how to customize the system back button inside fragment

[antoniomerlin]

Hey, its a nice library thnks for it.
Can you please provide me example for how i can listen for system back button inside a fragment.

[mr-chengwangyong]

Hello, thank you for your attention, because you need to listen to the return key to recover the page, so provides an interface keyBack, you can use it
SetKeyCallBack (KeyCallBack new) {
@OverRide
Boolean onKeyDown public (keyCode int, event KeyEvent) {
False return;
}
});

[antoniomerlin]

Thank you for your response just if possible can you elaborate the interface for how to implement it. As i am creating root activity from that opening a fragment and from that fragment opening new fragment and as on system backpressed i m returning to previous fragment and again on back pressed i want to display a dialog. In short i want to display over last fragment when user press system back button