获取磁盘空间大小计算成看k,m,G-优快云博客

本文介绍了一种在Android设备上通过Java代码获取SD卡剩余空间的方法，并提供了一个将字节数转换为常见大小单位（如MB, GB, TB等）的函数。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

2019独角兽企业重金招聘Python工程师标准>>>

/**
* 获取硬盘空间
*/
private static long getSdcSpace() {
final String MOUNTS_FILE = "/proc/mounts";
String sdcPath = "";
BufferedReader br = null;
String strLine = null;
String rs = "\\/mnt/sd[a-z]\\/sd[a-z]\\d";
boolean bMounted = false;
try {
br = new BufferedReader(new FileReader(MOUNTS_FILE));
while ((strLine = br.readLine()) != null) {
// Log.d(TAG, "strLine ====>>>"+strLine.toString());
Pattern p = Pattern.compile(rs);
Matcher m = p.matcher(strLine.toString());
while (m.find()) {
bMounted = true;
sdcPath = m.group(0);
Log.d(TAG, "sdc mount path = " + m.group(0));
break;
}
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
if (br != null) {
try {
br.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
br = null;
}

try {
if (bMounted) {
StatFs stat = new StatFs(sdcPath);
long blockSize = stat.getBlockSize();
long availableBlocks = stat.getAvailableBlocks();
Log.d(TAG, "free sdc space = " + availableBlocks * blockSize);
return availableBlocks * blockSize;
}
} catch (Exception e) {
// TODO: handle exception
}
return 0L;
}

//根据字节数生成大小单位

private static String fileSize(long size) {
    // 从MB开始统计
    long tmpsize = size / (1024 * 1024);
    StringBuffer sb = new StringBuffer();
    if (tmpsize <= 1024) {
        sb.append(String.valueOf(tmpsize));
        sb.append("MB");
    } else {
        if ((tmpsize / 1024) < 1024) {
            sb.append(String.valueOf(tmpsize / 1024));
            sb.append("GB");
            sb.append(String.valueOf(tmpsize % 1024));
            sb.append("MB");
        } else {
            sb.append(String.valueOf(tmpsize / (1024 * 1024)));
            sb.append("TB");
            tmpsize /= 1024;
            sb.append(String.valueOf(tmpsize / 1024));
            sb.append("GB");
            sb.append(String.valueOf(tmpsize % 1024));
            sb.append("MB");
        }

    }

    Log.d(TAG, "sdc space  = = " + sb.toString());
    return sb.toString();
}

转载于:https://my.oschina.net/u/2502529/blog/821931