Rewriting the Fragment in the onKeyEvent () method, to achieve the effect of the return key, click the back button but nothing happens. Seek solutions.

            
Rewriting the Fragment in the onKeyEvent () method, to achieve the effect of the return key, click the back button but nothing happens. Seek solutions.
Reply:
fragment is dependent activity, realize onkeydown in activity in
Reply:
fragment need not add event listeners to return what it
unified managementYou have to listen to modify the onkeydown and returns false viewgroup
Reply:
ft.addToBackStack (null) ;/ / this line of code can return to the previous operation (the horizontal screen, the display that is on both sides of the lower case)
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Have solved it!