/**
     * Account type id
     */
    public static final String ACCOUNT_TYPE = "com.test.app";

    /**
     * Account name
     */
    public static final String ACCOUNT_NAME = "Test";

public static void addContact(Context context, User contact) {
        ContentResolver resolver = context.getContentResolver();
        resolver.delete(RawContacts.CONTENT_URI, RawContacts.ACCOUNT_TYPE
                + " = ?", new String[] { AccountConstants.ACCOUNT_TYPE });

        ArrayList<ContentProviderOperation> ops = new ArrayList<ContentProviderOperation>();

        ops.add(ContentProviderOperation
                .newInsert(
                        addCallerIsSyncAdapterParameter(
                                RawContacts.CONTENT_URI, true))
                .withValue(RawContacts.ACCOUNT_NAME,
                        AccountConstants.ACCOUNT_NAME)
                .withValue(RawContacts.ACCOUNT_TYPE,
                        AccountConstants.ACCOUNT_TYPE)
                // .withValue(RawContacts.SOURCE_ID, 12345)
                // .withValue(RawContacts.AGGREGATION_MODE,
                // RawContacts.AGGREGATION_MODE_DISABLED)
                .build());

        ops.add(ContentProviderOperation
                .newInsert(
                        addCallerIsSyncAdapterParameter(Settings.CONTENT_URI,
                                true))
                .withValue(RawContacts.ACCOUNT_NAME,
                        AccountConstants.ACCOUNT_NAME)
                .withValue(RawContacts.ACCOUNT_TYPE,
                        AccountConstants.ACCOUNT_TYPE)
                .withValue(Settings.UNGROUPED_VISIBLE, 1).build());

        ops.add(ContentProviderOperation
                .newInsert(
                        addCallerIsSyncAdapterParameter(Data.CONTENT_URI, true))
                .withValueBackReference(Data.RAW_CONTACT_ID, 0)
                .withValue(Data.MIMETYPE, StructuredName.CONTENT_ITEM_TYPE)
                .withValue(StructuredName.GIVEN_NAME, contact.getFullname())
                .withValue(StructuredName.FAMILY_NAME, contact.getFullname())
                .build());

        ops.add(ContentProviderOperation
                .newInsert(
                        addCallerIsSyncAdapterParameter(Data.CONTENT_URI, true))
                .withValueBackReference(Data.RAW_CONTACT_ID, 0)
                .withValue(
                        ContactsContract.Data.MIMETYPE,
                        ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE)
                .withValue(ContactsContract.CommonDataKinds.Phone.NUMBER,
                        contact.getPhoneNumber()).build());

        ops.add(ContentProviderOperation
                .newInsert(
                        addCallerIsSyncAdapterParameter(Data.CONTENT_URI, true))
                .withValueBackReference(Data.RAW_CONTACT_ID, 0)
                .withValue(
                        ContactsContract.Data.MIMETYPE,
                        ContactsContract.CommonDataKinds.Email.CONTENT_ITEM_TYPE)
                .withValue(ContactsContract.CommonDataKinds.Email.DATA,
                        contact.getEmail()).build());

        ops.add(ContentProviderOperation
                .newInsert(
                        addCallerIsSyncAdapterParameter(Data.CONTENT_URI, true))
                .withValueBackReference(Data.RAW_CONTACT_ID, 0)
                .withValue(Data.MIMETYPE, MIMETYPE)
                .withValue(Data.DATA1, contact.getFullname())
                .withValue(Data.DATA2, contact.getEmail())
                .withValue(Data.DATA3, contact.getHomeAddress()).build());
        try {
            ContentProviderResult[] results = resolver.applyBatch(
                    ContactsContract.AUTHORITY, ops);
            if (results.length == 0)
                AppLog.d(TAG, "Failed to add.");
        } catch (Exception e) {
            AppLog.e(TAG, e.getMessage(), e);
        }
    }

Problema - Atualmente, o código está adicionando um novo contato, mas não o mesclando ao contato existente com base no número de telefone. Preciso fazer alguma coisa antes de adicionar o contato? Gostaria de exibir minha conta do aplicativo em Contato, mesmo que o Whats App.

Eu implementei SyncService, SyncAdapter, Authenticator, Contacts.xml e outras classes necessárias para o projeto. A única coisa que não funciona é mostrar contato dentro do aplicativo de contato padrão em vez de criar um novo contato.

<ContactsSource xmlns:android="http://schemas.android.com/apk/res/android" >

    <ContactsDataKind
        android:detailColumn="data2"
        android:detailSocialSummary="true"
        android:icon="@drawable/ic_launcher"
        android:mimeType="vnd.android.cursor.item/com.test.app"
        android:summaryColumn="data3" />

</ContactsSource>