IllegalStateException: nicht ändern Können-tag-fragment wurde android:switcher jetzt auch android:switcher
Meine Aktivität verwendet TabLayout
+ ViewPager
.
Die Anzahl der Registerkarten und Seiten hier, sind dynamisch und abhängig von den Daten Holen vom server.
Dem Absturz berichtet über Crashlytics, ich bin nicht in der Lage zu replizieren.
Meine Tätigkeit code:
@Override
protected void onCreate(Bundle savedInstanceState) {
boolean isAppRestarting = PrefUtils.getBoolean("app_restarting", false);
if (isAppRestarting) {
super.onCreate(null);
this.savedInstanceState = null;
} else {
super.onCreate(savedInstanceState);
this.savedInstanceState = savedInstanceState;
}
initSlidingTabs();
fetchSomeData(); //see onDataFetched() below
}
private void initSlidingTabs() {
List<FragmentWithTitle> sdsTabs = new ArrayList<>();
Logger.i("There is saved instance state");
ArrayList<String> titles = savedInstanceState.getStringArrayList(TAB_TITLES);
if (titles != null) {
for (int i = 0; i < titles.size(); i++) {
if (getFragment(i) != null) {
sdsTabs.add(new FragmentWithTitle(getFragment(i), titles.get(i)));
}
}
}
mTabsAdapter = new MyTabsAdapter(getSupportFragmentManager(), sdsTabs);
mViewPager = (ViewPager) findViewById(R.id.layoutViewPagerSlidingTabs);
mViewPager.setAdapter(mTabsAdapter);
mViewPager.setOffscreenPageLimit(2);
mSlidingTabs = (TabLayout) findViewById(R.id.tabs);
mSlidingTabs.setupWithViewPager(mViewPager);
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
if (mTabsAdapter != null) {
outState.putStringArrayList(TAB_TITLES, mTabsAdapter.getTitles());
}
}
private Fragment getFragment(int position) {
return savedInstanceState == null ? mTabsAdapter.getItem(position) : getSupportFragmentManager()
.findFragmentByTag(getFragmentTag(position));
}
private String getFragmentTag(int position) {
return "android:switcher:" + R.id.layoutViewPagerSlidingTabs + ":" + position;
}
/**
Callback of fetchData() in onCreate()
*/
private void onDataFetched(List<AbcObject> abcObjects) {
if (savedInstanceState == null) {
if (abcObjects != null) {
for (AbcObject abcObject : abcObjects) {
mTabsAdapter.addTab(new FragmentWithTitle(AbcFragment.newInstance(), abcObject.getTitle()));
}
}
} else {
Logger.d("There is saved instance state");
ArrayList<String> titles = savedInstanceState.getStringArrayList(TAB_TITLES);
if (titles != null) {
for (int i = 0; i < titles.size(); i++) {
mTabsAdapter.addTab(new FragmentWithTitle(getFragment(i), titles.get(i)));
}
}
}
mTabsAdapter.notifyDataSetChanged();
}
MyTabsAdapter:
public class MyTabsAdapter extends FragmentPagerAdapter {
private List<FragmentWithTitle> mTabs = new ArrayList<>();
public MyTabsAdapter(FragmentManager fm, List<FragmentWithTitle> sdsTabs) {
super(fm);
this.mTabs = sdsTabs;
}
@Override
public Fragment getItem(int position) {
return mTabs.get(position).getFragment();
}
@Override
public CharSequence getPageTitle(int position) {
return mTabs.get(position).getTitle();
}
@Override
public int getCount() {
return this.mTabs.size();
}
public int getItemPosition(Object object) {
return POSITION_NONE;
}
/**
* Prevent java.lang.IllegalStateException Fragment no longer exists for key android:target_state: index 5
*
* @return
*/
@Override
public Parcelable saveState() {
return null;
}
public ArrayList<String> getTitles() {
ArrayList<String> titles = new ArrayList<>();
for (int i = 0; i < mTabs.size(); i++) {
titles.add((String) mTabs.get(i).getTitle());
}
return titles;
}
public void addTab(FragmentWithTitle fragmentWithTitle) {
mTabs.add(fragmentWithTitle);
}
}
Vollständigen stacktrace:
Fatal Exception: java.lang.IllegalStateException: Can't change tag of fragment ShopFrag{4dbb6e90 #0 id=0x7f1200dd android:switcher:2131886301:0}: was android:switcher:2131886301:0 now android:switcher:2131886301:9
at android.support.v4.app.BackStackRecord.doAddOp(BackStackRecord.java:444)
at android.support.v4.app.BackStackRecord.add(BackStackRecord.java:426)
at android.support.v4.app.FragmentPagerAdapter.instantiateItem(FragmentPagerAdapter.java:103)
at android.support.v4.view.ViewPager.addNewItem(ViewPager.java:1038)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1252)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1120)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1646)
at android.view.View.measure(View.java:17396)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5365)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1410)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:17396)
at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:1081)
at android.view.View.measure(View.java:17396)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5365)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:139)
at android.view.View.measure(View.java:17396)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5365)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1410)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:17396)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5365)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:17396)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5365)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1410)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:17396)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5365)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2505)
at android.view.View.measure(View.java:17396)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2175)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1316)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1513)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1200)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6401)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:803)
at android.view.Choreographer.doCallbacks(Choreographer.java:603)
at android.view.Choreographer.doFrame(Choreographer.java:573)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:789)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5335)
at java.lang.reflect.Method.invokeNative(Method.java)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
at dalvik.system.NativeStart.main(NativeStart.java)
FragmentWithTitle:
public class FragmentWithTitle {
public FragmentWithTitle(Fragment mFragment, CharSequence mTitle) {
this.fragment = mFragment;
this.title = mTitle;
}
public Fragment getFragment() {
return fragment;
}
public void setFragment(Fragment fragment) {
this.fragment = fragment;
}
public CharSequence getTitle() {
return title;
}
public void setTitle(CharSequence title) {
this.title = title;
}
private Fragment fragment;
private CharSequence title;
}
- Klingt so ähnlich wie: Can nicht ändern-tag-fragment-Fehler - Versuch, eine PagerAdapter zum schalten.
- Ich weiß, gelesen, aber ich kann nicht gelten, dass alles von der Antwort @Tigger
- Bitte fügen Sie Ihrer Klasse
FragmentWithTitle
- Lesen Sie diesen Artikel...Sie können sich mit einigen workaround medium.com/@ali.muzaffar/...
- danke @PN10, aber es hat nichts mit meinem problem zu tun
- Kann die person, die downvoted meine Frage nach vorne kommen, mit einem Kommentar bitte?
Du musst angemeldet sein, um einen Kommentar abzugeben.
Den
FragmentPagerAdapter
schon caches, dieFragments
für Sie. Jedes fragment erhält einen tag, und dann dieFragmentPagerAdapter
anzurufen versuchtfindFragmentByTag
. Es können nur Anrufe getItem() wenn das Ergebnis ausfindFragmentByTag
istnull
.Sie wahrscheinlich diese Fehlermeldung bekommen, denn Sie sind das hinzufügen der gleichen fragment-Instanz der Liste. Sollten Sie eine neue Instanz für jede Seite.
Beispiel Formular Dokument :
Finden :FragmentPagerAdapter
Haupt-thread : Abrufen, die ein Fragment von einem ViewPager