Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Android Android Fragments Introducing Fragments Saving State

Tuan Zen
Tuan Zen
6,882 Points

NewsFragment saving state

i got the "cannot find symbol" error on the getFragmentManager in this code for some reason. I dont think im understanding this correctly.

MainActivity.java
public class MainActivity extends AppCompatActivity
   implements NewsFragment.NewsListener {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        NewsFragment savedNewsFragment = (NewsFragment) getFragmentManager.findFragmentById(R.id.placeholder);

        if(savedNewsFragment == null) {
        NewsFragment newsFragment = new NewsFragment();
        FragmentManager fragmentManager = getFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();

        fragmentTransaction.add(R.id.placeholder, newsFragment);
        fragmentTransaction.commit();
        }
    }

    @Override
  public void onNewsItemSelected(int index) {

  }
}

1 Answer

Kourosh Raeen
Kourosh Raeen
23,733 Points

Hi Tuan - You are very close. The only issue is when you're calling getFragmantManager() you've forgotten the parenthesis:

NewsFragment savedNewsFragment = (NewsFragment) getFragmentManager().findFragmentById(R.id.placeholder);
Tuan Zen
Tuan Zen
6,882 Points

lol thanks so much java is so strict on everything