在PreferenceFragment和android.support支持.v4版本。应用程序碎片;

我有一个底部导航视图,可以在片段之间导航。第三个片段是 PreferenceFragment Fragment . 我有一个简单的替换片段的开关盒,但我得到一个错误 SettingsFragment cannot be converted to Fragment

如何在这些片段之间导航?

  BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener = new BottomNavigationView.OnNavigationItemSelectedListener() {
        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem item) {
            Fragment selectedFragment = null;
            switch (item.getItemId()) {
                case R.id.navigation_home:
                    toolbar.setTitle("Home");
                    selectedFragment = HomeFragment.newInstance();
                    break;
                case R.id.navigation_dashboard:
                    toolbar.setTitle("Dashboard");
                    selectedFragment = DashboardFragment.newInstance();
                    break;
                case R.id.navigation_settings:
                    toolbar.setTitle("Settings");
                    selectedFragment = SettingsFragment.newInstance();
                    break;
            }
            FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
            transaction.replace(R.id.fragmentContainer, selectedFragment);
            transaction.commit();
            return true;
        }
    };