我正在开发一个Android Honeycomb (v3.0)应用程序，该应用程序需要与Google Calendar API进行通信。我想允许我的应用程序访问一个特定的谷歌帐户的日历数据，以便读取和创建事件。
不幸的是，我遇到了使用OAuth2授权的问题。以下是目前为止的内容:
1)我想访问的日历的谷歌帐户是在我正在使用的Android设备内注册的。
2)我在该帐户的Google API控制台中启用了Calendar API。
3)我可以使用以下代码访问该帐户:
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用于与日历通信时使用。我遵循本教程，但将所有内容转换为使用Google Calendar而不是Google Tasks。通过使用getAuthToken和AUTH_TOKEN_TYPE == "oauth2:https://www.googleapis.com/auth/calendar"，我成功地从具有我想使用的帐户的AccountManager中检索到authToken。
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!
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)根据这个谷歌API视频(等待一分钟左右，以获得适用的内容)，这种例外的原因可能是我没有启用API访问在谷歌API控制台的帐户。然而，如果你看2)，你可以看到我确实这样做了。
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Calendar.setKey方法已弃用。在我之前链接的Google Tasks教程中，键是使用Tasks.accessKey = "key"设置的。不过，我不确定如何使用Calendar API来实现这个功能。我尝试了多个Google帐户，结果都是第5条中的例外。
9)我想指出的是，使用OAuth2的传统方法对我来说确实有效。下面是我使用的代码:
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:我想在设备本身上使用AccountManager中的帐户，以便检索工作OAuth2令牌，以便与Google Calendar API一起使用。第二种方法对我来说没有用，因为用户将不得不手动进入他们的web浏览器并获得授权代码，这对用户不友好。有人有什么想法吗?很抱歉写了这么长时间，谢谢!
尝试在构建器中添加JsonHttpRequestInitializer并在那里设置键:
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();
回答第10个问题:我基本上必须做你必须做的工作与TaskSample，然后使用Android GData日历样本在这里提供: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();
}