如何检查安装在Android设备上的SD卡有多less可用空间？

如何以编程方式检查安装在Android设备上的SD卡有多less可用空间？

Answer 1

为了让外部SD卡的“空闲”空间显示与“菜单 – >设置 – > SD卡和电话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

Answer 2

 /** * 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 eg * 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; } } 

Answer 3

这是一个更简单的方法，从API级别9开始可用：

 Environment.getExternalStorageDirectory().getUsableSpace(); 

http://developer.android.com/reference/java/io/File.html#getUsableSpace（）;

Answer 4

此代码正在为我工​​作：

 StatFs stat = new StatFs(System.getenv("SECONDARY_STORAGE")); long bytesAvailable = (long)stat.getBlockSize() * (long)stat.getAvailableBlocks(); long kiloAvailable = bytesAvailable / 1024; // Available space from SD in KB long megaAvailable = bytesAvailable / (1024*1024); // Available space from SD in MB return (int)kiloAvailable; 

Answer 5

 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); }