implementa OnScrollListener dentro de listFragment

Implementé OnScrollListener interfaz en ListFragment, y quiero cambiar el texto cuando el último elemento de la lista es visible, pero no funciona. No encontré el ejemplo del problema similar (OnScrollListener dentro de ListFragment). Mi ejemplo:

public class MyListFragment1 extends ListFragment implements OnScrollListener { public View view; public class MyListAdapter extends ArrayAdapter<String> { Context myContext; List<String> lista; public MyListAdapter(Context context, int textViewResourceId, List<String> objects) { super(context, textViewResourceId, objects); myContext = context; lista = objects; } @Override public View getView(int position, View convertView, ViewGroup parent) { //return super.getView(position, convertView, parent); LayoutInflater inflater = (LayoutInflater)myContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); View row=inflater.inflate(R.layout.row, parent, false); TextView label=(TextView)row.findViewById(R.id.month); label.setText(lista.get(position)); ImageView icon=(ImageView)row.findViewById(R.id.icon); //Customize your icon here icon.setImageResource(R.drawable.ic_launcher); return row; } } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); /* ListAdapter myListAdapter = new ArrayAdapter<String>( getActivity(), android.R.layout.simple_list_item_1, month); setListAdapter(myListAdapter); */ List<String> lista = new ArrayList<String>(); lista.add("January"); lista.add("February"); lista.add("March"); lista.add("April"); lista.add("May"); lista.add("June"); lista.add("July"); lista.add("August"); lista.add("September"); lista.add("October"); lista.add("November"); lista.add("December"); MyListAdapter myListAdapter = new MyListAdapter(getActivity(), R.layout.row, lista); setListAdapter(myListAdapter); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { view = inflater.inflate(R.layout.listfragment1, container, false); changeText("jestem tutaj"); return view; } private void changeText(String txt){ TextView nowy = (TextView)view.findViewById(R.id.article); nowy.setText(txt); } @Override public void onListItemClick(ListView l, View v, int position, long id) { Toast.makeText( getActivity(), getListView().getItemAtPosition(position).toString(), Toast.LENGTH_LONG).show(); } @Override public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { if (++firstVisibleItem + visibleItemCount > totalItemCount) { changeText("something"); } } @Override public void onScrollStateChanged(AbsListView view, int scrollState) { // TODO Auto-generated method stub }

No tengo ningún error, simplemente no funciona;)

Implementación PS del método onScroll que encontré en StackOverflow.

EDIT: / añadiendo logcat:

  10-14 01:11:34.944: E/AndroidRuntime(817): FATAL EXCEPTION: main 10-14 01:11:34.944: E/AndroidRuntime(817): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.exercise.AndroidListFragment/com.exercise.AndroidListFragment.AndroidListFragmentActivity}: android.view.InflateException: Binary XML file line #7: Error inflating class fragment 10-14 01:11:34.944: E/AndroidRuntime(817): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 10-14 01:11:34.944: E/AndroidRuntime(817): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 10-14 01:11:34.944: E/AndroidRuntime(817): at android.app.ActivityThread.access$600(ActivityThread.java:141) 10-14 01:11:34.944: E/AndroidRuntime(817): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 10-14 01:11:34.944: E/AndroidRuntime(817): at android.os.Handler.dispatchMessage(Handler.java:99) 10-14 01:11:34.944: E/AndroidRuntime(817): at android.os.Looper.loop(Looper.java:137) 10-14 01:11:34.944: E/AndroidRuntime(817): at android.app.ActivityThread.main(ActivityThread.java:5041) 10-14 01:11:34.944: E/AndroidRuntime(817): at java.lang.reflect.Method.invokeNative(Native Method) 10-14 01:11:34.944: E/AndroidRuntime(817): at java.lang.reflect.Method.invoke(Method.java:511) 10-14 01:11:34.944: E/AndroidRuntime(817): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 10-14 01:11:34.944: E/AndroidRuntime(817): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 10-14 01:11:34.944: E/AndroidRuntime(817): at dalvik.system.NativeStart.main(Native Method) 10-14 01:11:34.944: E/AndroidRuntime(817): Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class fragment 10-14 01:11:34.944: E/AndroidRuntime(817): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704) 10-14 01:11:34.944: E/AndroidRuntime(817): at android.view.LayoutInflater.rInflate(LayoutInflater.java:746) 10-14 01:11:34.944: E/AndroidRuntime(817): at android.view.LayoutInflater.inflate(LayoutInflater.java:489) 10-14 01:11:34.944: E/AndroidRuntime(817): at android.view.LayoutInflater.inflate(LayoutInflater.java:396) 10-14 01:11:34.944: E/AndroidRuntime(817): at android.view.LayoutInflater.inflate(LayoutInflater.java:352) 10-14 01:11:34.944: E/AndroidRuntime(817): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:270) 10-14 01:11:34.944: E/AndroidRuntime(817): at android.app.Activity.setContentView(Activity.java:1881) 10-14 01:11:34.944: E/AndroidRuntime(817): at com.exercise.AndroidListFragment.AndroidListFragmentActivity.onCreate(AndroidListFragmentActivity.java:11) 10-14 01:11:34.944: E/AndroidRuntime(817): at android.app.Activity.performCreate(Activity.java:5104) 10-14 01:11:34.944: E/AndroidRuntime(817): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 10-14 01:11:34.944: E/AndroidRuntime(817): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 10-14 01:11:34.944: E/AndroidRuntime(817): ... 11 more 10-14 01:11:34.944: E/AndroidRuntime(817): Caused by: java.lang.IllegalStateException: Content view not yet created 10-14 01:11:34.944: E/AndroidRuntime(817): at android.app.ListFragment.ensureList(ListFragment.java:386) 10-14 01:11:34.944: E/AndroidRuntime(817): at android.app.ListFragment.getListView(ListFragment.java:280) 10-14 01:11:34.944: E/AndroidRuntime(817): at com.exercise.AndroidListFragment.MyListFragment1.onCreateView(MyListFragment1.java:93) 10-14 01:11:34.944: E/AndroidRuntime(817): at android.app.Fragment.performCreateView(Fragment.java:1695) 10-14 01:11:34.944: E/AndroidRuntime(817): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:861) 10-14 01:11:34.944: E/AndroidRuntime(817): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1035) 10-14 01:11:34.944: E/AndroidRuntime(817): at android.app.FragmentManagerImpl.addFragment(FragmentManager.java:1137) 10-14 01:11:34.944: E/AndroidRuntime(817): at android.app.Activity.onCreateView(Activity.java:4717) 10-14 01:11:34.944: E/AndroidRuntime(817): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:680) 10-14 01:11:34.944: E/AndroidRuntime(817): ... 21 more

EDIT 2: He intentado findViewById pero no funciona demasiado ….

Ha implementado OnScrollListener, pero no lo ha adjuntado a su ListView.

 getListView().setOnScrollListener(this);

agregue esto a su método onCreateView.

Tiene este error porque está intentando tener acceso a su ListView cuando éste aún no se ha creado.

Causado por: java.lang.IllegalStateException: Vista de contenido aún no creada

Su ListView es realmente creado por la última línea de su método onCreateView, en la línea que por lo general se parece a algo así:

 return inflater.inflate(R.layout.fragment_list, container, false);

La solución es acceder a su lista desde el método onActivityCreated, que se ejecuta justo después del método onCreateView.

  @Override public void onActivityCreated (Bundle savedInstanceState){ // Always call the superclass so it can save the view hierarchy state super.onCreate(savedInstanceState); getListView().setOnScrollListener(this); }