“Rotating wheel” progress dialog while deleting folder from SD card

Question

I want to display simple progress dialog with rotating wheel, while deleting folder from SD card. I have a following piece of code:

  ProgressDialog dialog =         


        

Answer 1

private void deleteCache() {
  ProgressDialog dialog = ProgressDialog.show(this, "",
    "Please wait for few seconds...", true);

  Runnable myRun = new Runnable() {
    public void run() {
      File f = new File(Environment.getExternalStorageDirectory()
        .getAbsoluteFile() + Constants.DATA_DIR);
      deleteDirectory(f);

      runOnUiThread(new Runnable() {
        @Override
        public void run() {
          dialog.dismiss();
        }
      });
    }
  }
}

private void deleteDirectory(File path) {
  if (path.exists()) {
    File[] files = path.listFiles();
    for (int i = 0; i < files.length; i++) {
      if (files[i].isDirectory()) {
        deleteDirectory(files[i]);
      } else {
        files[i].delete();
      }
    }
  }

  return (path.delete());
}