1 java.lang.IllegalStateException: Activity has been destroyed 2     at android.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1295) 3     at android.app.BackStackRecord.commitInternal(BackStackRecord.java:552) 4     at android.app.BackStackRecord.commit(BackStackRecord.java:536) 5     at com.tongyan.subway.inspect.act.HistoryManageAct.createFragment(HistoryManageAct.java:1021) 6     at com.tongyan.subway.inspect.act.HistoryManageAct.handleOtherMessage(HistoryManageAct.java:338) 7     at com.tongyan.tfinal.MFinalActivity$MHandler.handleMessage(MFinalActivity.java:558) 8     at android.os.Handler.dispatchMessage(Handler.java:99) 9     at android.os.Looper.loop(Looper.java:137)10     at android.app.ActivityThread.main(ActivityThread.java:4823)11     at java.lang.reflect.Method.invokeNative(Native Method)12     at java.lang.reflect.Method.invoke(Method.java:511)13     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:787)14     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:554)15     at dalvik.system.NativeStart.main(Native Method)