我想使用de java Google电子表格API访问Google云端硬盘上的电子表格。在过去,我使用客户端登录方法登录,但现在不推荐使用此方法。现在我正在尝试使用服务帐户进行身份验证而不与用户交互,因为该工具在后台运行我需要自动化。但我无法让它发挥作用。这些我的代码现在。
List<String> SCOPES_ARRAY = Arrays.asList(
"https://www.googleapis.com/auth/drive.file",
"https://www.googleapis.com/auth/userinfo.email",
"https://www.googleapis.com/auth/userinfo.profile",
"https://docs.google.com/feeds",
"https://spreadsheets.google.com/feeds");
credential = new GoogleCredential.Builder()
.setTransport(transport)
.setJsonFactory(jsonFactory)
.setServiceAccountId(
"[email protected]")
.setServiceAccountScopes(SCOPES_ARRAY)
.setServiceAccountPrivateKeyFromP12File(p12)
.setServiceAccountUser("[email protected]")
.build();
service = new SpreadsheetService("MonitorV3");
service.setOAuth2Credentials(credential);
SPREADSHEET_FEED_URL = new URL("https://spreadsheets.google.com/feeds/spreadsheets/private/full");
worksheetFeed = service.getFeed(spreadsheet.getWorksheetFeedUrl(),
WorksheetFeed.class);
但是在执行最后一行时我得到了一个nullpointerexception。刷新令牌出了问题。有人看到我做错了吗?
我做了一个独立的简单应用程序,现在我得到以下详细错误:
Exception in thread "main" com.google.gdata.util.AuthenticationException: Failed to refresh access token: 401 Unauthorized
at com.google.gdata.client.GoogleAuthTokenFactory$OAuth2Token.refreshToken(GoogleAuthTokenFactory.java:260)
at com.google.gdata.client.GoogleAuthTokenFactory.handleSessionExpiredException(GoogleAuthTokenFactory.java:702)
at com.google.gdata.client.GoogleService.handleSessionExpiredException(GoogleService.java:738)
at com.google.gdata.client.GoogleService.getFeed(GoogleService.java:649)
at com.google.gdata.client.Service.getFeed(Service.java:1017)
at JavaApplication20.printDocuments(JavaApplication20.java:50)
at main.main(main.java:35)
我通过使用以下代码修复此问题:
credential = new GoogleCredential.Builder()
.setTransport(transport)
.setJsonFactory(jsonFactory)
.setServiceAccountId("618982716759-9ele96d95b7gqar6tn2ofa7jrjrudlol@developer.gserviceaccount.com")
.setServiceAccountPrivateKeyFromP12File(p12)
.setServiceAccountScopes(SCOPES_ARRAY).build();
credential.refreshToken();
所以没有.setServiceAccountUser(“[email protected]”)。现在它没有任何错误。
使用Google服务帐户访问Google表格的另一种方法是:
InputStream inputStream = getAssets().open("service_account_key.json"); // put your service account's key.json file in asset folder.
GoogleCredential googleCredential = GoogleCredential.fromStream(inputStream)
.createScoped(Collections.singleton(SheetsScopes.SPREADSHEETS_READONLY));
这里需要注意的重点:
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
.permitAll().build();
StrictMode.setThreadPolicy(policy);
有关详细说明,请参阅以下文档:
https://developers.google.com/sheets/quickstart/android?hl=es-419#step_5_setup_the_sample https://developers.google.com/identity/protocols/OAuth2ServiceAccount#authorizingrequests
快乐的Androiding。