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 Handling Clicks

Tefo Temba Kebitseng
Tefo Temba Kebitseng
6,049 Points

Handling Clicks challenge 2 of 2

I have created an interface called NewsListener in the NewsFragment class. I get error when i implement this interface in the MainActivity ...the error states that i can override method onNewsItemSelected(int) method..MainActivity does not override onNewsItemSelected.

Please help.

NewsFragment.java
public class NewsFragment extends Fragment {

   public interface NewsListener {
   void onNewsItemSelected();
  }
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_news, container, false);
        return view;
    }
}
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 = new NewsFragment();
        FragmentManager fragmentManager = getFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        fragmentTransaction.add(R.id.placeholder, newsFragment);
        fragmentTransaction.commit();
    }
}

1 Answer

Seth Kroger
Seth Kroger
56,413 Points

In order to implement the interface, you need to add an onNewsItemSelected method to MainActivity. When you implement an interface, you need to supply all of its methods.

Tefo Temba Kebitseng
Tefo Temba Kebitseng
6,049 Points

Thank you Seth. I ran the through the videos and figured out why you were also suggesting the same solution..though i took days i now understand how it goes.