Going back to the last fragment using the backbutton

Question

I want to go from FragmentB back to FragmentA. Can anyone please show me how to do that? The back button just closes my application. I want to return to the previous fragment instead. Here are my codes:

FragA

public class FragA extends Fragment {

    final String[] items = new String[]{"F1", "F2", "F3"
    };

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.layout, container, false);

        ListView list = (ListView) view.findViewById(R.id.fir);
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, items);
        list.setAdapter(adapter);

        list.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                                    long arg3) {

                Fragment myFragment = null;
                switch (arg2){
                    case 0:
                        myFragment = new FragA();
                        break;
                    case 1:
                        myFragment = new FragB();
                        break;
                    case 2:
                        myFragment = new FragC();
                        break;

                }
                // update the main content by replacing fragments
                FragmentManager fragmentManager = getActivity().getSupportFragmentManager();

                fragmentManager.beginTransaction()
                        .replace(R.id.container2, myFragment)

                        .commit();
                fragmentManager.popBackStackImmediate();
            }

        });
        return view;
    }




}

FragB

public class First_frag extends Fragment {

    final String[] items = new String[]{"F1", "F2", "F3", "F4","F5"
    };

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.lay, container, false);

        ListView list = (ListView) view.findViewById(R.id.fir);
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, items);
        list.setAdapter(adapter);

        list.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                                    long arg3) {

                Fragment myFragment = null;
                switch (arg2) {
                    case 0:
                        myFragment = new FragA();
                        break;
                    case 1:
                        myFragment = new FragB();
                        break;
                    case 2:
                        myFragment = new FragC();
                        break;
                    case 3:
                        myFragment = new FragD();
                        break;
                    case 4:
                        myFragment = new FragE();

                        break;

                }
                // update the main content by replacing fragments
                FragmentManager fragmentManager = getActivity().getSupportFragmentManager();

                fragmentManager.beginTransaction()

                        .replace(R.id.container3, myFragment)

                        .commit();


            }

        });
        return view;
    }



}

Thanks for any help in advance. I apologize for any possible mistakes I've made here. I'm new to programming in Android.

You just need to add the fragments to the backstack. Clicking back button will pop those form the stack and work the way as you have mentioned — Raghunandan, Sep 08 '15 at 07:02
Where do you attach fragment to the activity in activity class!. — Raghunandan, Sep 08 '15 at 07:05
You can check the answer here http://stackoverflow.com/questions/7992216/android-fragment-handle-back-button-press?rq=1 — Ankur Kumar, Sep 08 '15 at 07:05

score 0 · Answer 1 · answered Sep 08 '15 at 07:10

simply in your Activity override backPressed() method:

     @Override
     public void onBackPressed() {
       if (getSupportFragmentManager().getBackStackEntryCount() > 0) {
           getSupportFragmentManager().popBackStack();
       }
       super.onBackPressed();
     }

and remove line in FragmentA class:

   fragmentManager.popBackStackImmediate();

Going back to the last fragment using the backbutton

1 Answers1