Which method to override in android fragment to populate a listview -

i have activity holds fragment , fragment hold list view , button, when pressed button directs fragment b.

my question method need override in fragment when pressed button, can re-populate list view inside. or there simple way can make ?

until tried override onresume , onstart, didnt work. btw cant override button pressed in fragment b because in case cant reach ui components in fragment b , getting null pointer normally.

thanks in advance.

your no notice when previous fragment show again. can override onbackpressed() method of fragment's parent activity this:

 @override  public void onbackpressed() {      //1.find fragment tag, tag supplied       //when using fragmenttransaction.add(int id, fragment fragment, string tag)       //the can find fragment way       //fragmenta fragment = getsupportfragmentmanager().findfragmentbytag(name)      //2.call method of it!  }