Sort the Contacts List
The next task is to code the ContactListActivity to sort the contact list according to the preferences set by the user. The first step is to modify the getContacts method in ContactDataSource. The method needs to be modified to accept the sort field and sort order as parameters and use these parameters in the SQL to perform the actual sort. Switch to ContactDataSource.java and locate the getContacts method. Change the message signature from
public ArrayList<Contact> getContacts() {
to
public ArrayList<Contact> getContacts(String sortField, String sortOrder) {
Next, change the SQL statement from
String query = "SELECT * FROM contact ...
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