public void navigationToFragment(Fragment fragment, Bundle bundle, String strTitle){
        String fragmentName = fragment.getClass().getName();
        FragmentManager manager = getSupportFragmentManager();
        boolean isFragmentPop = manager.popBackStackImmediate (fragmentName, 0);
        FragmentTransaction ft = manager.beginTransaction();

        if (isFragmentPop) fragment=manager.findFragmentByTag(fragmentName);
        if (bundle!=null) fragment.setArguments(bundle);
        if (strTitle!=null) getSupportActionBar().setTitle(strTitle);

        ft.replace(R.id.container,fragment,fragmentName);
        ft.addToBackStack(fragmentName);
        ft.commit();
    }

@Override
public void onSaveInstanseState(Bundle outState) {
    outState.putExtra("checked", checkBox.isChecked());
    super.onSaveInstanseState(outState);
}

if(savedInstanceState != null) {
    checkBox.setChecked(savedInstanceState.getBooleanExtra("checked"));
}