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Start your free trialKamran Arshad
9,312 PointsI created a new fragment to store our news items. It's called NewsItemFragment.java. When I went to add a constructor to
I'm getting this error:
./MainActivity.java:13: error: cannot find symbol NewsFragment savedFragment = (NewsFragment) getSupportFragmentManager().findFragmentByTag(NEWS_FRAGMENT); ^ symbol: method getSupportFragmentManager() location: class MainActivity 1 error
Here is my code:
public class MainActivity extends AppCompatActivity implements NewsFragment.NewsListener {
// New tags for referring to fragments
public static final String NEWS_FRAGMENT = "news_fragment";
public static final String NEWSITEM_FRAGMENT = "newsitem_fragment";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FragmentManager fragmentManager = getFragmentManager();
NewsFragment savedFragment = (NewsFragment) getSupportFragmentManager().findFragmentByTag(NEWS_FRAGMENT);
if (savedFragment == null) {
NewsFragment newsFragment = new NewsFragment();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.add(R.id.placeholder, newsFragment);
fragmentTransaction.commit();
}
}
@Override
public void onNewsItemSelected(int index) {
NewsItemFragment fragment = new NewsItemFragment();
Bundle bundle = new Bundle ();
bundle.putInt(NewsItemFragment.KEY_NEWS_ITEM_INDEX,index);
fragment.setArguments(bundle);
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.placeholder, fragment,NEWSITEM_FRAGMENT);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
}
}
public class NewsItemFragment extends Fragment {
public static final String KEY_NEWS_ITEM_INDEX = "news_item_index";
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// TODO: Hmmm, how do we get this index?
int index = 0;
getActivity().setTitle(News.headlines[index]);
View view = inflater.inflate(R.layout.fragment_newsitem, container, false);
return view;
}
@Override
public void onStop() {
super.onStop();
getActivity().setTitle(getResources().getString(R.string.app_name));
}
}
public class News {
public static String[] headlines = new String[]{
"Treehouse student develops #1 App in Google App Store",
"Oracle and Google decide to hug it out",
"Java8 coming to Android! Is it too late?"
};
}
Caleb Kleveter
Treehouse Moderator 37,862 PointsCaleb Kleveter
Treehouse Moderator 37,862 PointsHey Kamran! I wish i could tell what was wrong, but my Java is so rusty I really have no idea what the issue is. Hope you find the answer!