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Android

Posted by Mark Szente
Mark Szente
Courses Plus Student 21,053 Points

Android Fragments : adding fragment to placeholder task

Hey community, i have i get this error message and can't figure out why.

This is the task : Now create a new instance of this Fragment in MainActivity, and then add it to MainActivity's layout by using the placeholder ViewGroup (R.id.placeholder).

This is my code:

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

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

This is the error i get: Don't forget to include your NewsFragment instance as the second argument to the 'add' method.

Thanks for the help!

4 Answers

Seth Kroger
Seth Kroger
56,413 Points
Seth Kroger
Seth Kroger
56,413 Points

The challenge is asking you to create a specific kind of Fragment created for the challenge. You're creating just a general, blank Fragment instead.

TERRENCE MAVHUNGA
TERRENCE MAVHUNGA
6,053 Points
TERRENCE MAVHUNGA
TERRENCE MAVHUNGA
6,053 Points

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

Mark Szente
PLUS
Mark Szente
Courses Plus Student 21,053 Points
Mark Szente
Mark Szente
Courses Plus Student 21,053 Points

ty! i have changed the normal Fragment to NewsFragment and it worked!

Arthur Mbirimi
Arthur Mbirimi
4,560 Points
Arthur Mbirimi
Arthur Mbirimi
4,560 Points

Fragment fragment = new NewsFragment(); FragmentManager fragmentManager = getFragmentManager(); FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction(); fragmentTransaction.add(R.id.placeholder, fragment); fragmentTransaction.commit();