ContactListFragmentListener Interface and ContactListFragment Instance Variables
Figure 8.25 begins class ContactListFragment
’s declaration. Lines 23–30 declare the nested interface ContactListFragmentListener
, which contains the callback methods that MainActivity
implements to be notified when the user selects a contact (line 26) and when the user touches the menu item to add a new contact (line 29). Line 32 declares instance variable listener
which will refer to the object (MainActivity
) that implements the interface. Instance variable contactListView
(line 34) will refer to the ContactListFragment
’s builtin ListView
, so we can interact with it programmatically. Instance variable contactAdapter
will refer to the CursorAdapter
that populates ...
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