Preventing the back button from cancelling a DialogFragment

I have a Fragment that can create and pop up a DialogFragment, but when I hit the back button, it dismisses the dialog even though I explicitly call setCancelable(false); Is there any way for my DialogFragment to be insensative to the back button? ``` public class LoadingDialogFragment extends DialogFragment { String title; String msg; public LoadingDialogFragment() { this.title = "Loading..."; this.msg = "Please wait..."; } public LoadingDialogFragment(String title, String msg) { this.title = title; this.msg = msg; } @Override public Dialog onCreateDialog(final Bundle savedInstanceState) { final ProgressDialog dialog = new ProgressDialog(getActivity()); dialog.setTitle(title); dialog.setMessage(msg); dialog.setIndeterminate(true); dialog.setCanceledOnTouchOutside(false); dialog.setCancelable(false); return dialog; } } ``` I create the DialogFragment from an AsyncTask: ``` private class GpsTask extends AsyncTask<String, Integer, Integer> { //ProgressDialog dialog; @Override protected void onPreExecute() { FragmentTransaction ft = getSupportFragmentManager().beginTransaction(); DialogFragment newFragment = new LoadingDialogFragment("Gathering Location", "Acquiring GPS lock..."); ft.addToBackStack(null); newFragment.show(ft, "dialog"); } @Override protected Integer doInBackground(String... params) { //acquire a GPS lock and grab a few position updates } @Override protected void onProgressUpdate(Integer... input) { } @Override protected void onPostExecute(Integer result) { getSupportFragmentManager().popBackStackImmediate(); } } ```