCount();
      /* 已使用的Block数量 */
      long availableBlocks = statFs.getAvailableBlocks();
      String[] total = fileSize(totalBlocks * blockSize);
      String[] available = fileSize(availableBlocks * blockSize);
      /* getMax取得在main.xml里ProgressBar设定的最大值 */
      int ss = Integer.parseInt(available[0]) * myProgressBar.getMax() / Integer.parseInt(total[0]);
      myProgressBar.setProgress(ss);
      String text = "总共" + total[0] + total[1] + "n"; text += "可用" + available[0] + available[1];
      myTextView.setText(text); }
    else if (Environment.getExternalStorageState().equals( Environment.MEDIA_REMOVED))
    {
      String text = "SD CARD已移除"; myTextView.setText(text);
      }
    }
/* 回传为字符串数组[0]为大小[1]为单位KB或MB */
private String[] fileSize(long size)
{
    String str = "";
    if (size >= 1024)
    {
      str = "KB";
      size /= 1024;
      if (size >= 1024)
      {
        str = "MB";
        size /= 1024;
        }
      }
    DecimalFormat formatter = new DecimalFormat();
    /* 每3个数字用,分隔如：1,000 */
    formatter.setGroupingSize(3);
    String result[] = new String[2];
    result[0] = formatter.format(size);
    result[1] = str; return result;
    }