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 trialtinasheleroynechibvute
18,391 PointsI can't figure out what is required here??
We need to make sure that we aren't recreating our NewsFragment if it already exists.
Inside onCreate, create a new variable to store our saved NewsFragment and use 'findFragmentById' (with an id of 'R.id.placeholder') to set it.
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();
}
@Override
public void onNewsItemSelected(int index) {
}
}
2 Answers
wandile moyo
2,508 Pointspublic class MainActivity extends AppCompatActivity implements NewsFragment.NewsListener { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); 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(); } }
@Override
public void onNewsItemSelected(int index) {
} }
tinasheleroynechibvute
18,391 PointsThanks I managed to figure it out.
DANIAL GARUNOV
2,068 PointsDANIAL GARUNOV
2,068 PointsI'am not sure, but maybe there is something about savedInstanceState? Make a condition - if (savedInstanceState!=null) { ... }