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Start your free trialEsinah Mutseta
4,717 Pointsi'm failing to pass this task please help
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 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) {
}
}
2 Answers
mongst
10,841 PointsSpoiler Alert:
public 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) {
}
}
Christopher Augg
21,223 PointsEsinah,
The provided code already creates a fragment manager named fragmentManager. Therefore, we can order our code to use it for both fragments. Then we try to get a saved fragment with findFragmentById, test if it returns null, and only create a new fragment if does.
FragmentManager fragmentManager = getFragmentManager();
NewsFragment saveNewsFragment = (NewsFragment)fragmentManager.findFragmentById(R.id.placeholder);
if(saveNewsFragment == null) {
NewsFragment newsFragment = new NewsFragment();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.add(R.id.placeholder, newsFragment);
fragmentTransaction.commit();
}
Hope this helps,
Chris
Esinah Mutseta
4,717 Pointsthanx Chris..i figured it out was just missing a second bracket after the commit command..