Question

I want to delete user name whose name is Leo. So I am putting delete query as follow

    int i = getContentResolver().delete(Contacts.CONTENT_URI, Contacts.DISPLAY_NAME +"= 'Leo'",null);
    System.out.println("rows deleted "+i);

but it returns "rows deleted 0"

what is wrong with it.

Edits :
The above is not working because the field is read only using Contacts.CONTENT_URI
You can see using following URI.
http://developer.android.com/reference/android/provider/ContactsContract.Contacts.html

Answer 1

http://developer.android.com/resources/samples/SampleSyncAdapter/index.html

In above link I can able to find the solution. I can able to delete contacts completely.

The problem is related to sync adapter.