How to set onBackPress in Fragment on Android -


in application use viewpager show 2 fragments activity.
in 1 of fragments use navigationdrawer, want when click on onbackpress close navigationdrawer.

i write below code open drawer : 

reviewserialfrag_drawerlayout.opendrawer(gravity.end);

i want when click on onbackpress close drawer below code : 

reviewserialfrag_drawerlayout.closedrawer(gravity.end);

how can it? please me

/try use below code snipet/    @override   public void onbackpressed()   {  int count = getfragmentmanager().getbackstackentrycount();  // count --> current fragment   if (count == 0)  {     if(reviewserialfrag_drawerlayout.isdrawervisible(gravitycompat.end))     {         reviewserialfrag_drawerlayout.closedrawer(gravitycompat.end);     }  }    }

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