Android™ How to Program, Second Edition

DetailsFragment Overridden Methods onAttach and onDetach

Class DetailsFragment overrides Fragment lifecycle methods onAttach and onDetach (Fig. 8.44) to set instance variable listener when the DetailsFragment is attached and detached, respectively.

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45      // set DetailsFragmentListener when fragment attached46      @Override47      public void onAttach(Activity activity)48      {49         super.onAttach(activity);50         listener = (DetailsFragmentListener) activity;51      }52 53      // remove DetailsFragmentListener when fragment detached54      @Override55      public void onDetach()56      {57         super.onDetach();58         listener = null;59      }60

Fig. 8.44 | DetailsFragment overridden methods ...