public static File saveImage(Bitmap bmp) {
  File appDir = new File(Environment.getExternalStorageDirectory(), "Boohee");
  if (!appDir.exists()) {
    appDir.mkdir();
  }
  String fileName = System.currentTimeMillis() + ".jpg";
  File file = new File(appDir, fileName);
  try {
    FileOutputStream fos = new FileOutputStream(file);
    bmp.compress(CompressFormat.JPEG, 100, fos);
    fos.flush();
    fos.close();
  } catch (FileNotFoundException e) {
    e.printStackTrace();
  } catch (IOException e) {
    e.printStackTrace();
  }
}