private ProgressDialog mProgressDialog; private void showProgressDialog() { if (mProgressDialog == null) { mProgressDialog = new ProgressDialog(this); mProgressDialog.setMessage(getString(R.string.loading)); mProgressDialog.setIndeterminate(true); } mProgressDialog.show(); } private void hideProgressDialog() { if (mProgressDialog != null && mProgressDialog.isShowing()) { mProgressDialog.hide(); } }