7

我正在开发一个需要与 Google Calendar API 通信的 Android Honeycomb (v3.0) 应用程序。我想允许我的应用程序访问特定 Google 帐户的日历数据,以便读取和创建事件。

不幸的是,我遇到了使用 OAuth2 进行授权的问题。这是我到目前为止所拥有的:

1) 我想访问其日历的 Google 帐户已在我正在使用的 Android 设备中注册。

2) 我在帐户的 Google API 控制台中启用了日历 API。

3)我可以使用以下代码访问此帐户:

AccountManager accountManager = AccountManager.get(this.getBaseContext());
Account[] accounts = accountManager.getAccountsByType("com.google");
Account acc = accounts[0]; // The device only has one account on it

4) 我现在想获得一个 AuthToken 以在与日历通信时使用。我按照本教程进行操作,但将所有内容都转换为使用 Google 日历而不是 Google 任务。我通过使用with成功地authTokenAccountManager我想使用的帐户中检索到一个。getAuthTokenAUTH_TOKEN_TYPE == "oauth2:https://www.googleapis.com/auth/calendar"

5)这就是问题开始的地方。我现在在这一点上:

AccessProtectedResource accessProtectedResource = new GoogleAccessProtectedResource(tokens[0]); // this is the correct token
HttpTransport transport = AndroidHttp.newCompatibleTransport();
Calendar service = Calendar.builder(transport, new JacksonFactory())
    .setApplicationName("My Application's Name")
    .setHttpRequestInitializer(accessProtectedResource)
    .build();
service.setKey("myCalendarSimpleAPIAccessKey"); // This is deprecated???
Events events = service.events().list("primary").execute(); // Causes an exception!

6) 这是最后一行返回的异常:

com.google.api.client.googleapis.json.GoogleJsonResponseException: 403 Forbidden
{
  "code" : 403,
  "errors" : [ {
    "domain" : "usageLimits",
    "message" : "Daily Limit Exceeded. Please sign up",
    "reason" : "dailyLimitExceededUnreg",
    "extendedHelp" : "https://code.google.com/apis/console"
  } ],
  "message" : "Daily Limit Exceeded. Please sign up"
}

7) 根据此Google API 视频(请稍等一下以获取适用的内容),此异常的一个原因可能是我没有在 Google API 控制台中为该帐户启用 API 访问。但是,如果您查看 2),您会发现我确实这样做了。

8) 对我来说,问题似乎是我无法正确设置简单 API 访问密钥,因为该Calendar.setKey方法已被弃用。在我之前链接的 Google Tasks 教程中,密钥是使用Tasks.accessKey = "key". 不过,我不确定如何使用 Calendar API。我尝试了多个 Google 帐户,但都出现了 5) 的例外情况。

9) 我想指出,使用 OAuth2 的传统方法确实对我有用。这是我用于此的代码:

HttpTransport TRANSPORT = new NetHttpTransport();
JsonFactory JSON_FACTORY = new JacksonFactory();
String SCOPE = "https://www.googleapis.com/auth/calendar";
String CALLBACK_URL = "urn:ietf:wg:oauth:2.0:oob";
String CLIENT_ID = "myClientID";
String CLIENT_SECRET = "myClientSecret";
String authorizeUrl = new GoogleAuthorizationRequestUrl(CLIENT_ID, CALLBACK_URL, SCOPE).build();
String authorizationCode = "???"; // At this point, I have to manually go to the authorizeUrl and grab the authorization code from there to paste it in here while in debug mode

GoogleAuthorizationCodeGrant authRequest = new GoogleAuthorizationCodeGrant(TRANSPORT, JSON_FACTORY, CLIENT_ID, CLIENT_SECRET, authorizationCode, CALLBACK_URL);
authRequest.useBasicAuthorization = false;
AccessTokenResponse authResponse = authRequest.execute();
String accessToken = authResponse.accessToken; // gets the correct token

GoogleAccessProtectedResource access = new GoogleAccessProtectedResource(accessToken, TRANSPORT, JSON_FACTORY, CLIENT_ID, CLIENT_SECRET, authResponse.refreshToken);
HttpRequestFactory rf = TRANSPORT.createRequestFactory(access);
AccessProtectedResource accessProtectedResource = new GoogleAccessProtectedResource(accessToken);
HttpTransport transport = AndroidHttp.newCompatibleTransport();

Calendar service = Calendar.builder(transport, new JacksonFactory())
    .setApplicationName("My Application's Name")
    .setHttpRequestInitializer(accessProtectedResource)
    .build();

Events events = service.events().list("primary").execute(); // this works!

