How can I get the list of mounted external storage of android device

Question

Here we are developing android app for android TV box. How can I get the list of mounted external storage like USB stick, SDCARD and SATA HDD.

Answer 1

I use /proc/mounts file to get the list of available storage options

public class StorageUtils {      private static final String TAG = "StorageUtils";      public static class StorageInfo {          public final String path;         public final boolean readonly;         public final boolean removable;              public final int number;          StorageInfo(String path, boolean readonly, boolean removable, int number) {             this.path = path;             this.readonly = readonly;             this.removable = removable;                      this.number = number;         }          public String getDisplayName() {             StringBuilder res = new StringBuilder();             if (!removable) {                 res.append("Internal SD card");             } else if (number > 1) {                 res.append("SD card " + number);             } else {                 res.append("SD card");             }             if (readonly) {                 res.append(" (Read only)");             }             return res.toString();         }     }      public static List<StorageInfo> getStorageList() {          List<StorageInfo> list = new ArrayList<StorageInfo>();         String def_path = Environment.getExternalStorageDirectory().getPath();         boolean def_path_removable = Environment.isExternalStorageRemovable();         String def_path_state = Environment.getExternalStorageState();         boolean def_path_available = def_path_state.equals(Environment.MEDIA_MOUNTED)                                     || def_path_state.equals(Environment.MEDIA_MOUNTED_READ_ONLY);         boolean def_path_readonly = Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED_READ_ONLY);          HashSet<String> paths = new HashSet<String>();         int cur_removable_number = 1;          if (def_path_available) {             paths.add(def_path);             list.add(0, new StorageInfo(def_path, def_path_readonly, def_path_removable, def_path_removable ? cur_removable_number++ : -1));         }          BufferedReader buf_reader = null;         try {             buf_reader = new BufferedReader(new FileReader("/proc/mounts"));             String line;             Log.d(TAG, "/proc/mounts");             while ((line = buf_reader.readLine()) != null) {                 Log.d(TAG, line);                 if (line.contains("vfat") || line.contains("/mnt")) {                     StringTokenizer tokens = new StringTokenizer(line, " ");                     String unused = tokens.nextToken(); //device                     String mount_point = tokens.nextToken(); //mount point                     if (paths.contains(mount_point)) {                         continue;                     }                     unused = tokens.nextToken(); //file system                     List<String> flags = Arrays.asList(tokens.nextToken().split(",")); //flags                     boolean readonly = flags.contains("ro");                      if (line.contains("/dev/block/vold")) {                         if (!line.contains("/mnt/secure")                             && !line.contains("/mnt/asec")                             && !line.contains("/mnt/obb")                             && !line.contains("/dev/mapper")                             && !line.contains("tmpfs")) {                             paths.add(mount_point);                             list.add(new StorageInfo(mount_point, readonly, true, cur_removable_number++));                         }                     }                 }             }          } catch (FileNotFoundException ex) {             ex.printStackTrace();         } catch (IOException ex) {             ex.printStackTrace();         } finally {             if (buf_reader != null) {                 try {                     buf_reader.close();                 } catch (IOException ex) {}             }         }         return list;     } } 

Answer 2

To get all available external storage folders (including SD cards), you can use this :

File[] externalStorageFiles=ContextCompat.getExternalFilesDirs(this,null); 

To go to the "root" of each external storage (the one that is the real mounting folder path), you can use this function I've made:

  /** Given any file/folder inside an sd card, this will return the path of the sd card */   private static String getRootOfInnerSdCardFolder(File file)     {     if(file==null)       return null;     final long totalSpace=file.getTotalSpace();     while(true)       {       final File parentFile=file.getParentFile();       if(parentFile==null||parentFile.getTotalSpace()!=totalSpace)         return file.getAbsolutePath();       file=parentFile;       }     }