android - Handle back press on top fragment -

i have 2 fragments [a] , [b].

in fragment [a] , want ignore press have following code

view view = inflater.inflate(r.layout.fragment_confirmation, container, false);      view.setonkeylistener(new view.onkeylistener() {          @override         public boolean onkey(view v, int keycode, keyevent event) {              if (keycode == keyevent.keycode_back) {                 return true;             }              return false;         }     }); 

this works fine on fragment [a]. when add fragment [b] backstack, seems fragment [b] cannot handle press although, logic ignore press in fragment[a] . can explain strange behaviour?

try may works.override key in onresume ...

@override public void onresume() {      super.onresume();      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                     return true;                 }              return false;         }     }); }