CODEWITHSUNDEEP
androidandroid-fragmentsandroid-activity
user3137376
user3137376

Reputation: 1527

how to pass data from a java class to a fragment in android

So i have a FragmentPagerAdapater called SectionsPagerAdapter and a fragment called TeamFragment where I display data from a specific team. So basically I don't want to create different fragments for each team. That is an overkill. I just want 1 fragment which basically connects to the backend then collects the data based on the team then displays that data. But I dont know how to pass the Team name(a string type) from SectionsPagerAdapter to the TeamFragment so that in TeamFragment, I can easily know what to retrieve from the backend. My backend in parse.com. Please help me figure this out and learn. Thanks

Upvotes: 0

Views: 2820

Answers (2)

user3137376
user3137376

Reputation: 1527

So this is was solved my problem. In my sectionsPagerAdapter class i had the below code

    Bundle args = new Bundle();
    args.putString("TeamName", team);
    TeamFragment teamFragment = new TeamFragment();
    teamFragment.setArguments(args);

In onCreateView of my TeamFragment, i had the following 

Bundle bundle = this.getArguments();
    mTeam = bundle.getString("TeamName");

hope this can help someone else. Thanks

Upvotes: 1

Michael Aaron Safyan
Michael Aaron Safyan

Reputation: 95449

Communicating data into fragments is typically done through a simple setter function that is called by the activity that instantiates or contains the fragment:

public class MyActivity extends FragmentActivity {
   @Override
   protected void onCreate(Bundled savedInstanceState) {
     // ...
     TeamFragment fragment =
         (TeamFragment) (getSupportFragmentManager().findFragmentById(fragmentId));
     fragment.setTeamName(teamName);
     // ...
}

For communicating data back to the activity, is typically done using a fragment-specific "Listener" interface. This listener can be attached using the same method (by calling a method on the fragment in the parent activity to register the listener) or it can be done by requiring that the parent Activity implement the listener interface, and casting the parent activity to this listener interface in onAttach() (though the latter approach is not as clean of an approach). Example:

public class MyActivity extends FragmentActivity {
   @Override
   protected void onCreate(Bundled savedInstanceState) {
     // ...
     TeamFragment fragment =
         (TeamFragment) (getSupportFragmentManager().findFragmentById(fragmentId));
     fragment.setTeamName(teamName);
     fragment.setTeamSelectedListener(new TeamSelectedListenerImpl());
     // ...
}

Or:

public class TeamFragment extends Fragment {
   public interface TeamSelectedListener {
      // ...
   }

   // ...
   @Override
   protected void onAttach(Activity activity) {
      teamSelectedListener = (TeamSelectedListener) activity;
   }
   // ...
}

public class MyActivity
    extends FragmentActivity
    implements TeamFragment.TeamSelectedListener {
    // ...
}

Upvotes: 0

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