java.lang.IllegalStateException: impossibile eseguire questa azione dopo onSaveInstanceState, FragmentTabHost

Question

MainActivity ha un FragmentTabHost e cinque frammenti si aggiungono a questo FragmentTabHost. Ecco il codice di inizializzazione

protected void onCreate(Bundle savedInstanceState) { 
     mFragmentManager = getSupportFragmentManager(); 
     mTabHost = (FragmentTabHost) findViewById(android.R.id.tabhost); 
     mTabHost.setup(this, mFragmentManager, android.R.id.tabcontent); 
     // Home 
     mTabHost.addTab(
       mTabHost.newTabSpec(TAB_TAG_HOME).setIndicator(
         newTabItem(R.drawable.mi_selector_tab_home, 
           R.string.mi_tab_item_milian)), 
       TabFateFragment.class, null); 

     // Serach 
     mTabHost.addTab(
       mTabHost.newTabSpec(TAB_TAG_SEARCH).setIndicator(
         newTabItem(R.drawable.mi_selector_tab_search, 
           R.string.mi_navi_title_search)), 
       TabSearchFragment.class, null); 

     // Msg 
     mTabHost.addTab(
       mTabHost.newTabSpec(TAB_TAG_MSG).setIndicator(
         newTabItem(R.drawable.mi_selector_tab_msg, 
           R.string.mi_navi_title_msg)), 
       TabMsgFragment.class, null); 

     // Nearby 
     mTabHost.addTab(
       mTabHost.newTabSpec(TAB_TAG_NEARBY).setIndicator(
         newTabItem(R.drawable.mi_selector_tab_nearby, 
           R.string.mi_navi_title_nearby)), 
       TabNearbyFragment.class, null); 

     // Me 
     mTabHost.addTab(
       mTabHost.newTabSpec(TAB_TAG_ME).setIndicator(
         newTabItem(R.drawable.mi_selector_tab_me, 
           R.string.mi_navi_title_me)), 
       TabMeFragment.class, null); 
     ...... 
} 

e ho letto questo article, non trovare FragmentTransaction # commit() nel mio codice.

E ho cercato di non chiamare super.onSaveInstanceState (Bundle Outstate) nel mio Activity.onSaveInstanceState (Outstate)

@Override 
    protected void onSaveInstanceState(Bundle outState) { 
     // super.onSaveInstanceState(outState); 
    } 

Ecco il registro incidente

java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState 
    at android.support.v4.app.FragmentManagerImpl.checkStateLoss(Unknown Source) 
    at android.support.v4.app.FragmentManagerImpl.enqueueAction(Unknown Source) 
    at android.support.v4.app.BackStackRecord.commitInternal(Unknown Source) 
    at android.support.v4.app.BackStackRecord.commit(Unknown Source) 
    at android.support.v4.app.FragmentTabHost.onAttachedToWindow(Unknown Source) 
    at android.view.View.dispatchAttachedToWindow(View.java:12134) 
    at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2453) 
    at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2460) 
    at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2460) 
    at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2460) 
    at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2460) 
    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1207) 
    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1004) 
    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5483) 
    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:778) 
    at android.view.Choreographer.doCallbacks(Choreographer.java:591) 
    at android.view.Choreographer.doFrame(Choreographer.java:561) 
    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:764) 
    at android.os.Handler.handleCallback(Handler.java:730) 
    at android.os.Handler.dispatchMessage(Handler.java:92) 
    at android.os.Looper.loop(Looper.java:137) 
    at android.app.ActivityThread.main(ActivityThread.java:5109) 
    at java.lang.reflect.Method.invokeNative(Native Method) 
    at java.lang.reflect.Method.invoke(Method.java:525) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
    at dalvik.system.NativeStart.main(Native Method) 

Answer 1

È necessario chiamare setup () prima di utilizzare addTab(): http://developer.android.com/reference/android/support/v4/app/FragmentTabHost.html

Answer 2

The onSaveInstanceState m ethod viene chiamato prima che l'attività stia per essere distrutta, per salvare i dati di Activity. Fa sì che l'errore aggiunga Fragment ad esso dopo che i dati sono stati salvati. La soluzione è di sostituire il metodo commit() con commitAllowingStateLoss(), e l'effetto è la stessa.

Answer 3

Utilizzando Framelayout:

<FrameLayout 

      android:id="@+id/tab_content" 

      android:layout_width="match_parent" 

      android:layout_height="match_parent" 

      android:layout_gravity="bottom" 

      android:orientation="vertical" /> 

e aggiungere un metodo: il metodo

private synchronized void replaceFragment() { 



     FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction(); 

     // Workaround for Issue 42601: 

     // https://code.google.com/p/android/issues/detail?id=42601 

     fragmentTransaction.detach(tabFragments[previousTabIdx]).replace(R.id.tab_content, tabFragments[curTabIdx]) 

       .attach(tabFragments[curTabIdx]).commitAllowingStateLoss(); 

     previousTabIdx = curTabIdx; 

    } 

quindi è possibile utilizzare commitAllowingStateLoss().