Dialog does not show() the 2nd time immediately after hide() / dismiss()
public void onResume(){
  super.onResume();
  ...
  // initialize the dialog
  mWaitingDialog = new WaitingDialog(getActivity());
  ...
}

public class WaitingDialog extends ProgressDialog {

    public WaitingDialog(Context context) {
        super(context);
        setMessage(context.getText(R.string.searching));
        setIndeterminate(true);
        setCancelable(true);
    }
}

mWaitingDialog.hide();

private void performGeolocationRequest(EditText v) {
  mWaitingDialog.show();
  ...
}