private void changeFragment(Fragment fragment) {
    if (fragment == null || fragment == currentFragment) return;

    FragmentTransaction fragTransaction = getSupportFragmentManager().beginTransaction();
    fragTransaction.setReorderingAllowed(true);
    fragTransaction.setCustomAnimations(
            R.anim.fade_in_transaction,
            R.anim.fade_out_transaction
    );

    if (currentFragment != null && !currentFragment.isHidden()) {
        fragTransaction.hide(currentFragment);
    }
    Fragment savedFragment = getSupportFragmentManager()
            .findFragmentByTag(fragment.getClass().getSimpleName());

    if (savedFragment == null) {
        fragTransaction.add(R.id.container, fragment
                , fragment.getClass().getSimpleName());
        this.currentFragment = fragment;
    } else {
        if (savedFragment.isHidden()) {
            fragTransaction.show(savedFragment);
        }
        this.currentFragment = savedFragment;
    }

    if (getSupportFragmentManager().getPrimaryNavigationFragment() == null) {
        if (fragment instanceof FragmentHome) {
            fragTransaction.setPrimaryNavigationFragment(fragment);
        }
    }
    fragTransaction.commit();
}