Android Open Source - EBrowser I O Utils

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * Zirco Browser for Android/*from www.j a v a2s  .  c om*/
 * 
 * Copyright (C) 2010 J. Devauchelle and contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 3 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

package org.zirco.utils;

import java.io.File;
import java.io.FileFilter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

import android.os.Environment;

/**
 * Utilities for I/O reading and writing.
 */
public class IOUtils {
  
  private static final String APPLICATION_FOLDER = "zirco";
  private static final String DOWNLOAD_FOLDER = "downloads";
  private static final String BOOKMARKS_EXPORT_FOLDER = "bookmarks-exports";
  
  /**
   * Get the application folder on the SD Card. Create it if not present.
   * @return The application folder.
   */
  public static File getApplicationFolder() {
    File root = Environment.getExternalStorageDirectory();
    if (root.canWrite()) {
      
      File folder = new File(root, APPLICATION_FOLDER);
      
      if (!folder.exists()) {
        folder.mkdir();
      }
      
      return folder;
      
    } else {
      return null;
    }
  }
  
  /**
   * Get the application download folder on the SD Card. Create it if not present.
   * @return The application download folder.
   */
  public static File getDownloadFolder() {
    File root = getApplicationFolder();
    
    if (root != null) {
      
      File folder = new File(root, DOWNLOAD_FOLDER);
      
      if (!folder.exists()) {
        folder.mkdir();
      }
      
      return folder;
      
    } else {
      return null;
    }
  }
  
  /**
   * Get the application folder for bookmarks export. Create it if not present.
   * @return The application folder for bookmarks export.
   */
  public static File getBookmarksExportFolder() {
    File root = getApplicationFolder();
    
    if (root != null) {
      
      File folder = new File(root, BOOKMARKS_EXPORT_FOLDER);
      
      if (!folder.exists()) {
        folder.mkdir();
      }
      
      return folder;
      
    } else {
      return null;
    }
  }
  
  /**
   * Get the list of xml files in the bookmark export folder.
   * @return The list of xml files in the bookmark export folder.
   */
  public static List<String> getExportedBookmarksFileList() {
    List<String> result = new ArrayList<String>();
    
    File folder = getBookmarksExportFolder();    
    
    if (folder != null) {
      
      FileFilter filter = new FileFilter() {
        
        @Override
        public boolean accept(File pathname) {
          if ((pathname.isFile()) &&
              (pathname.getPath().endsWith(".xml"))) {
            return true;
          }
          return false;
        }
      };
      
      File[] files = folder.listFiles(filter);
      
      for (File file : files) {
        result.add(file.getName());
      }      
    }
    
    Collections.sort(result, new Comparator<String>() {

      @Override
      public int compare(String arg0, String arg1) {        
        return arg1.compareTo(arg0);
      }        
      });
    
    return result;
  }

}

Java Source Code List

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