go from one fragment to another when selecting an item from a ListView

2

When executing and doing click on the item of listview the app is closed. Any ideas to solve this?

The list is in a fragment, and I want to go to another fragment

I leave my code

public class DiezFrut extends Fragment {
    // TODO: Rename parameter arguments, choose names that match
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
    private static final String ARG_PARAM1 = "param1";
    private static final String ARG_PARAM2 = "param2";

    // TODO: Rename and change types of parameters
    private String mParam1;
    private String mParam2;

    private OnFragmentInteractionListener mListener;

    public DiezFrut() {
        // Required empty public constructor
    }

    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     * @param param1 Parameter 1.
     * @param param2 Parameter 2.
     * @return A new instance of fragment DiezFrut.
     */
    // TODO: Rename and change types and number of parameters
    public static DiezFrut newInstance(String param1, String param2) {
        DiezFrut fragment = new DiezFrut();
        Bundle args = new Bundle();
        args.putString(ARG_PARAM1, param1);
        args.putString(ARG_PARAM2, param2);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_PARAM1);
            mParam2 = getArguments().getString(ARG_PARAM2);
        }
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view;
        view = inflater.inflate(R.layout.fragment_diez_frut, container, false);
        ListView dfrutas;
        String [] frutas;

        dfrutas = (ListView)view.findViewById(R.id.DiezFrutas);
        frutas=getResources().getStringArray(R.array.Diezfrutas);

        ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(getActivity(),android.R.layout.simple_list_item_1,frutas);
        dfrutas.setAdapter(arrayAdapter);

        dfrutas.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {

                 switch(i)
                {
                    case 0:getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.content_main,new Uno_Cerezas()).commit();
break;
                }
            }
        });

        return view;



    }

    // TODO: Rename method, update argument and hook method into UI event
    public void onButtonPressed(Uri uri) {
        if (mListener != null) {
            mListener.onFragmentInteraction(uri);
        }
    }

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
        if (context instanceof OnFragmentInteractionListener) {
            mListener = (OnFragmentInteractionListener) context;
        } else {
            throw new RuntimeException(context.toString()
                    + " must implement OnFragmentInteractionListener");
        }
    }

    @Override
    public void onDetach() {
        super.onDetach();
        mListener = null;
    }



    /**
     * This interface must be implemented by activities that contain this
     * fragment to allow an interaction in this fragment to be communicated
     * to the activity and potentially other fragments contained in that
     * activity.
     * <p>
     * See the Android Training lesson <a href=
     * "http://developer.android.com/training/basics/fragments/communicating.html"
     * >Communicating with Other Fragments</a> for more information.
     */
    public interface OnFragmentInteractionListener {
        // TODO: Update argument type and name
        void onFragmentInteraction(Uri uri);
    }
}

class Uno_Cerezas

public class Uno_Cerezas extends Fragment {

    private OnFragmentInteractionListener mListener;

    public Uno_Cerezas() {
        // Required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_uno__cerezas, container, false);
    }

    // TODO: Rename method, update argument and hook method into UI event
    public void onButtonPressed(Uri uri) {
        if (mListener != null) {
            mListener.onFragmentInteraction(uri);
        }
    }

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
        if (context instanceof OnFragmentInteractionListener) {
            mListener = (OnFragmentInteractionListener) context;
        } else {
            throw new RuntimeException(context.toString()
                    + " must implement OnFragmentInteractionListener");
        }
    }

    @Override
    public void onDetach() {
        super.onDetach();
        mListener = null;
    }

    /**
     * This interface must be implemented by activities that contain this
     * fragment to allow an interaction in this fragment to be communicated
     * to the activity and potentially other fragments contained in that
     * activity.
     * <p>
     * See the Android Training lesson <a href=
     * "http://developer.android.com/training/basics/fragments/communicating.html"
     * >Communicating with Other Fragments</a> for more information.
     */
    public interface OnFragmentInteractionListener {
        // TODO: Update argument type and name
        void onFragmentInteraction(Uri uri);
    }
}
  

01-17 19: 49: 08.173 29672-29672 / com.aguila0017.fruits E / AndroidRuntime:   FATAL EXCEPTION: main                                                                          Process: com.aguila0017.fruits, PID: 29672                                                                          java.lang.RuntimeException: [email protected]   must implement OnFragmentInteractionListener                                                                              at com.aguila0017.fruits.Uno_Cerezas.onAttach (Uno_Cerezas.java:47)                                                                              at   android.support.v4.app.FragmentManagerImpl.moveToState (FragmentManager.java:1048)                                                                              at   android.support.v4.app.BackStackRecord.setLastIn (BackStackRecord.java:838)                                                                              at   android.support.v4.app.BackStackRecord.calculateFragments (BackStackRecord.java:878)                                                                              at   android.support.v4.app.BackStackRecord.run (BackStackRecord.java:719)                                                                              at   android.support.v4.app.FragmentManagerImpl.execPendingActions (FragmentManager.java:1682)                                                                              at   android.support.v4.app.FragmentManagerImpl $ 1.run (FragmentManager.java:541)                                                                              at android.os.Handler.handleCallback (Handler.java:746)                                                                              at android.os.Handler.dispatchMessage (Handler.java:95)                                                                              at android.os.Looper.loop (Looper.java:148)                                                                              at android.app.ActivityThread.main (ActivityThread.java:5443)                                                                              at java.lang.reflect.Method.invoke (Native Method)                                                                              at   com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run (ZygoteInit.java:728)                                                                              at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:618) 01-17   19: 49: 09.820 29672-29672 / com.aguila0017.fruits I / Process: Sending   signal. PID: 29672 SIG: 9

    
asked by Sergio 18.01.2017 в 00:57
source

2 answers

1

Your MainActivity has to implement OnFragmentInteractionListener . We assume that your activity extends activity, you need:

public class MainActivity extends Activity implements OnFragmentInteractionListener{

    // luego en alguna parte de MainActivity
    @Override
    void onFragmentInteraction(Uri uri){
        //lo que quieres hacer en caso de interacción
    }
    
answered by 05.04.2017 в 03:54
0

The error message indicates that you must implement OnFragmentInteractionListener :

  

must implement OnFragmentInteractionListener at com.aguila0017.fruits.Uno_Cerezas.onAttach (Uno_Cerezas.java:47) at android.support.v4.app.FragmentManagerImpl.moveToState (FragmentManager.java:1048)

Actually the problem is that this interface is not added in your Fragment class, in this case you must add it in Uno_Cerezas .

   public interface OnFragmentInteractionListener {
        // TODO: Update argument type and name
        void onFragmentInteraction(Uri uri);
    }

Update :

Thanks for your update, I see:

  

[email protected] must implement   OnFragmentInteractionListener at   com.aguila0017.fruits.Uno_Cerezas.onAttach (Uno_Cerezas.java:47)

Now ensure that MainActivity implements OnFragmentInteractionListener :

public class MainActivity extends AppCompatActivity implements OnFragmentInteractionListener{
   ...
   ...
   ...
   }

When you do this, you will be asked to implement methods, so add:

@Override
void onFragmentInteraction(Uri uri){
    ...
 }
    
answered by 18.01.2017 в 01:57