AccountManager를 사용하여 Google API를 인증합니다

Question

나는 지금 이걸 며칠 동안 이것을 고투하고 있었다.Android의 AccountManager를 통해 인증을 사용하여 Google 캘린더를 호출하려고합니다.일반적인 방법을 사용하여 Auth 토큰을 검색합니다.

AccountManager manager = AccountManager.get(this);
String authToken = manager.getAuthToken(account, AUTH_TOKEN_TYPE, true, null, null).getResult().getString(AccountManager.KEY_AUTHTOKEN);

.

그리고 그 다음 토큰을 사용하면 다음과 같이 Calendar 인스턴스를 만듭니다.

HttpTransport transport = AndroidHttp.newCompatibleTransport();
JacksonFactory jsonFactory = new JacksonFactory();
GoogleAccessProtectedResource accessProtectedResource = new GoogleAccessProtectedResource(accessToken);
Calendar calendar = Calendar.builder(transport, jsonFactory).setApplicationName("MyApp/1.0").setJsonHttpRequestInitializer(new JsonHttpRequestInitializer() {
    @Override
    public void initialize(JsonHttpRequest request) {
        CalendarRequest calendarRequest = (CalendarRequest) request;
        calendarRequest.setKey(API_KEY);
    }
}).setHttpRequestInitializer(accessProtectedResource).build();

.

그러나이 기능을 사용하여 API 호출을 수행하면 아래에 표시된 401 Unauthorized 오류가 발생합니다.만료 된 인증 토큰을 무효화하는 코드가 포함되어있어 여기서 문제라고 믿지 않습니다.

com.google.api.client.googleapis.json.GoogleJsonResponseException: 401 Unauthorized
{
    "code" : 401,
    "errors" : [ {
        "domain" : "global",
        "location" : "Authorization",
        "locationType" : "header",
        "message" : "Invalid Credentials",
        "reason" : "authError"
    } ],
    "message" : "Invalid Credentials"
}

.

내가 뭘 잘못하고 있을지에 대한 생각은 무엇입니까?

Answer 1

Yes this is possible. Once you have a handle on the Google account (as you described), you just need to request an auth token from the AccountManager for the GData service.

If the android device already has an auth token (for the particular GData service you're trying to access), it will be returned to you. If not, the AccountManager will request one and return it to you. Either way, you don't need to worry about this as the AccountManager handles it.

In the following example, I am using the Google Spreadsheets API:

ArrayList<Account> googleAccounts = new ArrayList<Account>();

// Get all accounts 
Account[] accounts = accountManager.getAccounts();
  for(Account account : accounts) {
    // Filter out the Google accounts
    if(account.type.compareToIgnoreCase("com.google")) {
      googleAccounts.add(account);
    }
  }
AccountManager accountManager = AccountManager.get(activity);

// Just for the example, I am using the first google account returned.
Account account = googleAccounts.get(0);

// "wise" = Google Spreadheets
AccountManagerFuture<Bundle> amf = accountManager.getAuthToken(account, "wise", null, activity, null, null);

try {
  Bundle authTokenBundle = amf.getResult();
  String authToken = authTokenBundle.getString(AccountManager.KEY_AUTHTOKEN);

  // do something with the token
  InputStream response = sgc.getFeedAsStream(feedUrl, authToken, null, "2.1");

}

AND

Please have a look at the sample code in the google data api. The important thing to do after authentication is to call GoogleHeaders.setGoogleLogin(String).

I hope this helps.

Answer 2

Ran into a similar issue myself. I found that I need to set the xoauth_requestor_id in the unknown keys list ( reference : http://www.yenlo.nl/2011/google-calendar-api-v3-and-2lo/ )

This worked for me:

com.google.api.services.calendar.Calendar.CalendarList.List list = calendar.calendarList().list();
//Set the requestor id
list.getUnknownKeys().put("xoauth_requestor_id", "user@gmail.com");

After this the API calls went thru.

I wish there was a explanation as to why the requestor id is needed. Can someone explain?