protected void unpackComponents() throws IOException, FileNotFoundException {
    File applicationPackage = new File(getApplication().getPackageResourcePath());
    File componentsDir = new File(sGREDir, "components");
    if (componentsDir.lastModified() == applicationPackage.lastModified()) return;

    componentsDir.mkdir();
    componentsDir.setLastModified(applicationPackage.lastModified());

    GeckoAppShell.killAnyZombies();

    ZipFile zip = new ZipFile(applicationPackage);

    byte[] buf = new byte[32768];
    try {
      if (unpackFile(zip, buf, null, "removed-files")) removeFiles();
    } catch (Exception ex) {
      // This file may not be there, so just log any errors and move on
      Log.w(LOG_FILE_NAME, "error removing files", ex);
    }

    // copy any .xpi file into an extensions/ directory
    Enumeration<? extends ZipEntry> zipEntries = zip.entries();
    while (zipEntries.hasMoreElements()) {
      ZipEntry entry = zipEntries.nextElement();
      if (entry.getName().startsWith("extensions/") && entry.getName().endsWith(".xpi")) {
        Log.i("GeckoAppJava", "installing extension : " + entry.getName());
        unpackFile(zip, buf, entry, entry.getName());
      }
    }
  }
  /*
   * Checks if directory doesn't already exist, then makes the file and
   * returns true if all went well. Returns false if the file directory
   * already exists.
   */
  public static boolean createDirectory(File dir, String hideCommand)
      throws IOException, InterruptedException {
    if (!dir.exists()) {
      dir.mkdir();

      if (!hideCommand.trim().equals("")) {
        // hideFile(dir);
      }
      return true;
    }

    return false;
  }