10) 最后,我的问题是:我想在设备本身的 AccountManager 中使用该帐户,以便检索一个有效的 OAuth2 令牌,以便与 Google Calendar API 一起使用。第二种方法对我没有用,因为用户必须手动转到他们的网络浏览器并获取授权码,这对用户不友好。有人有想法么?很抱歉发了这么长的帖子,谢谢!

4

2 回答 2

4

尝试将 JsonHttpRequestInitializer 添加到构建器并在那里设置您的密钥:

Calendar service = Calendar.builder(transport, new JacksonFactory())
.setApplicationName("My Application's Name")
.setHttpRequestInitializer(accessProtectedResource)
.setJsonHttpRequestInitializer(new JsonHttpRequestInitializer() {
    public void initialize(JsonHttpRequest request) {
        CalendarRequest calRequest = (CalendarRequest) request;
        calRequest.setKey("myCalendarSimpleAPIAccessKey");
    }

}).build();
于 2011-12-10T19:42:47.877 回答
1

要回答第 10 个问题:我基本上已经完成了使用 TaskSample 必须做的事情,然后使用此处提供的 Android GData 日历示例:http ://code.google.com/p/google-api-java- client/source/browse/calendar-android-sample/src/main/java/com/google/api/client/sample/calendar/android/CalendarSample.java?repo=samples 从 AccountManager 本身获取 AuthToken:

accountManager = new GoogleAccountManager(this);
settings = this.getSharedPreferences(PREF, 0);
gotAccount();

private void gotAccount() {
        Account account = accountManager.getAccountByName(accountName);
        if (account != null) {
            if (settings.getString(PREF_AUTH_TOKEN, null) == null) {
                accountManager.manager.getAuthToken(account, AUTH_TOKEN_TYPE,
                        true, new AccountManagerCallback<Bundle>() {

                            @Override
                            public void run(AccountManagerFuture<Bundle> future) {
                                try {
                                    Bundle bundle = future.getResult();
                                    if (bundle
                                            .containsKey(AccountManager.KEY_INTENT)) {
                                        Intent intent = bundle
                                                .getParcelable(AccountManager.KEY_INTENT);
                                        int flags = intent.getFlags();
                                        flags &= ~Intent.FLAG_ACTIVITY_NEW_TASK;
                                        intent.setFlags(flags);
                                        startActivityForResult(intent,
                                                REQUEST_AUTHENTICATE);
                                    } else if (bundle
                                            .containsKey(AccountManager.KEY_AUTHTOKEN)) {
                                        setAuthToken(bundle
                                                .getString(AccountManager.KEY_AUTHTOKEN));
                                        // executeRefreshCalendars();
                                    }
                                } catch (Exception e) {
                                    handleException(e);
                                }
                            }
                        }, null);
            } else {
                // executeRefreshCalendars();
            }
            return;
        }
        chooseAccount();
    }

private void chooseAccount() {
    accountManager.manager.getAuthTokenByFeatures(
            GoogleAccountManager.ACCOUNT_TYPE, AUTH_TOKEN_TYPE, null,
            ExportClockOption.this, null, null,
            new AccountManagerCallback<Bundle>() {

                @Override
                public void run(AccountManagerFuture<Bundle> future) {
                    Bundle bundle;
                    try {
                        bundle = future.getResult();
                        setAccountName(bundle
                                .getString(AccountManager.KEY_ACCOUNT_NAME));
                        setAuthToken(bundle
                                .getString(AccountManager.KEY_AUTHTOKEN));
                        // executeRefreshCalendars();
                    } catch (OperationCanceledException e) {
                        // user canceled
                    } catch (AuthenticatorException e) {
                        handleException(e);
                    } catch (IOException e) {
                        handleException(e);
                    }
                }
            }, null);
}

void setAuthToken(String authToken) {
    SharedPreferences.Editor editor = settings.edit();
    editor.putString(PREF_AUTH_TOKEN, authToken);
    editor.commit();
    createCalendarService(authToken);
    try {
        Events events = service.events().list("primary").execute();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

}

private void createCalendarService(String authToken) {
    accessProtectedResource = new GoogleAccessProtectedResource(authToken);

    Log.i(TAG, "accessProtectedResource.getAccessToken() = "
            + accessProtectedResource.getAccessToken());
    JacksonFactory jsonFactory = new JacksonFactory();
    service = com.google.api.services.calendar.Calendar
            .builder(transport, jsonFactory)
            .setApplicationName("Time Journal")
            .setJsonHttpRequestInitializer(
                    new JsonHttpRequestInitializer() {
                        @Override
                        public void initialize(JsonHttpRequest request) {
                            CalendarRequest calendarRequest = (CalendarRequest) request;
                            calendarRequest
                                    .setKey("<YOUR SIMPLE API KEY>");
                        }
                    }).setHttpRequestInitializer(accessProtectedResource)
            .build();
}
于 2011-12-23T20:35:58.187 回答