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Android Android Fragments Introducing Fragments Handling Clicks

NewsFragment implements in MainActivity

Seth Kroger am stuck here. Any help? Thanks

NewsFragment.java
public class NewsFragment extends Fragment {
  public interface NewsListener{
    void onNewsItemSelected(int index);

  }


    @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.OnNewsItemSelected {

    @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();
    }

    @Override
     public void onListNewsSelected(int index) {
     }
}

2 Answers

Seth Kroger
Seth Kroger
56,407 Points

The name of the interface after implements needs to match the name of the interface in NewsFragment.

Hi Seth. Initially I tried :

public class MainActivity extends AppCompatActivity implements NewsFragment.NewsListener

but it didn't work. That's why I changed it

Seth Kroger
Seth Kroger
56,407 Points

Both the interface name and the method name must match.

I finally understood what I needed to do. Thanks Seth