Android中StatFs获取系统/sdcard存储(剩余空间)大小

StatFs一个模拟linux的df命令的一个类,获得SD卡和手机内存的使用情况

StatFs常用方法:

Java代码：

getAvailableBlocks()

解释：返回 Int ，获取当前可用的存储空间

getBlockCount()

解释：返回 Int ，获取该区域可用的文件系统数

getBlockSize()

解释：返回 Int ，大小，以字节为单位，一个文件系统

getFreeBlocks()

解释：返回 Int ，该块区域剩余的空间

restat(String path)

解释：执行一个由该对象所引用的文件系统

package com.orgcent.util;

import java.io.File;

import android.os.Environment;

import android.os.StatFs;

public class MemoryStatus
{

static final
int ERROR = -1;

/**

* 外部存储是否可用

* @return

*/

static public
boolean externalMemoryAvailable()
{

return android.os.Environment.getExternalStorageState().equals(

android.os.Environment.MEDIA_MOUNTED);

}

/**

* 获取手机内部可用空间大小

* @return

*/

static public
long getAvailableInternalMemorySize()
{

File path =
Environment.getDataDirectory();

StatFs stat = new StatFs(path.getPath());

long blockSize = stat.getBlockSize();

long availableBlocks = stat.getAvailableBlocks();

return availableBlocks * blockSize;

}

/**

* 获取手机内部空间大小

* @return

*/

static public
long getTotalInternalMemorySize()
{

File path =
Environment.getDataDirectory();

StatFs stat = new StatFs(path.getPath());

long blockSize = stat.getBlockSize();

long totalBlocks = stat.getBlockCount();

return totalBlocks * blockSize;

}

/**

* 获取手机外部可用空间大小

* @return

*/

static public
long getAvailableExternalMemorySize()
{

if (externalMemoryAvailable())
{

File path =
Environment.getExternalStorageDirectory();

StatFs stat = new StatFs(path.getPath());

long blockSize = stat.getBlockSize();

long availableBlocks = stat.getAvailableBlocks();

return availableBlocks * blockSize;

} else
{

return ERROR;

}

}

/**

* 获取手机外部空间大小

* @return

*/

static public
long getTotalExternalMemorySize()
{

if (externalMemoryAvailable())
{

File path =
Environment.getExternalStorageDirectory();

StatFs stat = new StatFs(path.getPath());

long blockSize = stat.getBlockSize();

long totalBlocks = stat.getBlockCount();

return totalBlocks * blockSize;

} else
{

return ERROR;

}

}

static public
String formatSize(long size)
{

String suffix =
null;

if (size
>= 1024)
{

suffix = "KiB";

size /= 1024;

if (size
>= 1024)
{

suffix = "MiB";

size /= 1024;

}

}

StringBuilder resultBuffer = new StringBuilder(Long.toString(size));

int commaOffset = resultBuffer.length()
- 3;

while (commaOffset
> 0) {

resultBuffer.insert(commaOffset,
',');

commaOffset -= 3;

}

if (suffix
!= null)

resultBuffer.append(suffix);

return resultBuffer.toString();

}

}