@Override
 public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
   switch (buttonView.getId()) {
     case R.id.qslide_checkbox:
       mPrefs.calculatorForceFloating().put(isChecked);
       Toast.makeText(getActivity(), R.string.changed_successfully, Toast.LENGTH_SHORT).show();
       break;
   }
 }
 @AfterViews
 void init() {
   mQslide.setChecked(mPrefs.calculatorForceFloating().get());
   mQslide.setOnCheckedChangeListener(this);
 }