How can I check how much free space an SD card mounted on an Android device has?

Question

How can I programmatically check how much free space an SD card mounted on an Android device has?

Answer 1

To get the external SD card's available "free" space to show a number which agrees with the Menu->Settings->SD card and phone storage's number, use the following code:

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; 

Relevant documentation: 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 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;     } }