Android™ How to Program, Second Edition

4.5.7. Anonymous Inner Class That Implements the ListView’s OnItemClickListener to Display Search Results

Figure 4.24 declares and initializes instance variable itemClickListener, which refers to an anonymous inner-class object that implements interface OnItemClickListener. Line 67 (Fig. 4.20) registered itemClickListener as the ListView’s event handler that responds when the user touches an item in the ListView. Lines 131–145 override interface OnItemClickListener’s onItemClick method. The method’s arguments are:

• The AdapterView where the user touched an item. The ? in AdapterView<?> is a wildcard in Java generics indicating method onItemClick can receive an AdapterView that displays any type of data—in this case, a ListView<String>.

• The ...