Code example for File

  private static void verifyExternalStorageForExport() throws NoExternalStorageException { 
    if (!Environment.getExternalStorageDirectory().canWrite())
      throw new NoExternalStorageException(); 
 
    String exportDirectoryPath = getExportDirectoryPath();
    File exportDirectory       = new File(exportDirectoryPath);
 
    if (!exportDirectory.exists())
      exportDirectory.mkdir();
  } 
 
  private static void verifyExternalStorageForImport() throws NoExternalStorageException { 
    if (!Environment.getExternalStorageDirectory().canRead() ||
        !(new File(getExportDirectoryPath()).exists()))
        throw new NoExternalStorageException(); 
  } 
 
  private static void migrateFile(File from, File to) {
    try { 
      if (from.exists()) {