Change:
String selection = ContactsContract.Contacts.DISPLAY_NAME + " IS NOT NULL";
to:
String constraint = "Lau";
String selection = ContactsContract.Contacts.DISPLAY_NAME + " LIKE '%" + constraint + "%'";
Related articles :
Query Contacts database, search with selection of LIKE cause.
The previous exercise demonstrate how to "Query Contacts database" for all contacts. To search for contacts with certain constraint in DISPLAY_NAME, we can modify the selection using LIKE cause.
Change:
String selection = ContactsContract.Contacts.DISPLAY_NAME + " IS NOT NULL";
to:
String constraint = "Lau";
String selection = ContactsContract.Contacts.DISPLAY_NAME + " LIKE '%" + constraint + "%'";
Change:
String selection = ContactsContract.Contacts.DISPLAY_NAME + " IS NOT NULL";
to:
String constraint = "Lau";
String selection = ContactsContract.Contacts.DISPLAY_NAME + " LIKE '%" + constraint + "%'";
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