GetContentResolver (). delete does not work

Question

I am trying to delete a specific contact! I searched a lot, but every code I tried does not work!

public void delete(String name,String numero)
{
Cursor cur = getContentResolver().query(Contacts.CONTENT_URI,null, null, null, null);

while (cur.moveToNext())
{
    try
    {
        String[] selectionArgs=new String[]{String.valueOf(numero)};
        String lookupKey = cur.getString(cur.getColumnIndex(Contacts.LOOKUP_KEY));
        Uri uri = Uri.withAppendedPath(Contacts.CONTENT_LOOKUP_URI, lookupKey);
        getContentResolver().delete(uri, Phone.NUMBER +"=?", selectionArgs);
    }
    catch(Exception e)
    {
       System.out.println(e.getStackTrace());
    }
}

}

I also tried this instead of specifying selectionArgs, but nothing

getContentResolver().delete(uri, Contacts.DISPLAY_NAME +"="+ name, null);

and tried to change Contacts.to ContactsContract.Contacts., but still tried to delete using Contact displayname instead of number. It seems that the choice is not working! Uri$HierarchicalUriIs uri value right?

What is the problem?

Answer 1

Change

getContentResolver().delete(uri, Contacts.DISPLAY_NAME +"="+ name, null);

to

String[] names = {name};
getContentResolver().delete(uri, Contacts.DISPLAY_NAME +"=?", names);