Android : Hiding action bar in fragment -

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i have 2 fragments mainfragment , childfragment. want show actionbar in mainfragment wants hide in childfragment. working fine except when comes mainfragment childfragment , again goes childfragment action bar shows seconds before hidden ..

i don't know why ? help

in childfragment doing this

@override public void onresume() {     super.onresume();     ((actionbaractivity) getactivity()).getsupportactionbar().hide();     mainactivity.mdrawerlayout.setdrawerlockmode(drawerlayout.lock_mode_locked_closed);     getview().setfocusableintouchmode(true);     getview().requestfocus();     getview().setonkeylistener(new view.onkeylistener() {         @override         public boolean onkey(view v, int keycode, keyevent event) {              if (event.getaction() == keyevent.action_up && keycode == keyevent.keycode_back) {                 // handle button's click listener                  mainactivity.onbackpressed();                 ((actionbaractivity) getactivity()).getsupportactionbar().show();                 mainactivity.mdrawerlayout.setdrawerlockmode(drawerlayout.lock_mode_unlocked);                 return true;             }             return false;         }     }); }

you should handle transitions in main activity... there should handle logic according needs - such hiding/showing action bar , such...


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