android - Fatal Exception: java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState -

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i show dialogfragment inside button onclick event below:

public void  onbuttonclick() {     mydialogfragment.show(getsupportfragmentmanager(), "dialog"); }

why cause illegalstateexception, may called after onsaveinstancestate? here log:

fatal exception: java.lang.illegalstateexception: can not perform action after onsaveinstancestate    @ android.support.v4.app.fragmentmanagerimpl.checkstateloss(fragmentmanager.java:1377)    @ android.support.v4.app.fragmentmanagerimpl.enqueueaction(fragmentmanager.java:1395)    @ android.support.v4.app.backstackrecord.commitinternal(backstackrecord.java:637)    @ android.support.v4.app.backstackrecord.commit(backstackrecord.java:616)    @ android.support.v4.app.dialogfragment.show(dialogfragment.java:139)    @ com.a.b.afragment.editsex(afragment.java:226)    @ com.a.b.afragment.access$200(afragment.java:46)    @ com.a.b.afragment$3.onbuttonclick(afragment.java:134)

inside show method call 

fragmenttransaction.commitallowingstateloss()

after adding fragment 

fragmenttransaction.add();

for reference

like commit allows commit executed after activity's state saved. dangerous because commit can lost if activity needs later restored state, should used cases okay ui state change unexpectedly on user.


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