Find the External Storage on Any Android Device of Any Manufacturer

       


/**
 * This class is implemented by Kumar Vivek Mitra on 10_1_2014
 * to find the exact external storage onto the android device,
 * as external storage keep changing according to the manufactures.
 * THIS CLASS CAN ALSO BE USED TO FIND ALL THE STORAGES ON THE ANDROID DEVICES
 */



package com.promact.model.syncserver;

import java.io.InputStream;
import java.util.HashSet;
import java.util.Locale;

public class ExternalStorageFinderClass {
 
 
 ///// ----------------------------------- Java Instance Variables
 
 private static ExternalStorageFinderClass externalStorageUniquesInstance = new ExternalStorageFinderClass();
 
 ///// ----------------------------------- Java Instance Variables
 
 
 ///// ----------------------------------- Android Instance Variables
 
 
 
 ///// ----------------------------------- Android Instance Variables
 
 
 
 /**
  * Private Constructor to prevent creation of an instance of this class
  * from outside.
  */
 private ExternalStorageFinderClass(){}  
 
 
 
 
 /**
  * Method to get the Unique instance of this class
  */
 public static ExternalStorageFinderClass getInstance(){
  
  return externalStorageUniquesInstance;
 }
 
 

 /**
  * Method to get the external storages
  */
 public static HashSet getExternalStorages() {
     final HashSet out = new HashSet();
     String reg = "(?i).*vold.*(vfat|ntfs|exfat|fat32|ext3|ext4).*rw.*";
     String s = "";
     try {
         final Process process = new ProcessBuilder().command("mount").redirectErrorStream(true).start();
         process.waitFor();
         final InputStream is = process.getInputStream();
         final byte[] buffer  = new byte[1024];
         
         while (is.read(buffer) != -1) {
             s = s + new String(buffer);
         }
         
         is.close();
     } catch (final Exception e) {e.printStackTrace();}

     // filter/process output
     final String[] lines = s.split("\n");
     for (String line : lines) {
         if (!line.toLowerCase(Locale.US).contains("asec")) {
             if (line.matches(reg)) {
                 String[] parts = line.split(" ");
                 for (String part : parts) {
                     if (part.startsWith("/"))
                         if (!part.toLowerCase(Locale.US).contains("vold"))
                             out.add(part);
                 }
             }
         }
     }
     return out;
 }
 
 /** 
  * To get the first entry of the
  * HashSet returned from ExternalStorageFinderClass
  * by invoking its getExternalStorage() method, by Kumar Vivek Mitra 1_10_2014
  */
 public String getExtPath(){
 
   String extPath = "";
   
  // Edited for making it compatible with Nexus 5 by Kumar Vivek Mitra 18_6_2014
  if(getExternalStorages().toArray().length == 0){
   
         extPath = Environment.getExternalStorageDirectory().toString();
  }
  else{
         extPath = getExternalStorages().toArray()[0].toString();
  }
  
  return extPath;
 }
}