你可以使用FragmentActivity。onStart在popBackStackImmediate之前

是这样的:

public void backStackFragment() {
    this.start();
    getFragmentManager().popBackStackImmediate();
}

public void start(){
    FragmentActivity a = getActivity();
    if(a instanceof DepositPlanPadActivity){
      ((DepositPlanPadActivity)a).onStart();
    }
    if(a instanceof SmallChangePlanPad){
            ((SmallChangePlanPad)a).onStart();
        }
        if(a instanceof UserCenterActivity){
            ((UserCenterActivity)a).onStart();
        }
    }

http://jorryliu.blogspot.com/2014/09/illegalstateexception-can-not-perform.html

经过研究，这个问题的解决方案是做你的片段提交在onresume。

来源:https://wenchaojames.wordpress.com/2013/01/12/illegalstateexception-from-onactivityresult/

如果你试图在你的片段活动的onSaveInstanceState()被调用后执行片段转换，就会发生这样的异常。

发生这种情况的一个原因是，当一个活动停止时，如果你让一个AsyncTask(或线程)运行。

调用onSaveInstanceState()后的任何转换都可能丢失，如果系统回收活动的资源并稍后重新创建它。

只需在显示你的片段之前调用super.onPostResume()，或者在调用super.onPostResume()之后在onPostResume()方法中移动你的代码。这就解决了问题!

这对我很管用……我自己发现的…希望对你有所帮助!

1)不要有全局的“静态”FragmentManager / FragmentTransaction。

2) onCreate，总是初始化FragmentManager再次!

样本如下:-

public abstract class FragmentController extends AnotherActivity{
protected FragmentManager fragmentManager;
protected FragmentTransaction fragmentTransaction;
protected Bundle mSavedInstanceState;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mSavedInstanceState = savedInstanceState;
    setDefaultFragments();
}

protected void setDefaultFragments() {
    fragmentManager = getSupportFragmentManager();
    //check if on orientation change.. do not re-add fragments!
    if(mSavedInstanceState == null) {
        //instantiate the fragment manager

        fragmentTransaction = fragmentManager.beginTransaction();

        //the navigation fragments
        NavigationFragment navFrag = new NavigationFragment();
        ToolbarFragment toolFrag = new ToolbarFragment();

        fragmentTransaction.add(R.id.NavLayout, navFrag, "NavFrag");
        fragmentTransaction.add(R.id.ToolbarLayout, toolFrag, "ToolFrag");
        fragmentTransaction.commitAllowingStateLoss();

        //add own fragment to the nav (abstract method)
        setOwnFragment();
    }
}

Android 4.2和支持库的源代码中修正了这个问题。[*]

有关原因(和解决方案)的详细信息，请参阅谷歌错误报告: http://code.google.com/p/android/issues/detail?id=19917

如果你正在使用支持库，那么你不应该担心这个错误(很长时间)[*]。然而，如果你直接使用API(即不使用支持库的FragmentManager)，并针对Android 4.2以下的API，那么你将需要尝试一种变通方法。

[*]在撰写本文时，Android SDK管理器仍在分发显示此错误的旧版本。

编辑，我要在这里补充一些澄清，因为我显然把投票反对这个答案的人弄糊涂了。

There are several different (but related) circumstances that can cause this exception to be thrown. My answer above is referring to the specific instance discussed in the question i.e. a bug in Android which has subsequently been fixed. If you're getting this exception for another reason it's because you're adding/removing fragments when you shouldn't be (after fragment states have been saved). If you're in such a situation then perhaps "Nested Fragments - IllegalStateException “Can not perform this action after onSaveInstanceState”" can be of use to you.