Unable to retrieve account list using Google Contact APIs and OAuth 2.0

Question

I am trying to get a Google user contact list. This getContacts () is called in doInBackground () for AsyncTask. I have - this moment - already received a token. I was based on this codeLab example: https://codelabs.developers.google.com/codelabs/appauth-android-codelab/#0

I am changing point n ° 10 of this manual, trying to get the user's contact list instead of the user's personal information (<which works)

private List<ContactEntry> getContacts() {
        ContactsService contactsService = new ContactsService("MY_PRODUCT_NAME");
        contactsService.setHeader("Authorization", "Bearer " + token);

        try {
            URL feedUrl = new URL("https://www.google.com/m8/feeds/contacts/default/full");
            Query myQuery = new Query(feedUrl);
            ContactFeed resultFeed = contactsService.query(myQuery, ContactFeed.class);
            List<ContactEntry> contactEntries = resultFeed.getEntries();
            return contactEntries;
        } catch (Exception e) {
        }
        return null;
    }

My problem is that I always get an exception with this message:

java.lang.NullPointerException: No authentication header information

Any help? thanks in advance

Answer 1

?

Gmail?

, ? you'r sha1 ?

Answer 2

. :

:

ContactsService service = new ContactsService(applicationName);
service.getRequestFactory().setHeader("User-Agent", applicationName);

, service.setOAuth2Credentials() , Google , Google .. Google Credential, Google: googleCredential.refreshToken();.