@Override
 public void onClick(View v) {
   switch (v.getId()) {
     case R.id.btn_reset:
       password = "";
       mBtnDone.setEnabled(false);
       break;
     case R.id.btn_done:
       mConfig.setPatternPassword(MD5Utils.MD5(password));
       getActivity().setResult(Activity.RESULT_OK);
       getActivity().finish();
       break;
     default:
       break;
   }
 }