android - onKeyDown inside custom viewPager that has been added through code in an activity -

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there 1 activity in loading 1 layout , on click event adding viewpager calling addview(customviewpagerinstance)

customviewpagerinstance contains 3 separate type of custom views. want handle onkeydown method separately each type of view , handle separately on activity itself.

i have implemented onkeydown() in activity : 

@overrride onkeydown(int keycode, keyevent event) {    if(keycode==keyevent.keycode_back){      if(viewpageradded) return false;      else //dobackbuttonprocessingofactivity return true;      }    else return false; }

and on 3 custom views : 

@overrride onkeydown(int keycode, keyevent event) {   if(keycode==keyevent.keycode_back){    { if(viewpageradded) //dobackbuttonprocessingofcustomview return true;      else return false;     }    else return false; }

and setting setfocusable(true) , setfocusableintouchmode()the in customview constructor still onkeydown() of customview not triggered.

--any appreciated.


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