android - java.lang.IllegalStateException : while calling a method from a fragment 错误

Question

如何摆脱这个，我正在为 Fragments 使用 Google 兼容性库。我在日志猫中有以下错误。其中 MainMenuScreen 是一个 FragmentActivity。

java.lang.IllegalStateException: Activity has been destroyed
at android.support.v4.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1314)
at android.support.v4.app.BackStackRecord.commitInternal(BackStackRecord.java:541)
at android.support.v4.app.BackStackRecord.commit(BackStackRecord.java:525)

我正在尝试从 fragmentActivity 中的 fragment 调用一个方法，如下所示

MainMenuScreen objMain= new MainMenuScreen();
                    if(SharedVariables.isTablet){

                        objMain.showFragment();}else{....}

MainMenuScreen 中的方法是

public void showTrafficCasesDetails(){          
        detailsFragmentRoot.setVisibility(View.VISIBLE);            
        DetailsFrag detailsFrag=new DetailsFrag ();
        FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();       
        transaction.replace(R.id.mainScreenDetailsFrame, detailsFrag);
        transaction.commit();
    }

Answer 1

解决了...

MainMenuScreen objMain=(MainMenuScreen)getActivity(); if(SharedVariables.isTablet){

                        objMain.showFragment();}