Pracuję z fragmentami i przesuwaniem nowych fragmentów na backstackach, ale kiedy obracam urządzenie dwukrotnie w stosunku do fragmentu o onCreateView
, onActivityCreated
itd. W cyklu fragmentu metody nigdy nie są nazywane odejściem pusty ekran. Dzieje się tak tylko wtedy, gdy fragment został dodany do backstack lub powrócił do pierwszego fragmentu w backstack.Fragment onCreateView i onActivityCreated nie są wywoływane przy obrocie
Oto metody manipulacyjne fragment mojej działalności jest:
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Injection
MormonChannel.injectActivity(this);
setDrawerIndicatorEnabled(true);
// Do not set currentNavigationItem here.
NavigationItemSelectedEvent.NavigationItem navItem = null;
Intent intent = getIntent();
if (intent != null) {
navItem = (NavigationItemSelectedEvent.NavigationItem)
intent.getSerializableExtra(EXTRA_NAV_ITEM);
}
if (savedInstanceState == null) {
FragmentManager fm = getSupportFragmentManager();
fm.beginTransaction().replace(R.id.container, new FeatureListFragment()).commit();
if (navItem != null) {
onNavigationItemSelected(new NavigationItemSelectedEvent(navItem));
} else {
currentNavigationItem = NavigationItemSelectedEvent.NavigationItem.FEATURES;
}
}
}
@Subscribe
public void onNavigationItemSelected(NavigationItemSelectedEvent event) {
if (currentNavigationItem == event.getNavigationItem()) {
return;
}
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.popBackStack();
NavigationItemSelectedEvent.NavigationItem navigationItem = event.getNavigationItem();
String name = navigationItem.getName();
switch (navigationItem) {
default:
case FEATURES:
// Nothing needs to be done it is already there.
break;
case AUDIO:
fragmentManager.beginTransaction().replace(R.id.container,
CollectionListFragment.newInstance(prefs.getLanguageId(), prefs.getAudioCollectionId()))
.addToBackStack
(name).commit();
break;
case VIDEO:
fragmentManager.beginTransaction().replace(R.id.container,
CollectionListFragment.newInstance(prefs.getLanguageId(), prefs.getVideoCollectionId()))
.addToBackStack(name).commit();
break;
case RADIO:
fragmentManager.beginTransaction().replace(R.id.container,
CollectionListFragment.newInstance(prefs.getLanguageId(), prefs.getRadioCollectionId()))
.addToBackStack(name).commit();
break;
case HISTORY:
fragmentManager.beginTransaction().replace(R.id.container, new HistoryFragment()).addToBackStack(name).commit();
break;
case DOWNLOADS:
fragmentManager.beginTransaction().replace(R.id.container, new DownloadsFragment()).addToBackStack(name).commit();
break;
case PLAYLISTS:
fragmentManager.beginTransaction().replace(R.id.container, new PlaylistFragment()).addToBackStack(name).commit();
break;
}
currentNavigationItem = navigationItem;
}
Oto mój kod CollectionListFragment:
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
MormonChannel.injectFragment(this);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.collection_list_fragment, container, false);
ButterKnife.inject(this, v);
return v;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
listView.setDividerHeight(0);
listView.setFastScrollEnabled(true);
Bundle args = getArguments();
if (args != null) {
languageId = args.getLong(ARG_LANGUAGE_ID, -1L);
collectionId = args.getLong(ARG_COLLECTION_ID, -1L);
if (args.containsKey(ARG_SORT)) {
sort = (Sort) args.getSerializable(ARG_SORT);
}
}
if (collectionId == -1L || languageId == -1L) {
// TODO Implement Empty Collection Text
} else {
collection = collectionManager.findByCollectionId(languageId, collectionId);
getLoaderManager().initLoader(LOADER_ID, null, this);
}
titleEvent = new TitleChangeEvent(collection != null ? collection.getTitle() : getString(R.string.app_name));
bus.post(titleEvent);
}
Oczywisty aktywności:
<activity
android:name=".activity.MainActivity"
android:launchMode="singleTask">
<meta-data
android:name="android.app.default_searchable"
android:value=".activity.SearchActivity"/>
</activity>
Wykład ten może pomóc: http://stackoverflow.com/questions/8474104/android-fragment-lifecycle-over-orientation-changes ma kilka fajnych odpowiedzi wyjaśniających – shkschneider
Biorę to pod uwagę za pomocą mojej metody onCreate . – Ge3ng
Nie masz elementu "configChanges" dla swojej Aktywności w swoim Manifeście? To uniemożliwiłoby ponowne odtworzenie działania na rotacie. – NasaGeek