Search contact by phone number

In my app, user writes a phone number, and I want to find the contact name with that phone number?

I usually search the contacts like this:

Cursor cur = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI,
            null, null, null, null);

But I do this to access all contacts... In this app I only want to get the contact name of the given phone number... How can I restrict the query?

Or do I have to go trough all contacts and see if any has the gi开发者_StackOverflow中文版ven phone number? But I believe that this can be very slow this way...

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If you want the complete code:

public String getContactDisplayNameByNumber(String number) {
    Uri uri = Uri.withAppendedPath(ContactsContract.PhoneLookup.CONTENT_FILTER_URI, Uri.encode(number));
    String name = "?";

    ContentResolver contentResolver = getContentResolver();
    Cursor contactLookup = contentResolver.query(uri, new String[] {BaseColumns._ID,
            ContactsContract.PhoneLookup.DISPLAY_NAME }, null, null, null);

    try {
        if (contactLookup != null && contactLookup.getCount() > 0) {
            contactLookup.moveToNext();
            name = contactLookup.getString(contactLookup.getColumnIndex(ContactsContract.Data.DISPLAY_NAME));
            //String contactId = contactLookup.getString(contactLookup.getColumnIndex(BaseColumns._ID));
        }
    } finally {
        if (contactLookup != null) {
            contactLookup.close();
        }
    }

    return name;
}

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You should have a look at the recommended ContactsContract.PhoneLookup provider

A table that represents the result of looking up a phone number, for example for caller ID. To perform a lookup you must append the number you want to find to CONTENT_FILTER_URI. This query is highly optimized.

Uri uri = Uri.withAppendedPath(PhoneLookup.CONTENT_FILTER_URI, Uri.encode(phoneNumber));
resolver.query(uri, new String[]{PhoneLookup.DISPLAY_NAME,...