問題與getSupportFragmentManager（）。putFragment

Question

我正在開發一個android應用程序，我想保存我的片段是在向量片段。當我在onSaveIstanceState使用putFragment系統拋出IllegalStateException異常

@Override 
    protected void onSaveInstanceState(Bundle outState) { 
     super.onSaveInstanceState(outState); 
     // Salviamo lo stato 


     //salvo all fragment 
     for(int i=0;i<fragments.size();i++) 
      getSupportFragmentManager().putFragment(outState, Integer.toString(i), fragments.get(i)); 

    } 

這是logcat的：

09-13 10:38:10.230: E/AndroidRuntime(24089): java.lang.IllegalStateException: Fragment GenericPageFragment{417716e0} is not currently in the FragmentManager 
09-13 10:38:10.230: E/AndroidRuntime(24089): at android.support.v4.app.FragmentManagerImpl.putFragment(FragmentManager.java:516) 
09-13 10:38:10.230: E/AndroidRuntime(24089): at it.intects.dashboard.droid.BaseActivity.onSaveInstanceState(BaseActivity.java:180) 
09-13 10:38:10.230: E/AndroidRuntime(24089): at android.app.Activity.performSaveInstanceState(Activity.java:1113) 
09-13 10:38:10.230: E/AndroidRuntime(24089): at android.app.Instrumentation.callActivityOnSaveInstanceState(Instrumentation.java:1188) 

爲什麼？我該如何解決這個錯誤？

Answer 1

調用savedInstanceState（）後，您無法執行任何片段事務。

活動將在活動返回時恢復最後附加的片段。

如果你想要做的與片段的任何行動使用：

getSupportFragmentManager().beginTransaction().add(R.layout.container,new MyFragment(), "fragment_tag").commit(); 

A very good tutorial about fragments