现在还没有成功，我的想法是
ContentResolver contentresolver=getContentResolver();
Cursor cursor=contentresolver.query(RawContacts.CONTENT_URI,null, null, null, null);
while(cursor.moveToNext()){
long contactid = cursor.getLong(cursor.getColumnIndex(RawContacts._ID));
contentresolver.delete(RawContacts.CONTENT_URI, "Data.RAW_CONTACT_ID="+contactid, null);
}
大致就是通过Uri查询，然后用cursor得到具体的匹配条件，然后在用delete中的第二个参数决定删除特定的联系人，但是不成功，代码有问题，请教如何改正啊？急……
------解决方案--------------------
这么改应该可以了
String where = ContactsContract.Data._ID + " =?";
String[] whereparams = new String[]{rawId};
//content.delete(RawContacts.CONTENT_URI, where, whereparams);
long id = Long.parseLong(rawId);
//content.delete(ContentUris.withAppendedId(RawContacts.CONTENT_URI, id), null, null);
content.delete(ContactsContract.RawContacts.CONTENT_URI, where, whereparams);