How can I communicate/pass data through different Fragments with Swipe Tab?

Question

Hi I have a Swipe Tab Fragment Activity that contains Three Fragments. I created my own adapter that extends FragmentStatePageAdapter.

Now here I\'ll explain how each ta

Answer 1

what I usually do is:

1.- Define the interface. It's done, fine.

2.- Your FragmentGeneralSymptoms must have an initializated listener. Yuou're that but you forgot to set the listener in the class.

public class FragmentGeneralSymptoms extends ListFragment implements OnItemClickListener {
    ArrayList<String> symptomList;
    String name;
    String selected;
    Tray tray;

    (your code)

    public void setTrayListener(Tray listener)
    {
        tray = listener;
    }

    @Override
    public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
        // TODO Auto-generated method stub
        selected = symptomList.get(arg2);
        if(tray != null)
        {
           symptomList.remove(selected); // if you want to remove this element from this list
           tray.respond(selected);
        }
    } }

3.- Your FragmentTray class must implement the interface:

public class FragmentTray extends ListFragment implements Tray{
private ArrayList<String> selectedList;

public FragmentTray(){}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    return inflater.inflate(R.layout.fragment_tray, container, false);
}

public void addToTray(String symptom){
    selectedList.add(symptom);
    setListAdapter(new ArrayAdapter<String>(getActivity(),
            R.layout.general_list, selectedList));
}

public void removeSymptom(String string){
    selectedList.remove(selectedList.indexOf(string));
}

public void respond(String name)
{

// do stuffs!!!!
selectedList.add(new Symtom(name)); // for example
System.out.println("Inside the respond method respond in FragmentTray class");

}
}

4.- And last but not least. When you build the fragments you must register the listener:

class MyAdapter extends FragmentStatePagerAdapter {

    private List<Fragment> fragmentList;

    public MyAdapter(FragmentManager fm) {
        super(fm);
        // TODO Auto-generated constructor stub
        fragmentList = new ArrayList<Fragment>();

        Fragment fragmentBodyPart = new FragmentBodyPart();
        Fragment fragmentTray = new FragmentTray();
        Fragment fragmentGeneralSymptoms = new FragmentGeneraSymptoms();

        // this is important*********************************
        fragmentGeneraSmptoms.setTrayListener(fragmentTray);

        fragmentList.add(fragmentBodyPart);
        fragmentList.add(fragmentGeneralSymptoms);
        fragmentList.add(fragmentTray);
    }

    @Override
    public Fragment getItem(int arg0) {
        // TODO Auto-generated method stub
        Fragment fragment = null;
        Bundle bundle = new Bundle();
        bundle.putString("key", selectedProfileName);
        if (arg0 == 0) {
            fragment = (Fragment) fragmentList.get(0);
            fragment.setArguments(bundle);
        }
        if (arg0 == 1) {
            fragment = (Fragment) fragmentList.get(1);
            fragment.setArguments(bundle);
        }
        if (arg0 == 2) {
            fragment = (Fragment) fragmentList.get(2);
        }
        return fragment;
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return fragmentList.size();
    }

}

I hope that it helps.