Passing ArrayList from Fragment class to Activity

Question

I have main fragment and I want to pass ArrayList to Activity class, where I will show the result in ListView.

Fragment class:

Answer 1

Create an custom interface in your Fragment:

public interface OnFragmentInteractionListener {    
    public void onFragmentSetStudents(ArrayList<Student>);         
}

Implement this interface in your Activity:

public class YourActivity extends Activity implements YourFragment.OnFragmentInteractionListener {
   private ArrayList<Student> allStudents;
}

Now you have to override the declared method (in your Activity):

@Override
public void onFragmentSetStudents(ArrayList<Student> students) {
  allStudents = students;
}

Then you just have to start this method with an Listener in your Fragment:

OnFragmetInteractionListener listener = (OnFragmentInteractionListener) activity;
listener.onFragmentStudents(allStudents)

Answer 2

In your Activity:

Bundle bundle = getIntent().getExtras(); 
ArrayList allStudents = bundle.get("ExtraData");

and I think you need to define your ArrayAdapter as:

arrayAdapter = new ArrayAdapter<Student>(this, R.layout.student_list, allStudents);

You have the rest of the code, just add the above. It should work.