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Android Android Fragments Introducing Fragments Saving State

Now only create and add a new NewsFragment if there was no saved NewsFragment I am stuck here,please help

bummer! too many NewsFragment how can i solve this problem?

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

        FragmentManager fragmentManager = getFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        fragmentTransaction.add(R.id.placeholder, newsFragment);
        fragmentTransaction.commit();
    }

    @Override
  public void onNewsItemSelected(int index) {

  }
}

1 Answer

Ben Deitch
STAFF
Ben Deitch
Treehouse Teacher

Hey Nigel!

Looks like you're forgetting to check if you've already got a saved NewsFragment:

        NewsFragment savedFragment = (NewsFragment) getFragmentManager().findFragmentById(R.id.placeholder);
        if (savedFragment == null) {
          NewsFragment newsFragment = new NewsFragment();
          FragmentManager fragmentManager = getFragmentManager();
          FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
          fragmentTransaction.add(R.id.placeholder, newsFragment);
          fragmentTransaction.commit();
        }