如何以编程方式检查安装在Android设备上的SD卡有多少可用空间?
答案 0 :(得分:80)
要获得外部SD卡可用的“免费”空间以显示与菜单 - >设置 - > SD卡和手机存储号码一致的号码,请使用以下代码:
StatFs stat = new StatFs(Environment.getExternalStorageDirectory().getPath());
double sdAvailSize = (double)stat.getAvailableBlocks()
* (double)stat.getBlockSize();
//One binary gigabyte equals 1,073,741,824 bytes.
double gigaAvailable = sdAvailSize / 1073741824;
相关文档:http://developer.android.com/reference/android/os/StatFs.html
答案 1 :(得分:13)
/**
* This class is designed to get available space in external storage of android.
* It contains methods which provide you the available space in different units e.g
* bytes, KB, MB, GB. OR you can get the number of available blocks on external storage.
*
*/
public class AvailableSpaceHandler {
//*********
//Variables
/**
* Number of bytes in one KB = 2<sup>10</sup>
*/
public final static long SIZE_KB = 1024L;
/**
* Number of bytes in one MB = 2<sup>20</sup>
*/
public final static long SIZE_MB = SIZE_KB * SIZE_KB;
/**
* Number of bytes in one GB = 2<sup>30</sup>
*/
public final static long SIZE_GB = SIZE_KB * SIZE_KB * SIZE_KB;
//********
// Methods
/**
* @return Number of bytes available on external storage
*/
public static long getExternalAvailableSpaceInBytes() {
long availableSpace = -1L;
try {
StatFs stat = new StatFs(Environment.getExternalStorageDirectory().getPath());
availableSpace = (long) stat.getAvailableBlocks() * (long) stat.getBlockSize();
} catch (Exception e) {
e.printStackTrace();
}
return availableSpace;
}
/**
* @return Number of kilo bytes available on external storage
*/
public static long getExternalAvailableSpaceInKB(){
return getExternalAvailableSpaceInBytes()/SIZE_KB;
}
/**
* @return Number of Mega bytes available on external storage
*/
public static long getExternalAvailableSpaceInMB(){
return getExternalAvailableSpaceInBytes()/SIZE_MB;
}
/**
* @return gega bytes of bytes available on external storage
*/
public static long getExternalAvailableSpaceInGB(){
return getExternalAvailableSpaceInBytes()/SIZE_GB;
}
/**
* @return Total number of available blocks on external storage
*/
public static long getExternalStorageAvailableBlocks() {
long availableBlocks = -1L;
try {
StatFs stat = new StatFs(Environment.getExternalStorageDirectory().getPath());
availableBlocks = stat.getAvailableBlocks();
} catch (Exception e) {
e.printStackTrace();
}
return availableBlocks;
}
}
答案 2 :(得分:10)
这是一种更简单的方法,自API级别9起可用:
Environment.getExternalStorageDirectory().getUsableSpace();
http://developer.android.com/reference/java/io/File.html#getUsableSpace()
答案 3 :(得分:2)
此代码对我有用:
view
答案 4 :(得分:0)
public static float megabytesAvailable(String StrPath) {
StatFs stat = new StatFs(StrPath);
long bytesAvailable = (long)stat.getBlockSize() * (long)stat.getAvailableBlocks();
return bytesAvailable / (1024.f * 1024.f);
}